./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe035_pso.oepc_pso.opt_rmo.oepc_rmo.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe035_pso.oepc_pso.opt_rmo.oepc_rmo.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe035_pso.oepc_pso.opt_rmo.oepc_rmo.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe035_pso.oepc_pso.opt_rmo.oepc_rmo.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 15:58:32,715 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 15:58:32,784 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 15:58:32,788 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 15:58:32,789 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 15:58:32,814 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 15:58:32,814 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 15:58:32,814 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 15:58:32,815 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 15:58:32,818 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 15:58:32,818 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 15:58:32,818 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 15:58:32,819 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 15:58:32,820 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 15:58:32,820 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 15:58:32,821 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 15:58:32,821 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 15:58:32,821 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 15:58:32,821 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 15:58:32,821 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 15:58:32,822 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 15:58:32,823 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 15:58:32,823 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 15:58:32,823 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 15:58:32,823 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 15:58:32,824 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 15:58:32,824 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 15:58:32,824 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 15:58:32,825 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 15:58:32,825 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 15:58:32,826 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 15:58:32,826 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 15:58:32,826 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 15:58:32,826 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 15:58:32,826 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 15:58:32,826 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 15:58:32,827 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 15:58:32,827 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 15:58:32,827 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 15:58:32,827 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 15:58:32,827 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 15:58:32,828 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 15:58:32,828 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 15:58:32,828 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 15:58:33,065 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 15:58:33,083 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 15:58:33,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 15:58:33,087 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 15:58:33,088 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 15:58:33,088 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe035_pso.oepc_pso.opt_rmo.oepc_rmo.opt_tso.oepc_tso.opt.i [2024-06-21 15:58:34,156 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 15:58:34,331 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 15:58:34,331 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe035_pso.oepc_pso.opt_rmo.oepc_rmo.opt_tso.oepc_tso.opt.i [2024-06-21 15:58:34,341 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c17ecac0/cf8576ae365e47bb958e44f538d7c01b/FLAG1e6922eed [2024-06-21 15:58:34,356 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c17ecac0/cf8576ae365e47bb958e44f538d7c01b [2024-06-21 15:58:34,358 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 15:58:34,359 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 15:58:34,361 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe035_pso.oepc_pso.opt_rmo.oepc_rmo.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-21 15:58:34,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 15:58:34,470 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 15:58:34,471 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 15:58:34,471 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 15:58:34,475 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 15:58:34,475 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 03:58:34" (1/2) ... [2024-06-21 15:58:34,476 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43c37f8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:58:34, skipping insertion in model container [2024-06-21 15:58:34,477 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 03:58:34" (1/2) ... [2024-06-21 15:58:34,478 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@28e2893b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:58:34, skipping insertion in model container [2024-06-21 15:58:34,479 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:58:34" (2/2) ... [2024-06-21 15:58:34,479 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43c37f8c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:58:34, skipping insertion in model container [2024-06-21 15:58:34,479 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:58:34" (2/2) ... [2024-06-21 15:58:34,479 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 15:58:34,544 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 15:58:34,546 INFO L97 edCorrectnessWitness]: Location invariant before [L787-L787] (((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) [2024-06-21 15:58:34,546 INFO L97 edCorrectnessWitness]: Location invariant before [L790-L790] (((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) [2024-06-21 15:58:34,546 INFO L97 edCorrectnessWitness]: Location invariant before [L789-L789] (((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) [2024-06-21 15:58:34,546 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 15:58:34,546 INFO L106 edCorrectnessWitness]: ghost_update [L785-L785] multithreaded = 1; [2024-06-21 15:58:34,606 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 15:58:34,887 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 15:58:34,897 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 15:58:34,993 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 15:58:35,020 INFO L206 MainTranslator]: Completed translation [2024-06-21 15:58:35,021 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:58:35 WrapperNode [2024-06-21 15:58:35,021 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 15:58:35,022 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 15:58:35,022 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 15:58:35,022 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 15:58:35,027 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:58:35" (1/1) ... [2024-06-21 15:58:35,040 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:58:35" (1/1) ... [2024-06-21 15:58:35,054 INFO L138 Inliner]: procedures = 175, calls = 48, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-21 15:58:35,055 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 15:58:35,060 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 15:58:35,060 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 15:58:35,060 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 15:58:35,068 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:58:35" (1/1) ... [2024-06-21 15:58:35,068 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:58:35" (1/1) ... [2024-06-21 15:58:35,070 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:58:35" (1/1) ... [2024-06-21 15:58:35,080 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 15:58:35,080 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:58:35" (1/1) ... [2024-06-21 15:58:35,080 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:58:35" (1/1) ... [2024-06-21 15:58:35,093 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:58:35" (1/1) ... [2024-06-21 15:58:35,094 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:58:35" (1/1) ... [2024-06-21 15:58:35,095 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:58:35" (1/1) ... [2024-06-21 15:58:35,096 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:58:35" (1/1) ... [2024-06-21 15:58:35,098 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 15:58:35,098 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 15:58:35,098 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 15:58:35,099 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 15:58:35,099 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:58:35" (1/1) ... [2024-06-21 15:58:35,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 15:58:35,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 15:58:35,121 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 15:58:35,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 15:58:35,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 15:58:35,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 15:58:35,151 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 15:58:35,151 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 15:58:35,151 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 15:58:35,151 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 15:58:35,151 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 15:58:35,151 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 15:58:35,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 15:58:35,152 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 15:58:35,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 15:58:35,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 15:58:35,153 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 15:58:35,241 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 15:58:35,243 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 15:58:35,377 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 15:58:35,378 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 15:58:35,445 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 15:58:35,447 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 15:58:35,447 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 03:58:35 BoogieIcfgContainer [2024-06-21 15:58:35,447 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 15:58:35,449 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 15:58:35,449 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 15:58:35,451 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 15:58:35,451 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 03:58:34" (1/4) ... [2024-06-21 15:58:35,452 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57bca8ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 03:58:35, skipping insertion in model container [2024-06-21 15:58:35,452 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:58:34" (2/4) ... [2024-06-21 15:58:35,452 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57bca8ac and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 03:58:35, skipping insertion in model container [2024-06-21 15:58:35,452 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:58:35" (3/4) ... [2024-06-21 15:58:35,452 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57bca8ac and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 03:58:35, skipping insertion in model container [2024-06-21 15:58:35,453 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 03:58:35" (4/4) ... [2024-06-21 15:58:35,453 INFO L112 eAbstractionObserver]: Analyzing ICFG safe035_pso.oepc_pso.opt_rmo.oepc_rmo.opt_tso.oepc_tso.opt.i [2024-06-21 15:58:35,465 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 15:58:35,466 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 15:58:35,466 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 15:58:35,497 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 15:58:35,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 15:58:35,549 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-21 15:58:35,549 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 15:58:35,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 15:58:35,550 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 15:58:35,552 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-21 15:58:35,559 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 15:58:35,565 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;@39e0578a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 15:58:35,565 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 15:58:35,569 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 15:58:35,569 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 15:58:35,569 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 15:58:35,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:35,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 15:58:35,571 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:35,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:35,574 INFO L85 PathProgramCache]: Analyzing trace with hash 224409784, now seen corresponding path program 1 times [2024-06-21 15:58:35,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:35,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701640437] [2024-06-21 15:58:35,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:35,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:35,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:35,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:35,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701640437] [2024-06-21 15:58:35,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701640437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:35,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:35,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 15:58:35,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005369386] [2024-06-21 15:58:35,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:35,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 15:58:35,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:35,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 15:58:35,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 15:58:36,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2024-06-21 15:58:36,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:36,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:36,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2024-06-21 15:58:36,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:36,125 INFO L124 PetriNetUnfolderBase]: 471/886 cut-off events. [2024-06-21 15:58:36,126 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-21 15:58:36,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1674 conditions, 886 events. 471/886 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4806 event pairs, 288 based on Foata normal form. 1/815 useless extension candidates. Maximal degree in co-relation 1662. Up to 733 conditions per place. [2024-06-21 15:58:36,134 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 27 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-21 15:58:36,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 165 flow [2024-06-21 15:58:36,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 15:58:36,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 15:58:36,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2024-06-21 15:58:36,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7286821705426356 [2024-06-21 15:58:36,145 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 94 transitions. [2024-06-21 15:58:36,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 165 flow [2024-06-21 15:58:36,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 160 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 15:58:36,150 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-21 15:58:36,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-21 15:58:36,154 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-21 15:58:36,154 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-21 15:58:36,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:36,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:36,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:36,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 15:58:36,155 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:36,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:36,156 INFO L85 PathProgramCache]: Analyzing trace with hash 910381335, now seen corresponding path program 1 times [2024-06-21 15:58:36,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:36,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134410344] [2024-06-21 15:58:36,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:36,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:36,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:36,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:36,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:36,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134410344] [2024-06-21 15:58:36,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134410344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:36,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:36,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 15:58:36,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085186469] [2024-06-21 15:58:36,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:36,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:58:36,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:36,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:58:36,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:58:36,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-06-21 15:58:36,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:36,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:36,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-06-21 15:58:36,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:36,444 INFO L124 PetriNetUnfolderBase]: 737/1262 cut-off events. [2024-06-21 15:58:36,444 INFO L125 PetriNetUnfolderBase]: For 247/247 co-relation queries the response was YES. [2024-06-21 15:58:36,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2810 conditions, 1262 events. 737/1262 cut-off events. For 247/247 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6805 event pairs, 403 based on Foata normal form. 4/1237 useless extension candidates. Maximal degree in co-relation 2798. Up to 1096 conditions per place. [2024-06-21 15:58:36,451 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 38 selfloop transitions, 11 changer transitions 0/60 dead transitions. [2024-06-21 15:58:36,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 60 transitions, 266 flow [2024-06-21 15:58:36,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:58:36,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:58:36,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-06-21 15:58:36,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7093023255813954 [2024-06-21 15:58:36,456 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 122 transitions. [2024-06-21 15:58:36,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 60 transitions, 266 flow [2024-06-21 15:58:36,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 60 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 15:58:36,461 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 176 flow [2024-06-21 15:58:36,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2024-06-21 15:58:36,461 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2024-06-21 15:58:36,462 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 176 flow [2024-06-21 15:58:36,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:36,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:36,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:36,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 15:58:36,465 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:36,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:36,467 INFO L85 PathProgramCache]: Analyzing trace with hash 653072864, now seen corresponding path program 1 times [2024-06-21 15:58:36,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:36,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498865710] [2024-06-21 15:58:36,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:36,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:36,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:36,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:36,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498865710] [2024-06-21 15:58:36,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498865710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:36,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:36,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 15:58:36,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022325430] [2024-06-21 15:58:36,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:36,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:58:36,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:36,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:58:36,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:58:36,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 43 [2024-06-21 15:58:36,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 176 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:36,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:36,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 43 [2024-06-21 15:58:36,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:36,823 INFO L124 PetriNetUnfolderBase]: 640/1205 cut-off events. [2024-06-21 15:58:36,823 INFO L125 PetriNetUnfolderBase]: For 803/811 co-relation queries the response was YES. [2024-06-21 15:58:36,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3074 conditions, 1205 events. 640/1205 cut-off events. For 803/811 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6759 event pairs, 322 based on Foata normal form. 2/1175 useless extension candidates. Maximal degree in co-relation 3059. Up to 960 conditions per place. [2024-06-21 15:58:36,831 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 38 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-21 15:58:36,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 59 transitions, 308 flow [2024-06-21 15:58:36,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:58:36,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:58:36,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-06-21 15:58:36,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6802325581395349 [2024-06-21 15:58:36,835 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 176 flow. Second operand 4 states and 117 transitions. [2024-06-21 15:58:36,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 59 transitions, 308 flow [2024-06-21 15:58:36,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 59 transitions, 304 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 15:58:36,839 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 214 flow [2024-06-21 15:58:36,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2024-06-21 15:58:36,840 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-21 15:58:36,840 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 214 flow [2024-06-21 15:58:36,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:36,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:36,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:36,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 15:58:36,841 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:36,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:36,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1970035349, now seen corresponding path program 1 times [2024-06-21 15:58:36,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:36,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888294922] [2024-06-21 15:58:36,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:36,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:36,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:36,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:36,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888294922] [2024-06-21 15:58:36,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888294922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:36,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:36,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:36,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335003060] [2024-06-21 15:58:36,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:36,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:36,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:36,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:36,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:37,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:37,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 214 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:37,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:37,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:37,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:37,219 INFO L124 PetriNetUnfolderBase]: 940/1597 cut-off events. [2024-06-21 15:58:37,220 INFO L125 PetriNetUnfolderBase]: For 1705/1705 co-relation queries the response was YES. [2024-06-21 15:58:37,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4529 conditions, 1597 events. 940/1597 cut-off events. For 1705/1705 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 8399 event pairs, 287 based on Foata normal form. 8/1601 useless extension candidates. Maximal degree in co-relation 4511. Up to 1330 conditions per place. [2024-06-21 15:58:37,229 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 54 selfloop transitions, 18 changer transitions 0/82 dead transitions. [2024-06-21 15:58:37,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 82 transitions, 464 flow [2024-06-21 15:58:37,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:37,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:37,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-21 15:58:37,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-21 15:58:37,258 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 214 flow. Second operand 6 states and 172 transitions. [2024-06-21 15:58:37,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 82 transitions, 464 flow [2024-06-21 15:58:37,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 82 transitions, 446 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 15:58:37,261 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 284 flow [2024-06-21 15:58:37,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=284, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2024-06-21 15:58:37,262 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2024-06-21 15:58:37,262 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 284 flow [2024-06-21 15:58:37,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:37,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:37,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:37,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 15:58:37,263 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:37,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:37,263 INFO L85 PathProgramCache]: Analyzing trace with hash 537604129, now seen corresponding path program 1 times [2024-06-21 15:58:37,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:37,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776030922] [2024-06-21 15:58:37,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:37,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:37,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:37,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:37,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:37,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776030922] [2024-06-21 15:58:37,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776030922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:37,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:37,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:58:37,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770933356] [2024-06-21 15:58:37,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:37,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:58:37,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:37,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:58:37,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:58:37,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:37,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 284 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 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) [2024-06-21 15:58:37,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:37,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:37,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:37,513 INFO L124 PetriNetUnfolderBase]: 966/1680 cut-off events. [2024-06-21 15:58:37,514 INFO L125 PetriNetUnfolderBase]: For 2751/2751 co-relation queries the response was YES. [2024-06-21 15:58:37,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5187 conditions, 1680 events. 966/1680 cut-off events. For 2751/2751 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 9095 event pairs, 323 based on Foata normal form. 3/1677 useless extension candidates. Maximal degree in co-relation 5167. Up to 1376 conditions per place. [2024-06-21 15:58:37,524 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 60 selfloop transitions, 21 changer transitions 0/91 dead transitions. [2024-06-21 15:58:37,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 91 transitions, 610 flow [2024-06-21 15:58:37,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:58:37,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:58:37,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-21 15:58:37,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6790697674418604 [2024-06-21 15:58:37,525 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 284 flow. Second operand 5 states and 146 transitions. [2024-06-21 15:58:37,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 91 transitions, 610 flow [2024-06-21 15:58:37,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 91 transitions, 564 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 15:58:37,529 INFO L231 Difference]: Finished difference. Result has 59 places, 68 transitions, 392 flow [2024-06-21 15:58:37,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=392, PETRI_PLACES=59, PETRI_TRANSITIONS=68} [2024-06-21 15:58:37,530 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 15 predicate places. [2024-06-21 15:58:37,530 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 68 transitions, 392 flow [2024-06-21 15:58:37,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 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) [2024-06-21 15:58:37,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:37,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:37,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 15:58:37,531 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:37,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:37,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1396715809, now seen corresponding path program 2 times [2024-06-21 15:58:37,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:37,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604462124] [2024-06-21 15:58:37,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:37,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:37,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:37,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604462124] [2024-06-21 15:58:37,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604462124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:37,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:37,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:58:37,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416367299] [2024-06-21 15:58:37,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:37,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:58:37,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:37,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:58:37,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:58:37,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:37,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 68 transitions, 392 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 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) [2024-06-21 15:58:37,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:37,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:37,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:37,799 INFO L124 PetriNetUnfolderBase]: 960/1666 cut-off events. [2024-06-21 15:58:37,799 INFO L125 PetriNetUnfolderBase]: For 4024/4024 co-relation queries the response was YES. [2024-06-21 15:58:37,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5664 conditions, 1666 events. 960/1666 cut-off events. For 4024/4024 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8984 event pairs, 323 based on Foata normal form. 3/1664 useless extension candidates. Maximal degree in co-relation 5642. Up to 1372 conditions per place. [2024-06-21 15:58:37,810 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 58 selfloop transitions, 20 changer transitions 0/88 dead transitions. [2024-06-21 15:58:37,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 88 transitions, 628 flow [2024-06-21 15:58:37,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:58:37,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:58:37,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-06-21 15:58:37,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6558139534883721 [2024-06-21 15:58:37,811 INFO L175 Difference]: Start difference. First operand has 59 places, 68 transitions, 392 flow. Second operand 5 states and 141 transitions. [2024-06-21 15:58:37,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 88 transitions, 628 flow [2024-06-21 15:58:37,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 88 transitions, 600 flow, removed 14 selfloop flow, removed 0 redundant places. [2024-06-21 15:58:37,818 INFO L231 Difference]: Finished difference. Result has 65 places, 70 transitions, 438 flow [2024-06-21 15:58:37,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=438, PETRI_PLACES=65, PETRI_TRANSITIONS=70} [2024-06-21 15:58:37,818 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-21 15:58:37,818 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 70 transitions, 438 flow [2024-06-21 15:58:37,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 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) [2024-06-21 15:58:37,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:37,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:37,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 15:58:37,819 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:37,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:37,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1781740498, now seen corresponding path program 1 times [2024-06-21 15:58:37,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:37,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355237644] [2024-06-21 15:58:37,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:37,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:37,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:37,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:37,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:37,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355237644] [2024-06-21 15:58:37,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355237644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:37,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:37,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 15:58:37,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834469898] [2024-06-21 15:58:37,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:37,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:58:37,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:37,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:58:37,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:58:37,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-06-21 15:58:37,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 70 transitions, 438 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:37,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:37,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-06-21 15:58:37,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:38,048 INFO L124 PetriNetUnfolderBase]: 878/1545 cut-off events. [2024-06-21 15:58:38,048 INFO L125 PetriNetUnfolderBase]: For 4494/4494 co-relation queries the response was YES. [2024-06-21 15:58:38,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5409 conditions, 1545 events. 878/1545 cut-off events. For 4494/4494 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8423 event pairs, 356 based on Foata normal form. 3/1539 useless extension candidates. Maximal degree in co-relation 5383. Up to 1284 conditions per place. [2024-06-21 15:58:38,059 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 46 selfloop transitions, 16 changer transitions 0/78 dead transitions. [2024-06-21 15:58:38,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 78 transitions, 582 flow [2024-06-21 15:58:38,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:58:38,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:58:38,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-06-21 15:58:38,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6511627906976745 [2024-06-21 15:58:38,061 INFO L175 Difference]: Start difference. First operand has 65 places, 70 transitions, 438 flow. Second operand 4 states and 112 transitions. [2024-06-21 15:58:38,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 78 transitions, 582 flow [2024-06-21 15:58:38,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 78 transitions, 540 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 15:58:38,066 INFO L231 Difference]: Finished difference. Result has 66 places, 70 transitions, 439 flow [2024-06-21 15:58:38,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=439, PETRI_PLACES=66, PETRI_TRANSITIONS=70} [2024-06-21 15:58:38,067 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2024-06-21 15:58:38,067 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 70 transitions, 439 flow [2024-06-21 15:58:38,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:38,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:38,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:38,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 15:58:38,068 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:38,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:38,068 INFO L85 PathProgramCache]: Analyzing trace with hash -885852928, now seen corresponding path program 1 times [2024-06-21 15:58:38,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:38,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073014779] [2024-06-21 15:58:38,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:38,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:38,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:38,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:38,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073014779] [2024-06-21 15:58:38,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073014779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:38,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:38,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:38,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118659793] [2024-06-21 15:58:38,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:38,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:38,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:38,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:38,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:38,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:38,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 70 transitions, 439 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:38,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:38,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:38,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:38,401 INFO L124 PetriNetUnfolderBase]: 958/1644 cut-off events. [2024-06-21 15:58:38,401 INFO L125 PetriNetUnfolderBase]: For 5350/5350 co-relation queries the response was YES. [2024-06-21 15:58:38,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5830 conditions, 1644 events. 958/1644 cut-off events. For 5350/5350 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 8748 event pairs, 339 based on Foata normal form. 3/1643 useless extension candidates. Maximal degree in co-relation 5803. Up to 1388 conditions per place. [2024-06-21 15:58:38,412 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 68 selfloop transitions, 21 changer transitions 0/99 dead transitions. [2024-06-21 15:58:38,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 99 transitions, 709 flow [2024-06-21 15:58:38,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:38,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:38,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-06-21 15:58:38,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6589147286821705 [2024-06-21 15:58:38,414 INFO L175 Difference]: Start difference. First operand has 66 places, 70 transitions, 439 flow. Second operand 6 states and 170 transitions. [2024-06-21 15:58:38,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 99 transitions, 709 flow [2024-06-21 15:58:38,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 99 transitions, 669 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 15:58:38,422 INFO L231 Difference]: Finished difference. Result has 69 places, 74 transitions, 486 flow [2024-06-21 15:58:38,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=486, PETRI_PLACES=69, PETRI_TRANSITIONS=74} [2024-06-21 15:58:38,422 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 25 predicate places. [2024-06-21 15:58:38,423 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 74 transitions, 486 flow [2024-06-21 15:58:38,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:38,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:38,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:38,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 15:58:38,423 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:38,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:38,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1130934468, now seen corresponding path program 2 times [2024-06-21 15:58:38,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:38,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203528179] [2024-06-21 15:58:38,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:38,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:38,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:38,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:38,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:38,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203528179] [2024-06-21 15:58:38,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203528179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:38,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:38,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:38,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008054017] [2024-06-21 15:58:38,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:38,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:38,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:38,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:38,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:38,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:38,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 74 transitions, 486 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:38,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:38,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:38,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:38,717 INFO L124 PetriNetUnfolderBase]: 982/1712 cut-off events. [2024-06-21 15:58:38,718 INFO L125 PetriNetUnfolderBase]: For 6735/6735 co-relation queries the response was YES. [2024-06-21 15:58:38,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6462 conditions, 1712 events. 982/1712 cut-off events. For 6735/6735 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9294 event pairs, 310 based on Foata normal form. 3/1707 useless extension candidates. Maximal degree in co-relation 6435. Up to 1332 conditions per place. [2024-06-21 15:58:38,729 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 62 selfloop transitions, 39 changer transitions 0/111 dead transitions. [2024-06-21 15:58:38,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 111 transitions, 894 flow [2024-06-21 15:58:38,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:38,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:38,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-06-21 15:58:38,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6744186046511628 [2024-06-21 15:58:38,730 INFO L175 Difference]: Start difference. First operand has 69 places, 74 transitions, 486 flow. Second operand 6 states and 174 transitions. [2024-06-21 15:58:38,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 111 transitions, 894 flow [2024-06-21 15:58:38,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 111 transitions, 837 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 15:58:38,739 INFO L231 Difference]: Finished difference. Result has 71 places, 85 transitions, 618 flow [2024-06-21 15:58:38,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=618, PETRI_PLACES=71, PETRI_TRANSITIONS=85} [2024-06-21 15:58:38,739 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2024-06-21 15:58:38,739 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 85 transitions, 618 flow [2024-06-21 15:58:38,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:38,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:38,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:38,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 15:58:38,740 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:38,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:38,741 INFO L85 PathProgramCache]: Analyzing trace with hash -641842626, now seen corresponding path program 1 times [2024-06-21 15:58:38,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:38,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886793617] [2024-06-21 15:58:38,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:38,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:38,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:38,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:38,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:38,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886793617] [2024-06-21 15:58:38,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886793617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:38,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:38,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:38,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721662976] [2024-06-21 15:58:38,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:38,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:38,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:38,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:38,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:38,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:38,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 85 transitions, 618 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:38,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:38,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:38,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:39,011 INFO L124 PetriNetUnfolderBase]: 1006/1745 cut-off events. [2024-06-21 15:58:39,011 INFO L125 PetriNetUnfolderBase]: For 8815/8815 co-relation queries the response was YES. [2024-06-21 15:58:39,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7060 conditions, 1745 events. 1006/1745 cut-off events. For 8815/8815 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9481 event pairs, 313 based on Foata normal form. 3/1740 useless extension candidates. Maximal degree in co-relation 7032. Up to 1381 conditions per place. [2024-06-21 15:58:39,022 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 78 selfloop transitions, 34 changer transitions 0/122 dead transitions. [2024-06-21 15:58:39,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 122 transitions, 1058 flow [2024-06-21 15:58:39,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:39,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:39,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-21 15:58:39,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6705426356589147 [2024-06-21 15:58:39,024 INFO L175 Difference]: Start difference. First operand has 71 places, 85 transitions, 618 flow. Second operand 6 states and 173 transitions. [2024-06-21 15:58:39,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 122 transitions, 1058 flow [2024-06-21 15:58:39,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 122 transitions, 1020 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-21 15:58:39,033 INFO L231 Difference]: Finished difference. Result has 77 places, 97 transitions, 789 flow [2024-06-21 15:58:39,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=789, PETRI_PLACES=77, PETRI_TRANSITIONS=97} [2024-06-21 15:58:39,034 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 33 predicate places. [2024-06-21 15:58:39,034 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 97 transitions, 789 flow [2024-06-21 15:58:39,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:39,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:39,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:39,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 15:58:39,035 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)] === [2024-06-21 15:58:39,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:39,035 INFO L85 PathProgramCache]: Analyzing trace with hash -2080825024, now seen corresponding path program 3 times [2024-06-21 15:58:39,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:39,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264022132] [2024-06-21 15:58:39,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:39,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:39,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:39,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:39,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:39,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264022132] [2024-06-21 15:58:39,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264022132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:39,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:39,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:39,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364645142] [2024-06-21 15:58:39,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:39,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:39,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:39,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:39,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:39,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:39,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 97 transitions, 789 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:39,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:39,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:39,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:39,308 INFO L124 PetriNetUnfolderBase]: 1000/1726 cut-off events. [2024-06-21 15:58:39,308 INFO L125 PetriNetUnfolderBase]: For 11160/11160 co-relation queries the response was YES. [2024-06-21 15:58:39,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7597 conditions, 1726 events. 1000/1726 cut-off events. For 11160/11160 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9336 event pairs, 303 based on Foata normal form. 3/1721 useless extension candidates. Maximal degree in co-relation 7565. Up to 1362 conditions per place. [2024-06-21 15:58:39,320 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 73 selfloop transitions, 35 changer transitions 0/118 dead transitions. [2024-06-21 15:58:39,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 118 transitions, 1079 flow [2024-06-21 15:58:39,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:39,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:39,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-21 15:58:39,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6472868217054264 [2024-06-21 15:58:39,321 INFO L175 Difference]: Start difference. First operand has 77 places, 97 transitions, 789 flow. Second operand 6 states and 167 transitions. [2024-06-21 15:58:39,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 118 transitions, 1079 flow [2024-06-21 15:58:39,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 118 transitions, 1030 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-21 15:58:39,333 INFO L231 Difference]: Finished difference. Result has 82 places, 97 transitions, 819 flow [2024-06-21 15:58:39,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=740, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=819, PETRI_PLACES=82, PETRI_TRANSITIONS=97} [2024-06-21 15:58:39,334 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 38 predicate places. [2024-06-21 15:58:39,334 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 97 transitions, 819 flow [2024-06-21 15:58:39,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:39,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:39,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:39,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 15:58:39,335 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:39,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:39,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1564761662, now seen corresponding path program 2 times [2024-06-21 15:58:39,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:39,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112584001] [2024-06-21 15:58:39,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:39,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:39,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:39,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:39,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112584001] [2024-06-21 15:58:39,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112584001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:39,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:39,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:39,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864404255] [2024-06-21 15:58:39,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:39,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:39,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:39,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:39,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:39,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:39,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 97 transitions, 819 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:39,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:39,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:39,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:39,629 INFO L124 PetriNetUnfolderBase]: 1018/1763 cut-off events. [2024-06-21 15:58:39,630 INFO L125 PetriNetUnfolderBase]: For 12829/12829 co-relation queries the response was YES. [2024-06-21 15:58:39,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7971 conditions, 1763 events. 1018/1763 cut-off events. For 12829/12829 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 9581 event pairs, 301 based on Foata normal form. 3/1761 useless extension candidates. Maximal degree in co-relation 7936. Up to 1392 conditions per place. [2024-06-21 15:58:39,641 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 78 selfloop transitions, 35 changer transitions 0/123 dead transitions. [2024-06-21 15:58:39,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 123 transitions, 1208 flow [2024-06-21 15:58:39,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:39,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:39,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-21 15:58:39,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6550387596899225 [2024-06-21 15:58:39,643 INFO L175 Difference]: Start difference. First operand has 82 places, 97 transitions, 819 flow. Second operand 6 states and 169 transitions. [2024-06-21 15:58:39,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 123 transitions, 1208 flow [2024-06-21 15:58:39,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 123 transitions, 1131 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 15:58:39,654 INFO L231 Difference]: Finished difference. Result has 84 places, 101 transitions, 866 flow [2024-06-21 15:58:39,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=866, PETRI_PLACES=84, PETRI_TRANSITIONS=101} [2024-06-21 15:58:39,655 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2024-06-21 15:58:39,655 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 101 transitions, 866 flow [2024-06-21 15:58:39,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:39,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:39,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:39,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 15:58:39,656 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:39,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:39,656 INFO L85 PathProgramCache]: Analyzing trace with hash -469113726, now seen corresponding path program 3 times [2024-06-21 15:58:39,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:39,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306567810] [2024-06-21 15:58:39,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:39,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:39,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:39,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:39,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306567810] [2024-06-21 15:58:39,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306567810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:39,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:39,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:39,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386778667] [2024-06-21 15:58:39,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:39,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:39,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:39,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:39,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:39,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:39,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 101 transitions, 866 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:39,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:39,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:39,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:39,972 INFO L124 PetriNetUnfolderBase]: 1036/1822 cut-off events. [2024-06-21 15:58:39,972 INFO L125 PetriNetUnfolderBase]: For 14195/14195 co-relation queries the response was YES. [2024-06-21 15:58:39,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8326 conditions, 1822 events. 1036/1822 cut-off events. For 14195/14195 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10110 event pairs, 316 based on Foata normal form. 3/1824 useless extension candidates. Maximal degree in co-relation 8290. Up to 1519 conditions per place. [2024-06-21 15:58:39,984 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 103 selfloop transitions, 18 changer transitions 0/131 dead transitions. [2024-06-21 15:58:39,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 131 transitions, 1279 flow [2024-06-21 15:58:39,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:58:39,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:58:39,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 15:58:39,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-21 15:58:39,986 INFO L175 Difference]: Start difference. First operand has 84 places, 101 transitions, 866 flow. Second operand 7 states and 182 transitions. [2024-06-21 15:58:39,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 131 transitions, 1279 flow [2024-06-21 15:58:40,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 131 transitions, 1176 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 15:58:40,006 INFO L231 Difference]: Finished difference. Result has 90 places, 110 transitions, 930 flow [2024-06-21 15:58:40,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=930, PETRI_PLACES=90, PETRI_TRANSITIONS=110} [2024-06-21 15:58:40,006 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 46 predicate places. [2024-06-21 15:58:40,007 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 110 transitions, 930 flow [2024-06-21 15:58:40,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:40,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:40,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:40,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 15:58:40,007 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:40,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:40,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1478028510, now seen corresponding path program 1 times [2024-06-21 15:58:40,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:40,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025563465] [2024-06-21 15:58:40,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:40,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:40,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:40,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:40,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:40,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025563465] [2024-06-21 15:58:40,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025563465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:40,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:40,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:40,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614648013] [2024-06-21 15:58:40,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:40,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:40,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:40,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:40,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:40,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-06-21 15:58:40,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 110 transitions, 930 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 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) [2024-06-21 15:58:40,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:40,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-06-21 15:58:40,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:40,339 INFO L124 PetriNetUnfolderBase]: 969/1747 cut-off events. [2024-06-21 15:58:40,339 INFO L125 PetriNetUnfolderBase]: For 15325/15325 co-relation queries the response was YES. [2024-06-21 15:58:40,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8017 conditions, 1747 events. 969/1747 cut-off events. For 15325/15325 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9861 event pairs, 275 based on Foata normal form. 4/1750 useless extension candidates. Maximal degree in co-relation 7978. Up to 1344 conditions per place. [2024-06-21 15:58:40,351 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 91 selfloop transitions, 12 changer transitions 0/132 dead transitions. [2024-06-21 15:58:40,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 132 transitions, 1216 flow [2024-06-21 15:58:40,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:40,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:40,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-21 15:58:40,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6317829457364341 [2024-06-21 15:58:40,352 INFO L175 Difference]: Start difference. First operand has 90 places, 110 transitions, 930 flow. Second operand 6 states and 163 transitions. [2024-06-21 15:58:40,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 132 transitions, 1216 flow [2024-06-21 15:58:40,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 132 transitions, 1158 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 15:58:40,374 INFO L231 Difference]: Finished difference. Result has 93 places, 112 transitions, 937 flow [2024-06-21 15:58:40,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=937, PETRI_PLACES=93, PETRI_TRANSITIONS=112} [2024-06-21 15:58:40,375 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-21 15:58:40,375 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 112 transitions, 937 flow [2024-06-21 15:58:40,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 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) [2024-06-21 15:58:40,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:40,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:40,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 15:58:40,376 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:40,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:40,376 INFO L85 PathProgramCache]: Analyzing trace with hash 688238411, now seen corresponding path program 1 times [2024-06-21 15:58:40,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:40,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423486822] [2024-06-21 15:58:40,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:40,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:40,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:40,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:40,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:40,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423486822] [2024-06-21 15:58:40,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423486822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:40,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:40,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:58:40,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615812932] [2024-06-21 15:58:40,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:40,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:58:40,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:40,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:58:40,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:58:40,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:40,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 112 transitions, 937 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:40,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:40,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:40,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:40,622 INFO L124 PetriNetUnfolderBase]: 1038/1817 cut-off events. [2024-06-21 15:58:40,622 INFO L125 PetriNetUnfolderBase]: For 17224/17224 co-relation queries the response was YES. [2024-06-21 15:58:40,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8507 conditions, 1817 events. 1038/1817 cut-off events. For 17224/17224 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10052 event pairs, 320 based on Foata normal form. 2/1814 useless extension candidates. Maximal degree in co-relation 8467. Up to 1484 conditions per place. [2024-06-21 15:58:40,634 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 94 selfloop transitions, 25 changer transitions 0/129 dead transitions. [2024-06-21 15:58:40,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 129 transitions, 1288 flow [2024-06-21 15:58:40,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:58:40,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:58:40,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-06-21 15:58:40,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6325581395348837 [2024-06-21 15:58:40,636 INFO L175 Difference]: Start difference. First operand has 93 places, 112 transitions, 937 flow. Second operand 5 states and 136 transitions. [2024-06-21 15:58:40,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 129 transitions, 1288 flow [2024-06-21 15:58:40,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 129 transitions, 1241 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 15:58:40,658 INFO L231 Difference]: Finished difference. Result has 94 places, 116 transitions, 1004 flow [2024-06-21 15:58:40,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1004, PETRI_PLACES=94, PETRI_TRANSITIONS=116} [2024-06-21 15:58:40,659 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 50 predicate places. [2024-06-21 15:58:40,659 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 116 transitions, 1004 flow [2024-06-21 15:58:40,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:40,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:40,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:40,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 15:58:40,660 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:40,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:40,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1940956425, now seen corresponding path program 2 times [2024-06-21 15:58:40,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:40,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901483405] [2024-06-21 15:58:40,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:40,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:40,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:40,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:40,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901483405] [2024-06-21 15:58:40,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901483405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:40,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:40,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:58:40,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549948604] [2024-06-21 15:58:40,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:40,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:58:40,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:40,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:58:40,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:58:40,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:40,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 116 transitions, 1004 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:40,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:40,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:40,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:40,955 INFO L124 PetriNetUnfolderBase]: 1026/1789 cut-off events. [2024-06-21 15:58:40,956 INFO L125 PetriNetUnfolderBase]: For 18748/18748 co-relation queries the response was YES. [2024-06-21 15:58:40,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8475 conditions, 1789 events. 1026/1789 cut-off events. For 18748/18748 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9847 event pairs, 332 based on Foata normal form. 2/1786 useless extension candidates. Maximal degree in co-relation 8434. Up to 1470 conditions per place. [2024-06-21 15:58:40,969 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 88 selfloop transitions, 27 changer transitions 0/125 dead transitions. [2024-06-21 15:58:40,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 125 transitions, 1256 flow [2024-06-21 15:58:40,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:58:40,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:58:40,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-21 15:58:40,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6186046511627907 [2024-06-21 15:58:40,970 INFO L175 Difference]: Start difference. First operand has 94 places, 116 transitions, 1004 flow. Second operand 5 states and 133 transitions. [2024-06-21 15:58:40,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 125 transitions, 1256 flow [2024-06-21 15:58:40,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 125 transitions, 1218 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-21 15:58:40,996 INFO L231 Difference]: Finished difference. Result has 97 places, 116 transitions, 1027 flow [2024-06-21 15:58:40,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1027, PETRI_PLACES=97, PETRI_TRANSITIONS=116} [2024-06-21 15:58:40,997 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-06-21 15:58:40,997 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 116 transitions, 1027 flow [2024-06-21 15:58:40,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:40,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:40,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:40,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 15:58:40,998 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:40,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:40,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1415259959, now seen corresponding path program 1 times [2024-06-21 15:58:40,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:40,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117490669] [2024-06-21 15:58:40,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:40,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:41,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:41,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:41,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117490669] [2024-06-21 15:58:41,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117490669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:41,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:41,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:58:41,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802416927] [2024-06-21 15:58:41,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:41,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:58:41,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:41,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:58:41,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:58:41,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-06-21 15:58:41,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 116 transitions, 1027 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:41,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:41,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-06-21 15:58:41,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:41,254 INFO L124 PetriNetUnfolderBase]: 971/1732 cut-off events. [2024-06-21 15:58:41,254 INFO L125 PetriNetUnfolderBase]: For 19963/19963 co-relation queries the response was YES. [2024-06-21 15:58:41,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8266 conditions, 1732 events. 971/1732 cut-off events. For 19963/19963 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 9738 event pairs, 317 based on Foata normal form. 3/1725 useless extension candidates. Maximal degree in co-relation 8224. Up to 1361 conditions per place. [2024-06-21 15:58:41,266 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 89 selfloop transitions, 21 changer transitions 0/133 dead transitions. [2024-06-21 15:58:41,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 133 transitions, 1353 flow [2024-06-21 15:58:41,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:58:41,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:58:41,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-21 15:58:41,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6372093023255814 [2024-06-21 15:58:41,268 INFO L175 Difference]: Start difference. First operand has 97 places, 116 transitions, 1027 flow. Second operand 5 states and 137 transitions. [2024-06-21 15:58:41,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 133 transitions, 1353 flow [2024-06-21 15:58:41,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 133 transitions, 1255 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 15:58:41,290 INFO L231 Difference]: Finished difference. Result has 96 places, 123 transitions, 1037 flow [2024-06-21 15:58:41,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=929, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1037, PETRI_PLACES=96, PETRI_TRANSITIONS=123} [2024-06-21 15:58:41,291 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 52 predicate places. [2024-06-21 15:58:41,291 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 123 transitions, 1037 flow [2024-06-21 15:58:41,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:41,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:41,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:41,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 15:58:41,292 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:41,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:41,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1518304931, now seen corresponding path program 1 times [2024-06-21 15:58:41,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:41,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052720758] [2024-06-21 15:58:41,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:41,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:41,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:41,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:41,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:41,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052720758] [2024-06-21 15:58:41,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052720758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:41,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:41,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:41,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965673366] [2024-06-21 15:58:41,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:41,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:41,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:41,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:41,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:41,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:41,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 123 transitions, 1037 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:41,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:41,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:41,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:41,707 INFO L124 PetriNetUnfolderBase]: 1096/1887 cut-off events. [2024-06-21 15:58:41,708 INFO L125 PetriNetUnfolderBase]: For 23886/23886 co-relation queries the response was YES. [2024-06-21 15:58:41,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9449 conditions, 1887 events. 1096/1887 cut-off events. For 23886/23886 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10417 event pairs, 203 based on Foata normal form. 6/1889 useless extension candidates. Maximal degree in co-relation 9408. Up to 1491 conditions per place. [2024-06-21 15:58:41,720 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 126 selfloop transitions, 30 changer transitions 0/166 dead transitions. [2024-06-21 15:58:41,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 166 transitions, 1585 flow [2024-06-21 15:58:41,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:41,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:41,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-21 15:58:41,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6482558139534884 [2024-06-21 15:58:41,722 INFO L175 Difference]: Start difference. First operand has 96 places, 123 transitions, 1037 flow. Second operand 8 states and 223 transitions. [2024-06-21 15:58:41,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 166 transitions, 1585 flow [2024-06-21 15:58:41,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 166 transitions, 1552 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-21 15:58:41,755 INFO L231 Difference]: Finished difference. Result has 103 places, 129 transitions, 1162 flow [2024-06-21 15:58:41,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1004, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1162, PETRI_PLACES=103, PETRI_TRANSITIONS=129} [2024-06-21 15:58:41,756 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 59 predicate places. [2024-06-21 15:58:41,756 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 129 transitions, 1162 flow [2024-06-21 15:58:41,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:41,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:41,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:41,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 15:58:41,757 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:41,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:41,757 INFO L85 PathProgramCache]: Analyzing trace with hash 30643589, now seen corresponding path program 2 times [2024-06-21 15:58:41,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:41,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690825850] [2024-06-21 15:58:41,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:41,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:41,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:41,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:41,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690825850] [2024-06-21 15:58:41,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690825850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:41,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:41,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:41,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976808568] [2024-06-21 15:58:41,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:41,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:41,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:41,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:41,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:41,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:41,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 129 transitions, 1162 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:41,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:41,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:41,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:42,181 INFO L124 PetriNetUnfolderBase]: 1083/1868 cut-off events. [2024-06-21 15:58:42,181 INFO L125 PetriNetUnfolderBase]: For 26219/26219 co-relation queries the response was YES. [2024-06-21 15:58:42,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9685 conditions, 1868 events. 1083/1868 cut-off events. For 26219/26219 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10310 event pairs, 288 based on Foata normal form. 6/1870 useless extension candidates. Maximal degree in co-relation 9641. Up to 1548 conditions per place. [2024-06-21 15:58:42,196 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 125 selfloop transitions, 24 changer transitions 0/159 dead transitions. [2024-06-21 15:58:42,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 159 transitions, 1536 flow [2024-06-21 15:58:42,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:58:42,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:58:42,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-21 15:58:42,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6478405315614618 [2024-06-21 15:58:42,198 INFO L175 Difference]: Start difference. First operand has 103 places, 129 transitions, 1162 flow. Second operand 7 states and 195 transitions. [2024-06-21 15:58:42,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 159 transitions, 1536 flow [2024-06-21 15:58:42,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 159 transitions, 1441 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-21 15:58:42,228 INFO L231 Difference]: Finished difference. Result has 106 places, 129 transitions, 1123 flow [2024-06-21 15:58:42,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1067, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1123, PETRI_PLACES=106, PETRI_TRANSITIONS=129} [2024-06-21 15:58:42,228 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 62 predicate places. [2024-06-21 15:58:42,228 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 129 transitions, 1123 flow [2024-06-21 15:58:42,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:42,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:42,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:42,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 15:58:42,229 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:42,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:42,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1376976669, now seen corresponding path program 1 times [2024-06-21 15:58:42,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:42,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462207461] [2024-06-21 15:58:42,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:42,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:42,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:42,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:42,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:42,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462207461] [2024-06-21 15:58:42,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462207461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:42,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:42,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:42,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584144713] [2024-06-21 15:58:42,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:42,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:42,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:42,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:42,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:42,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:42,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 129 transitions, 1123 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:42,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:42,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:42,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:42,599 INFO L124 PetriNetUnfolderBase]: 1099/1896 cut-off events. [2024-06-21 15:58:42,599 INFO L125 PetriNetUnfolderBase]: For 27917/27917 co-relation queries the response was YES. [2024-06-21 15:58:42,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9845 conditions, 1896 events. 1099/1896 cut-off events. For 27917/27917 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10521 event pairs, 273 based on Foata normal form. 3/1895 useless extension candidates. Maximal degree in co-relation 9799. Up to 1583 conditions per place. [2024-06-21 15:58:42,614 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 127 selfloop transitions, 25 changer transitions 0/162 dead transitions. [2024-06-21 15:58:42,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 162 transitions, 1555 flow [2024-06-21 15:58:42,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:58:42,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:58:42,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-21 15:58:42,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6478405315614618 [2024-06-21 15:58:42,617 INFO L175 Difference]: Start difference. First operand has 106 places, 129 transitions, 1123 flow. Second operand 7 states and 195 transitions. [2024-06-21 15:58:42,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 162 transitions, 1555 flow [2024-06-21 15:58:42,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 162 transitions, 1499 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 15:58:42,649 INFO L231 Difference]: Finished difference. Result has 107 places, 133 transitions, 1188 flow [2024-06-21 15:58:42,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1067, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1188, PETRI_PLACES=107, PETRI_TRANSITIONS=133} [2024-06-21 15:58:42,650 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-21 15:58:42,650 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 133 transitions, 1188 flow [2024-06-21 15:58:42,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:42,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:42,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:42,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 15:58:42,651 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:42,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:42,651 INFO L85 PathProgramCache]: Analyzing trace with hash -882242465, now seen corresponding path program 3 times [2024-06-21 15:58:42,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:42,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218065484] [2024-06-21 15:58:42,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:42,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:42,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:42,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:42,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218065484] [2024-06-21 15:58:42,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218065484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:42,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:42,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:42,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165477760] [2024-06-21 15:58:42,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:42,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:42,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:42,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:42,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:42,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:42,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 133 transitions, 1188 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:42,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:42,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:42,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:43,002 INFO L124 PetriNetUnfolderBase]: 1124/1929 cut-off events. [2024-06-21 15:58:43,003 INFO L125 PetriNetUnfolderBase]: For 31684/31684 co-relation queries the response was YES. [2024-06-21 15:58:43,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10410 conditions, 1929 events. 1124/1929 cut-off events. For 31684/31684 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10636 event pairs, 281 based on Foata normal form. 6/1927 useless extension candidates. Maximal degree in co-relation 10363. Up to 1523 conditions per place. [2024-06-21 15:58:43,018 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 108 selfloop transitions, 46 changer transitions 0/164 dead transitions. [2024-06-21 15:58:43,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 164 transitions, 1658 flow [2024-06-21 15:58:43,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:58:43,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:58:43,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-21 15:58:43,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.654485049833887 [2024-06-21 15:58:43,019 INFO L175 Difference]: Start difference. First operand has 107 places, 133 transitions, 1188 flow. Second operand 7 states and 197 transitions. [2024-06-21 15:58:43,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 164 transitions, 1658 flow [2024-06-21 15:58:43,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 164 transitions, 1567 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 15:58:43,054 INFO L231 Difference]: Finished difference. Result has 109 places, 136 transitions, 1255 flow [2024-06-21 15:58:43,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1097, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1255, PETRI_PLACES=109, PETRI_TRANSITIONS=136} [2024-06-21 15:58:43,092 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 65 predicate places. [2024-06-21 15:58:43,092 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 136 transitions, 1255 flow [2024-06-21 15:58:43,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:43,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:43,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:43,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 15:58:43,092 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:43,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:43,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1657906973, now seen corresponding path program 2 times [2024-06-21 15:58:43,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:43,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676372097] [2024-06-21 15:58:43,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:43,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:43,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:43,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:43,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:43,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676372097] [2024-06-21 15:58:43,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676372097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:43,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:43,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:43,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266230304] [2024-06-21 15:58:43,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:43,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:43,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:43,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:43,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:43,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:43,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 136 transitions, 1255 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:43,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:43,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:43,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:43,426 INFO L124 PetriNetUnfolderBase]: 1172/2009 cut-off events. [2024-06-21 15:58:43,426 INFO L125 PetriNetUnfolderBase]: For 36047/36047 co-relation queries the response was YES. [2024-06-21 15:58:43,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11253 conditions, 2009 events. 1172/2009 cut-off events. For 36047/36047 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11209 event pairs, 286 based on Foata normal form. 3/2000 useless extension candidates. Maximal degree in co-relation 11205. Up to 1447 conditions per place. [2024-06-21 15:58:43,440 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 98 selfloop transitions, 74 changer transitions 0/182 dead transitions. [2024-06-21 15:58:43,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 182 transitions, 2107 flow [2024-06-21 15:58:43,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:58:43,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:58:43,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-21 15:58:43,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6810631229235881 [2024-06-21 15:58:43,441 INFO L175 Difference]: Start difference. First operand has 109 places, 136 transitions, 1255 flow. Second operand 7 states and 205 transitions. [2024-06-21 15:58:43,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 182 transitions, 2107 flow [2024-06-21 15:58:43,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 182 transitions, 1973 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 15:58:43,479 INFO L231 Difference]: Finished difference. Result has 111 places, 151 transitions, 1524 flow [2024-06-21 15:58:43,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1121, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1524, PETRI_PLACES=111, PETRI_TRANSITIONS=151} [2024-06-21 15:58:43,480 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 67 predicate places. [2024-06-21 15:58:43,480 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 151 transitions, 1524 flow [2024-06-21 15:58:43,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:43,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:43,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:43,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 15:58:43,480 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:43,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:43,481 INFO L85 PathProgramCache]: Analyzing trace with hash 377344387, now seen corresponding path program 3 times [2024-06-21 15:58:43,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:43,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622722175] [2024-06-21 15:58:43,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:43,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:43,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:43,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:43,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:43,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622722175] [2024-06-21 15:58:43,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622722175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:43,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:43,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:43,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499257440] [2024-06-21 15:58:43,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:43,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:43,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:43,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:43,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:43,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:43,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 151 transitions, 1524 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:43,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:43,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:43,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:43,819 INFO L124 PetriNetUnfolderBase]: 1164/1998 cut-off events. [2024-06-21 15:58:43,819 INFO L125 PetriNetUnfolderBase]: For 38924/38924 co-relation queries the response was YES. [2024-06-21 15:58:43,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11467 conditions, 1998 events. 1164/1998 cut-off events. For 38924/38924 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11230 event pairs, 286 based on Foata normal form. 3/1989 useless extension candidates. Maximal degree in co-relation 11418. Up to 1440 conditions per place. [2024-06-21 15:58:43,833 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 95 selfloop transitions, 75 changer transitions 0/180 dead transitions. [2024-06-21 15:58:43,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 180 transitions, 2060 flow [2024-06-21 15:58:43,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:58:43,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:58:43,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-21 15:58:43,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6710963455149501 [2024-06-21 15:58:43,835 INFO L175 Difference]: Start difference. First operand has 111 places, 151 transitions, 1524 flow. Second operand 7 states and 202 transitions. [2024-06-21 15:58:43,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 180 transitions, 2060 flow [2024-06-21 15:58:43,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 180 transitions, 1934 flow, removed 55 selfloop flow, removed 1 redundant places. [2024-06-21 15:58:43,879 INFO L231 Difference]: Finished difference. Result has 117 places, 151 transitions, 1557 flow [2024-06-21 15:58:43,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1398, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1557, PETRI_PLACES=117, PETRI_TRANSITIONS=151} [2024-06-21 15:58:43,879 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 73 predicate places. [2024-06-21 15:58:43,880 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 151 transitions, 1557 flow [2024-06-21 15:58:43,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:43,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:43,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:43,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 15:58:43,881 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)] === [2024-06-21 15:58:43,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:43,881 INFO L85 PathProgramCache]: Analyzing trace with hash 377353315, now seen corresponding path program 1 times [2024-06-21 15:58:43,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:43,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126101854] [2024-06-21 15:58:43,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:43,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:43,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:43,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:43,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:43,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126101854] [2024-06-21 15:58:43,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126101854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:43,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:43,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:43,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867596717] [2024-06-21 15:58:43,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:43,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:43,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:43,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:43,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:44,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:44,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 151 transitions, 1557 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:44,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:44,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:44,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:44,241 INFO L124 PetriNetUnfolderBase]: 1189/2031 cut-off events. [2024-06-21 15:58:44,241 INFO L125 PetriNetUnfolderBase]: For 43289/43289 co-relation queries the response was YES. [2024-06-21 15:58:44,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11921 conditions, 2031 events. 1189/2031 cut-off events. For 43289/43289 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11354 event pairs, 281 based on Foata normal form. 6/2026 useless extension candidates. Maximal degree in co-relation 11869. Up to 1617 conditions per place. [2024-06-21 15:58:44,255 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 122 selfloop transitions, 51 changer transitions 0/183 dead transitions. [2024-06-21 15:58:44,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 183 transitions, 2123 flow [2024-06-21 15:58:44,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:58:44,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:58:44,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-21 15:58:44,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.654485049833887 [2024-06-21 15:58:44,256 INFO L175 Difference]: Start difference. First operand has 117 places, 151 transitions, 1557 flow. Second operand 7 states and 197 transitions. [2024-06-21 15:58:44,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 183 transitions, 2123 flow [2024-06-21 15:58:44,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 183 transitions, 1994 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 15:58:44,306 INFO L231 Difference]: Finished difference. Result has 119 places, 154 transitions, 1600 flow [2024-06-21 15:58:44,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1428, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1600, PETRI_PLACES=119, PETRI_TRANSITIONS=154} [2024-06-21 15:58:44,306 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 75 predicate places. [2024-06-21 15:58:44,307 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 154 transitions, 1600 flow [2024-06-21 15:58:44,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:44,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:44,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:44,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 15:58:44,307 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)] === [2024-06-21 15:58:44,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:44,308 INFO L85 PathProgramCache]: Analyzing trace with hash -20823407, now seen corresponding path program 4 times [2024-06-21 15:58:44,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:44,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367220334] [2024-06-21 15:58:44,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:44,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:44,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:44,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:44,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:44,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367220334] [2024-06-21 15:58:44,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367220334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:44,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:44,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:44,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087937973] [2024-06-21 15:58:44,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:44,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:44,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:44,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:44,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:44,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:44,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 154 transitions, 1600 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:44,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:44,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:44,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:44,691 INFO L124 PetriNetUnfolderBase]: 1189/2057 cut-off events. [2024-06-21 15:58:44,692 INFO L125 PetriNetUnfolderBase]: For 45046/45046 co-relation queries the response was YES. [2024-06-21 15:58:44,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12094 conditions, 2057 events. 1189/2057 cut-off events. For 45046/45046 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11600 event pairs, 279 based on Foata normal form. 6/2055 useless extension candidates. Maximal degree in co-relation 12041. Up to 1619 conditions per place. [2024-06-21 15:58:44,707 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 130 selfloop transitions, 42 changer transitions 0/182 dead transitions. [2024-06-21 15:58:44,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 182 transitions, 2120 flow [2024-06-21 15:58:44,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:58:44,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:58:44,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-21 15:58:44,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6378737541528239 [2024-06-21 15:58:44,708 INFO L175 Difference]: Start difference. First operand has 119 places, 154 transitions, 1600 flow. Second operand 7 states and 192 transitions. [2024-06-21 15:58:44,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 182 transitions, 2120 flow [2024-06-21 15:58:44,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 182 transitions, 1972 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 15:58:44,749 INFO L231 Difference]: Finished difference. Result has 121 places, 157 transitions, 1616 flow [2024-06-21 15:58:44,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1452, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1616, PETRI_PLACES=121, PETRI_TRANSITIONS=157} [2024-06-21 15:58:44,750 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 77 predicate places. [2024-06-21 15:58:44,750 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 157 transitions, 1616 flow [2024-06-21 15:58:44,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:44,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:44,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:44,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 15:58:44,751 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)] === [2024-06-21 15:58:44,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:44,751 INFO L85 PathProgramCache]: Analyzing trace with hash -905898211, now seen corresponding path program 4 times [2024-06-21 15:58:44,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:44,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271376370] [2024-06-21 15:58:44,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:44,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:44,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:44,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:44,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:44,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271376370] [2024-06-21 15:58:44,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271376370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:44,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:44,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:44,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544720449] [2024-06-21 15:58:44,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:44,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:44,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:44,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:44,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:44,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:44,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 157 transitions, 1616 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:44,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:44,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:44,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:45,107 INFO L124 PetriNetUnfolderBase]: 1229/2130 cut-off events. [2024-06-21 15:58:45,107 INFO L125 PetriNetUnfolderBase]: For 49316/49316 co-relation queries the response was YES. [2024-06-21 15:58:45,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12707 conditions, 2130 events. 1229/2130 cut-off events. For 49316/49316 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12035 event pairs, 274 based on Foata normal form. 3/2125 useless extension candidates. Maximal degree in co-relation 12653. Up to 1518 conditions per place. [2024-06-21 15:58:45,123 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 109 selfloop transitions, 74 changer transitions 0/193 dead transitions. [2024-06-21 15:58:45,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 193 transitions, 2440 flow [2024-06-21 15:58:45,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:58:45,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:58:45,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-21 15:58:45,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6644518272425249 [2024-06-21 15:58:45,125 INFO L175 Difference]: Start difference. First operand has 121 places, 157 transitions, 1616 flow. Second operand 7 states and 200 transitions. [2024-06-21 15:58:45,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 193 transitions, 2440 flow [2024-06-21 15:58:45,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 193 transitions, 2300 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 15:58:45,174 INFO L231 Difference]: Finished difference. Result has 123 places, 165 transitions, 1789 flow [2024-06-21 15:58:45,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1476, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1789, PETRI_PLACES=123, PETRI_TRANSITIONS=165} [2024-06-21 15:58:45,175 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 79 predicate places. [2024-06-21 15:58:45,175 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 165 transitions, 1789 flow [2024-06-21 15:58:45,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:45,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:45,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:45,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 15:58:45,175 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:45,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:45,176 INFO L85 PathProgramCache]: Analyzing trace with hash -912564451, now seen corresponding path program 5 times [2024-06-21 15:58:45,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:45,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870426591] [2024-06-21 15:58:45,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:45,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:45,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:45,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:45,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870426591] [2024-06-21 15:58:45,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870426591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:45,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:45,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:45,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954582641] [2024-06-21 15:58:45,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:45,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:45,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:45,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:45,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:45,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:45,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 165 transitions, 1789 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:45,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:45,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:45,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:45,518 INFO L124 PetriNetUnfolderBase]: 1221/2119 cut-off events. [2024-06-21 15:58:45,518 INFO L125 PetriNetUnfolderBase]: For 51026/51026 co-relation queries the response was YES. [2024-06-21 15:58:45,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12676 conditions, 2119 events. 1221/2119 cut-off events. For 51026/51026 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12031 event pairs, 274 based on Foata normal form. 3/2114 useless extension candidates. Maximal degree in co-relation 12621. Up to 1511 conditions per place. [2024-06-21 15:58:45,534 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 106 selfloop transitions, 76 changer transitions 0/192 dead transitions. [2024-06-21 15:58:45,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 192 transitions, 2419 flow [2024-06-21 15:58:45,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:58:45,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:58:45,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-21 15:58:45,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6578073089700996 [2024-06-21 15:58:45,535 INFO L175 Difference]: Start difference. First operand has 123 places, 165 transitions, 1789 flow. Second operand 7 states and 198 transitions. [2024-06-21 15:58:45,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 192 transitions, 2419 flow [2024-06-21 15:58:45,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 192 transitions, 2148 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-21 15:58:45,587 INFO L231 Difference]: Finished difference. Result has 126 places, 165 transitions, 1679 flow [2024-06-21 15:58:45,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1518, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1679, PETRI_PLACES=126, PETRI_TRANSITIONS=165} [2024-06-21 15:58:45,587 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2024-06-21 15:58:45,587 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 165 transitions, 1679 flow [2024-06-21 15:58:45,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:45,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:45,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:45,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 15:58:45,588 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)] === [2024-06-21 15:58:45,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:45,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1259217123, now seen corresponding path program 6 times [2024-06-21 15:58:45,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:45,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871777375] [2024-06-21 15:58:45,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:45,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:45,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:45,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:45,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:45,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871777375] [2024-06-21 15:58:45,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871777375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:45,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:45,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:45,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583626465] [2024-06-21 15:58:45,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:45,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:45,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:45,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:45,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:45,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:45,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 165 transitions, 1679 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:45,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:45,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:45,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:45,944 INFO L124 PetriNetUnfolderBase]: 1231/2149 cut-off events. [2024-06-21 15:58:45,944 INFO L125 PetriNetUnfolderBase]: For 52392/52392 co-relation queries the response was YES. [2024-06-21 15:58:45,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12728 conditions, 2149 events. 1231/2149 cut-off events. For 52392/52392 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12217 event pairs, 260 based on Foata normal form. 3/2151 useless extension candidates. Maximal degree in co-relation 12672. Up to 1790 conditions per place. [2024-06-21 15:58:45,960 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 162 selfloop transitions, 24 changer transitions 0/196 dead transitions. [2024-06-21 15:58:45,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 196 transitions, 2260 flow [2024-06-21 15:58:45,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:45,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:45,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-21 15:58:45,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-21 15:58:45,962 INFO L175 Difference]: Start difference. First operand has 126 places, 165 transitions, 1679 flow. Second operand 8 states and 208 transitions. [2024-06-21 15:58:45,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 196 transitions, 2260 flow [2024-06-21 15:58:46,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 196 transitions, 2088 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 15:58:46,016 INFO L231 Difference]: Finished difference. Result has 130 places, 171 transitions, 1678 flow [2024-06-21 15:58:46,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1522, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1678, PETRI_PLACES=130, PETRI_TRANSITIONS=171} [2024-06-21 15:58:46,017 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 86 predicate places. [2024-06-21 15:58:46,017 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 171 transitions, 1678 flow [2024-06-21 15:58:46,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:46,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:46,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:46,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 15:58:46,018 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)] === [2024-06-21 15:58:46,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:46,018 INFO L85 PathProgramCache]: Analyzing trace with hash -905889283, now seen corresponding path program 2 times [2024-06-21 15:58:46,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:46,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530032801] [2024-06-21 15:58:46,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:46,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:46,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:46,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:46,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:46,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530032801] [2024-06-21 15:58:46,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530032801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:46,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:46,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:46,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031342805] [2024-06-21 15:58:46,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:46,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:46,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:46,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:46,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:46,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:46,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 171 transitions, 1678 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:46,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:46,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:46,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:46,391 INFO L124 PetriNetUnfolderBase]: 1256/2182 cut-off events. [2024-06-21 15:58:46,391 INFO L125 PetriNetUnfolderBase]: For 56884/56884 co-relation queries the response was YES. [2024-06-21 15:58:46,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12875 conditions, 2182 events. 1256/2182 cut-off events. For 56884/56884 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12376 event pairs, 267 based on Foata normal form. 6/2183 useless extension candidates. Maximal degree in co-relation 12817. Up to 1716 conditions per place. [2024-06-21 15:58:46,408 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 142 selfloop transitions, 48 changer transitions 0/200 dead transitions. [2024-06-21 15:58:46,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 200 transitions, 2300 flow [2024-06-21 15:58:46,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:58:46,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:58:46,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-21 15:58:46,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6411960132890365 [2024-06-21 15:58:46,409 INFO L175 Difference]: Start difference. First operand has 130 places, 171 transitions, 1678 flow. Second operand 7 states and 193 transitions. [2024-06-21 15:58:46,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 200 transitions, 2300 flow [2024-06-21 15:58:46,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 200 transitions, 2220 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 15:58:46,476 INFO L231 Difference]: Finished difference. Result has 132 places, 174 transitions, 1774 flow [2024-06-21 15:58:46,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1598, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1774, PETRI_PLACES=132, PETRI_TRANSITIONS=174} [2024-06-21 15:58:46,477 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 88 predicate places. [2024-06-21 15:58:46,477 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 174 transitions, 1774 flow [2024-06-21 15:58:46,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:46,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:46,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:46,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 15:58:46,477 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)] === [2024-06-21 15:58:46,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:46,478 INFO L85 PathProgramCache]: Analyzing trace with hash 407387811, now seen corresponding path program 3 times [2024-06-21 15:58:46,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:46,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017443705] [2024-06-21 15:58:46,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:46,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:46,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:46,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:46,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017443705] [2024-06-21 15:58:46,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017443705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:46,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:46,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:46,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717183613] [2024-06-21 15:58:46,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:46,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:46,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:46,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:46,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:46,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:46,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 174 transitions, 1774 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:46,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:46,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:46,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:46,891 INFO L124 PetriNetUnfolderBase]: 1284/2242 cut-off events. [2024-06-21 15:58:46,891 INFO L125 PetriNetUnfolderBase]: For 61966/61966 co-relation queries the response was YES. [2024-06-21 15:58:46,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13514 conditions, 2242 events. 1284/2242 cut-off events. For 61966/61966 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12813 event pairs, 265 based on Foata normal form. 6/2247 useless extension candidates. Maximal degree in co-relation 13455. Up to 1867 conditions per place. [2024-06-21 15:58:46,908 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 172 selfloop transitions, 21 changer transitions 0/203 dead transitions. [2024-06-21 15:58:46,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 203 transitions, 2354 flow [2024-06-21 15:58:46,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:46,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:46,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-21 15:58:46,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6017441860465116 [2024-06-21 15:58:46,909 INFO L175 Difference]: Start difference. First operand has 132 places, 174 transitions, 1774 flow. Second operand 8 states and 207 transitions. [2024-06-21 15:58:46,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 203 transitions, 2354 flow [2024-06-21 15:58:47,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 203 transitions, 2202 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 15:58:47,015 INFO L231 Difference]: Finished difference. Result has 135 places, 177 transitions, 1750 flow [2024-06-21 15:58:47,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1622, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1750, PETRI_PLACES=135, PETRI_TRANSITIONS=177} [2024-06-21 15:58:47,015 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 91 predicate places. [2024-06-21 15:58:47,015 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 177 transitions, 1750 flow [2024-06-21 15:58:47,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:47,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:47,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:47,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 15:58:47,016 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)] === [2024-06-21 15:58:47,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:47,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1248732675, now seen corresponding path program 4 times [2024-06-21 15:58:47,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:47,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783240981] [2024-06-21 15:58:47,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:47,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:47,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:47,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:47,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:47,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783240981] [2024-06-21 15:58:47,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783240981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:47,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:47,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:47,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302195173] [2024-06-21 15:58:47,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:47,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:47,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:47,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:47,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:47,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:47,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 177 transitions, 1750 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:47,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:47,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:47,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:47,442 INFO L124 PetriNetUnfolderBase]: 1313/2295 cut-off events. [2024-06-21 15:58:47,442 INFO L125 PetriNetUnfolderBase]: For 65976/65976 co-relation queries the response was YES. [2024-06-21 15:58:47,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13956 conditions, 2295 events. 1313/2295 cut-off events. For 65976/65976 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13177 event pairs, 252 based on Foata normal form. 6/2300 useless extension candidates. Maximal degree in co-relation 13896. Up to 1826 conditions per place. [2024-06-21 15:58:47,459 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 179 selfloop transitions, 25 changer transitions 0/214 dead transitions. [2024-06-21 15:58:47,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 214 transitions, 2490 flow [2024-06-21 15:58:47,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:47,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:47,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-21 15:58:47,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6191860465116279 [2024-06-21 15:58:47,461 INFO L175 Difference]: Start difference. First operand has 135 places, 177 transitions, 1750 flow. Second operand 8 states and 213 transitions. [2024-06-21 15:58:47,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 214 transitions, 2490 flow [2024-06-21 15:58:47,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 214 transitions, 2386 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 15:58:47,533 INFO L231 Difference]: Finished difference. Result has 138 places, 183 transitions, 1859 flow [2024-06-21 15:58:47,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1646, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1859, PETRI_PLACES=138, PETRI_TRANSITIONS=183} [2024-06-21 15:58:47,534 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-21 15:58:47,534 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 183 transitions, 1859 flow [2024-06-21 15:58:47,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:47,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:47,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:47,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 15:58:47,535 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:47,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:47,535 INFO L85 PathProgramCache]: Analyzing trace with hash 2091555820, now seen corresponding path program 1 times [2024-06-21 15:58:47,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:47,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804569285] [2024-06-21 15:58:47,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:47,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:47,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:47,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804569285] [2024-06-21 15:58:47,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804569285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:47,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:47,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:58:47,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241731862] [2024-06-21 15:58:47,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:47,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:58:47,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:47,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:58:47,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:58:47,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-06-21 15:58:47,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 183 transitions, 1859 flow. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:47,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:47,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-06-21 15:58:47,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:47,913 INFO L124 PetriNetUnfolderBase]: 1238/2222 cut-off events. [2024-06-21 15:58:47,914 INFO L125 PetriNetUnfolderBase]: For 68812/68812 co-relation queries the response was YES. [2024-06-21 15:58:47,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13744 conditions, 2222 events. 1238/2222 cut-off events. For 68812/68812 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13103 event pairs, 279 based on Foata normal form. 2/2217 useless extension candidates. Maximal degree in co-relation 13682. Up to 1721 conditions per place. [2024-06-21 15:58:47,928 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 150 selfloop transitions, 24 changer transitions 0/202 dead transitions. [2024-06-21 15:58:47,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 202 transitions, 2333 flow [2024-06-21 15:58:47,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:58:47,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:58:47,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-21 15:58:47,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6651162790697674 [2024-06-21 15:58:47,930 INFO L175 Difference]: Start difference. First operand has 138 places, 183 transitions, 1859 flow. Second operand 5 states and 143 transitions. [2024-06-21 15:58:47,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 202 transitions, 2333 flow [2024-06-21 15:58:48,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 202 transitions, 2219 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-21 15:58:48,010 INFO L231 Difference]: Finished difference. Result has 139 places, 186 transitions, 1824 flow [2024-06-21 15:58:48,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1745, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1824, PETRI_PLACES=139, PETRI_TRANSITIONS=186} [2024-06-21 15:58:48,011 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-21 15:58:48,011 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 186 transitions, 1824 flow [2024-06-21 15:58:48,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:48,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:48,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:48,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 15:58:48,011 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:48,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:48,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1076681678, now seen corresponding path program 2 times [2024-06-21 15:58:48,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:48,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759061452] [2024-06-21 15:58:48,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:48,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:48,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:48,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:48,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759061452] [2024-06-21 15:58:48,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759061452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:48,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:48,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:48,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249987819] [2024-06-21 15:58:48,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:48,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:48,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:48,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:48,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:48,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-06-21 15:58:48,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 186 transitions, 1824 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 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) [2024-06-21 15:58:48,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:48,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-06-21 15:58:48,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:48,354 INFO L124 PetriNetUnfolderBase]: 1234/2199 cut-off events. [2024-06-21 15:58:48,354 INFO L125 PetriNetUnfolderBase]: For 68937/68937 co-relation queries the response was YES. [2024-06-21 15:58:48,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13468 conditions, 2199 events. 1234/2199 cut-off events. For 68937/68937 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12970 event pairs, 282 based on Foata normal form. 2/2191 useless extension candidates. Maximal degree in co-relation 13404. Up to 1716 conditions per place. [2024-06-21 15:58:48,372 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 144 selfloop transitions, 24 changer transitions 0/196 dead transitions. [2024-06-21 15:58:48,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 196 transitions, 2184 flow [2024-06-21 15:58:48,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:48,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:48,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-21 15:58:48,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2024-06-21 15:58:48,374 INFO L175 Difference]: Start difference. First operand has 139 places, 186 transitions, 1824 flow. Second operand 6 states and 158 transitions. [2024-06-21 15:58:48,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 196 transitions, 2184 flow [2024-06-21 15:58:48,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 196 transitions, 2120 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 15:58:48,479 INFO L231 Difference]: Finished difference. Result has 142 places, 186 transitions, 1814 flow [2024-06-21 15:58:48,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1760, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1814, PETRI_PLACES=142, PETRI_TRANSITIONS=186} [2024-06-21 15:58:48,480 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-21 15:58:48,480 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 186 transitions, 1814 flow [2024-06-21 15:58:48,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 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) [2024-06-21 15:58:48,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:48,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:48,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 15:58:48,481 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:48,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:48,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1676419622, now seen corresponding path program 1 times [2024-06-21 15:58:48,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:48,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100334506] [2024-06-21 15:58:48,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:48,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:48,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:48,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:48,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:48,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100334506] [2024-06-21 15:58:48,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100334506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:48,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:48,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:48,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123482251] [2024-06-21 15:58:48,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:48,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:48,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:48,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:48,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:48,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:48,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 186 transitions, 1814 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:48,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:48,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:48,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:48,865 INFO L124 PetriNetUnfolderBase]: 1304/2284 cut-off events. [2024-06-21 15:58:48,865 INFO L125 PetriNetUnfolderBase]: For 71298/71298 co-relation queries the response was YES. [2024-06-21 15:58:48,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13939 conditions, 2284 events. 1304/2284 cut-off events. For 71298/71298 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13135 event pairs, 271 based on Foata normal form. 2/2285 useless extension candidates. Maximal degree in co-relation 13875. Up to 1926 conditions per place. [2024-06-21 15:58:48,882 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 178 selfloop transitions, 18 changer transitions 0/206 dead transitions. [2024-06-21 15:58:48,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 206 transitions, 2256 flow [2024-06-21 15:58:48,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:58:48,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:58:48,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 15:58:48,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5980066445182725 [2024-06-21 15:58:48,883 INFO L175 Difference]: Start difference. First operand has 142 places, 186 transitions, 1814 flow. Second operand 7 states and 180 transitions. [2024-06-21 15:58:48,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 206 transitions, 2256 flow [2024-06-21 15:58:48,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 206 transitions, 2183 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 15:58:48,993 INFO L231 Difference]: Finished difference. Result has 144 places, 186 transitions, 1785 flow [2024-06-21 15:58:48,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1741, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1785, PETRI_PLACES=144, PETRI_TRANSITIONS=186} [2024-06-21 15:58:48,994 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-21 15:58:48,994 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 186 transitions, 1785 flow [2024-06-21 15:58:48,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:48,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:48,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:48,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 15:58:48,994 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:48,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:48,995 INFO L85 PathProgramCache]: Analyzing trace with hash -533074040, now seen corresponding path program 2 times [2024-06-21 15:58:48,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:48,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446933477] [2024-06-21 15:58:48,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:48,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:48,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:49,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:49,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:49,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446933477] [2024-06-21 15:58:49,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446933477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:49,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:49,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:49,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679043480] [2024-06-21 15:58:49,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:49,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:49,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:49,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:49,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:49,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:49,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 186 transitions, 1785 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:49,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:49,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:49,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:49,340 INFO L124 PetriNetUnfolderBase]: 1322/2308 cut-off events. [2024-06-21 15:58:49,340 INFO L125 PetriNetUnfolderBase]: For 75677/75677 co-relation queries the response was YES. [2024-06-21 15:58:49,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14215 conditions, 2308 events. 1322/2308 cut-off events. For 75677/75677 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13303 event pairs, 277 based on Foata normal form. 2/2305 useless extension candidates. Maximal degree in co-relation 14150. Up to 1836 conditions per place. [2024-06-21 15:58:49,358 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 146 selfloop transitions, 52 changer transitions 0/208 dead transitions. [2024-06-21 15:58:49,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 208 transitions, 2454 flow [2024-06-21 15:58:49,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:49,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:49,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-21 15:58:49,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624031007751938 [2024-06-21 15:58:49,360 INFO L175 Difference]: Start difference. First operand has 144 places, 186 transitions, 1785 flow. Second operand 6 states and 161 transitions. [2024-06-21 15:58:49,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 208 transitions, 2454 flow [2024-06-21 15:58:49,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 208 transitions, 2418 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 15:58:49,492 INFO L231 Difference]: Finished difference. Result has 144 places, 193 transitions, 1963 flow [2024-06-21 15:58:49,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1749, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1963, PETRI_PLACES=144, PETRI_TRANSITIONS=193} [2024-06-21 15:58:49,493 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-21 15:58:49,493 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 193 transitions, 1963 flow [2024-06-21 15:58:49,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:49,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:49,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:49,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 15:58:49,494 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:49,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:49,494 INFO L85 PathProgramCache]: Analyzing trace with hash -533067096, now seen corresponding path program 1 times [2024-06-21 15:58:49,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:49,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131265709] [2024-06-21 15:58:49,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:49,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:49,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:49,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:49,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131265709] [2024-06-21 15:58:49,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131265709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:49,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:49,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:49,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789710561] [2024-06-21 15:58:49,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:49,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:49,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:49,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:49,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:49,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:49,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 193 transitions, 1963 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:49,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:49,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:49,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:49,844 INFO L124 PetriNetUnfolderBase]: 1332/2324 cut-off events. [2024-06-21 15:58:49,845 INFO L125 PetriNetUnfolderBase]: For 79767/79767 co-relation queries the response was YES. [2024-06-21 15:58:49,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14550 conditions, 2324 events. 1332/2324 cut-off events. For 79767/79767 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13396 event pairs, 281 based on Foata normal form. 2/2319 useless extension candidates. Maximal degree in co-relation 14484. Up to 1885 conditions per place. [2024-06-21 15:58:49,864 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 178 selfloop transitions, 34 changer transitions 0/222 dead transitions. [2024-06-21 15:58:49,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 222 transitions, 2635 flow [2024-06-21 15:58:49,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:49,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:49,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-21 15:58:49,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6201550387596899 [2024-06-21 15:58:49,865 INFO L175 Difference]: Start difference. First operand has 144 places, 193 transitions, 1963 flow. Second operand 6 states and 160 transitions. [2024-06-21 15:58:49,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 222 transitions, 2635 flow [2024-06-21 15:58:49,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 222 transitions, 2563 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-21 15:58:49,995 INFO L231 Difference]: Finished difference. Result has 149 places, 207 transitions, 2125 flow [2024-06-21 15:58:49,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1891, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2125, PETRI_PLACES=149, PETRI_TRANSITIONS=207} [2024-06-21 15:58:49,996 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 105 predicate places. [2024-06-21 15:58:49,996 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 207 transitions, 2125 flow [2024-06-21 15:58:49,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:49,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:49,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:49,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 15:58:49,997 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:49,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:49,997 INFO L85 PathProgramCache]: Analyzing trace with hash 266434988, now seen corresponding path program 3 times [2024-06-21 15:58:49,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:49,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017221098] [2024-06-21 15:58:49,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:49,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:50,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:50,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:50,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:50,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017221098] [2024-06-21 15:58:50,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017221098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:50,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:50,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:50,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342097094] [2024-06-21 15:58:50,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:50,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:50,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:50,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:50,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:50,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:50,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 207 transitions, 2125 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:50,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:50,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:50,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:50,386 INFO L124 PetriNetUnfolderBase]: 1326/2301 cut-off events. [2024-06-21 15:58:50,386 INFO L125 PetriNetUnfolderBase]: For 83309/83309 co-relation queries the response was YES. [2024-06-21 15:58:50,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14731 conditions, 2301 events. 1326/2301 cut-off events. For 83309/83309 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13254 event pairs, 307 based on Foata normal form. 2/2295 useless extension candidates. Maximal degree in co-relation 14663. Up to 1845 conditions per place. [2024-06-21 15:58:50,402 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 154 selfloop transitions, 55 changer transitions 0/219 dead transitions. [2024-06-21 15:58:50,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 219 transitions, 2715 flow [2024-06-21 15:58:50,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:50,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:50,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 15:58:50,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6162790697674418 [2024-06-21 15:58:50,404 INFO L175 Difference]: Start difference. First operand has 149 places, 207 transitions, 2125 flow. Second operand 6 states and 159 transitions. [2024-06-21 15:58:50,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 219 transitions, 2715 flow [2024-06-21 15:58:50,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 219 transitions, 2656 flow, removed 26 selfloop flow, removed 1 redundant places. [2024-06-21 15:58:50,526 INFO L231 Difference]: Finished difference. Result has 154 places, 207 transitions, 2183 flow [2024-06-21 15:58:50,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2066, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2183, PETRI_PLACES=154, PETRI_TRANSITIONS=207} [2024-06-21 15:58:50,527 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-21 15:58:50,527 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 207 transitions, 2183 flow [2024-06-21 15:58:50,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:50,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:50,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:50,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 15:58:50,527 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:50,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:50,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1448333898, now seen corresponding path program 2 times [2024-06-21 15:58:50,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:50,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131376112] [2024-06-21 15:58:50,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:50,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:50,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:50,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:50,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:50,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131376112] [2024-06-21 15:58:50,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131376112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:50,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:50,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:50,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819454727] [2024-06-21 15:58:50,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:50,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:50,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:50,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:50,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:50,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:50,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 207 transitions, 2183 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:50,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:50,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:50,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:50,867 INFO L124 PetriNetUnfolderBase]: 1344/2340 cut-off events. [2024-06-21 15:58:50,867 INFO L125 PetriNetUnfolderBase]: For 88327/88327 co-relation queries the response was YES. [2024-06-21 15:58:50,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15150 conditions, 2340 events. 1344/2340 cut-off events. For 88327/88327 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13518 event pairs, 292 based on Foata normal form. 2/2337 useless extension candidates. Maximal degree in co-relation 15079. Up to 1896 conditions per place. [2024-06-21 15:58:50,887 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 174 selfloop transitions, 44 changer transitions 0/228 dead transitions. [2024-06-21 15:58:50,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 228 transitions, 2914 flow [2024-06-21 15:58:50,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:50,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:50,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-21 15:58:50,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6201550387596899 [2024-06-21 15:58:50,889 INFO L175 Difference]: Start difference. First operand has 154 places, 207 transitions, 2183 flow. Second operand 6 states and 160 transitions. [2024-06-21 15:58:50,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 228 transitions, 2914 flow [2024-06-21 15:58:51,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 228 transitions, 2676 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 15:58:51,033 INFO L231 Difference]: Finished difference. Result has 153 places, 216 transitions, 2161 flow [2024-06-21 15:58:51,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1945, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2161, PETRI_PLACES=153, PETRI_TRANSITIONS=216} [2024-06-21 15:58:51,033 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 109 predicate places. [2024-06-21 15:58:51,033 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 216 transitions, 2161 flow [2024-06-21 15:58:51,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:51,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:51,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:51,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 15:58:51,034 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:51,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:51,034 INFO L85 PathProgramCache]: Analyzing trace with hash 2092067754, now seen corresponding path program 3 times [2024-06-21 15:58:51,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:51,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917052271] [2024-06-21 15:58:51,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:51,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:51,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:51,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:51,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917052271] [2024-06-21 15:58:51,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917052271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:51,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:51,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:51,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753474887] [2024-06-21 15:58:51,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:51,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:51,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:51,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:51,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:51,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:51,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 216 transitions, 2161 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:51,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:51,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:51,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:51,413 INFO L124 PetriNetUnfolderBase]: 1338/2332 cut-off events. [2024-06-21 15:58:51,413 INFO L125 PetriNetUnfolderBase]: For 89415/89415 co-relation queries the response was YES. [2024-06-21 15:58:51,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15057 conditions, 2332 events. 1338/2332 cut-off events. For 89415/89415 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 13478 event pairs, 292 based on Foata normal form. 2/2329 useless extension candidates. Maximal degree in co-relation 14986. Up to 1891 conditions per place. [2024-06-21 15:58:51,435 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 172 selfloop transitions, 45 changer transitions 0/227 dead transitions. [2024-06-21 15:58:51,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 227 transitions, 2697 flow [2024-06-21 15:58:51,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:51,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:51,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-21 15:58:51,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2024-06-21 15:58:51,437 INFO L175 Difference]: Start difference. First operand has 153 places, 216 transitions, 2161 flow. Second operand 6 states and 158 transitions. [2024-06-21 15:58:51,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 227 transitions, 2697 flow [2024-06-21 15:58:51,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 227 transitions, 2627 flow, removed 35 selfloop flow, removed 0 redundant places. [2024-06-21 15:58:51,560 INFO L231 Difference]: Finished difference. Result has 159 places, 216 transitions, 2188 flow [2024-06-21 15:58:51,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2091, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2188, PETRI_PLACES=159, PETRI_TRANSITIONS=216} [2024-06-21 15:58:51,560 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 115 predicate places. [2024-06-21 15:58:51,561 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 216 transitions, 2188 flow [2024-06-21 15:58:51,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:51,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:51,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:51,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 15:58:51,561 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:51,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:51,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1439752106, now seen corresponding path program 1 times [2024-06-21 15:58:51,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:51,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974454455] [2024-06-21 15:58:51,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:51,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:51,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:51,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:51,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:51,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974454455] [2024-06-21 15:58:51,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974454455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:51,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:51,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:51,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249528185] [2024-06-21 15:58:51,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:51,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:51,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:51,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:51,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:51,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-06-21 15:58:51,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 216 transitions, 2188 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 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) [2024-06-21 15:58:51,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:51,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-06-21 15:58:51,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:51,939 INFO L124 PetriNetUnfolderBase]: 1300/2302 cut-off events. [2024-06-21 15:58:51,939 INFO L125 PetriNetUnfolderBase]: For 99431/99431 co-relation queries the response was YES. [2024-06-21 15:58:51,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14860 conditions, 2302 events. 1300/2302 cut-off events. For 99431/99431 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 13634 event pairs, 281 based on Foata normal form. 12/2301 useless extension candidates. Maximal degree in co-relation 14786. Up to 1744 conditions per place. [2024-06-21 15:58:51,959 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 164 selfloop transitions, 32 changer transitions 0/232 dead transitions. [2024-06-21 15:58:51,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 232 transitions, 2660 flow [2024-06-21 15:58:51,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:51,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:51,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-21 15:58:51,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624031007751938 [2024-06-21 15:58:51,961 INFO L175 Difference]: Start difference. First operand has 159 places, 216 transitions, 2188 flow. Second operand 6 states and 161 transitions. [2024-06-21 15:58:51,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 232 transitions, 2660 flow [2024-06-21 15:58:52,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 232 transitions, 2564 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 15:58:52,104 INFO L231 Difference]: Finished difference. Result has 161 places, 218 transitions, 2199 flow [2024-06-21 15:58:52,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2092, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2199, PETRI_PLACES=161, PETRI_TRANSITIONS=218} [2024-06-21 15:58:52,105 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 117 predicate places. [2024-06-21 15:58:52,105 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 218 transitions, 2199 flow [2024-06-21 15:58:52,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 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) [2024-06-21 15:58:52,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:52,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:52,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 15:58:52,105 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:52,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:52,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1197788830, now seen corresponding path program 1 times [2024-06-21 15:58:52,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:52,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452632000] [2024-06-21 15:58:52,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:52,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:52,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:52,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:52,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452632000] [2024-06-21 15:58:52,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452632000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:52,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:52,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:52,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545771153] [2024-06-21 15:58:52,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:52,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:52,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:52,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:52,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:52,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:52,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 218 transitions, 2199 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:52,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:52,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:52,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:52,632 INFO L124 PetriNetUnfolderBase]: 1562/2691 cut-off events. [2024-06-21 15:58:52,633 INFO L125 PetriNetUnfolderBase]: For 131693/131693 co-relation queries the response was YES. [2024-06-21 15:58:52,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18486 conditions, 2691 events. 1562/2691 cut-off events. For 131693/131693 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 15911 event pairs, 228 based on Foata normal form. 18/2703 useless extension candidates. Maximal degree in co-relation 18411. Up to 1927 conditions per place. [2024-06-21 15:58:52,657 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 223 selfloop transitions, 36 changer transitions 0/269 dead transitions. [2024-06-21 15:58:52,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 269 transitions, 3133 flow [2024-06-21 15:58:52,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:58:52,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:58:52,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 253 transitions. [2024-06-21 15:58:52,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6537467700258398 [2024-06-21 15:58:52,658 INFO L175 Difference]: Start difference. First operand has 161 places, 218 transitions, 2199 flow. Second operand 9 states and 253 transitions. [2024-06-21 15:58:52,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 269 transitions, 3133 flow [2024-06-21 15:58:52,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 269 transitions, 3050 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 15:58:52,821 INFO L231 Difference]: Finished difference. Result has 166 places, 222 transitions, 2339 flow [2024-06-21 15:58:52,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2116, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2339, PETRI_PLACES=166, PETRI_TRANSITIONS=222} [2024-06-21 15:58:52,821 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-21 15:58:52,822 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 222 transitions, 2339 flow [2024-06-21 15:58:52,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:52,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:52,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:52,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 15:58:52,822 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:52,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:52,823 INFO L85 PathProgramCache]: Analyzing trace with hash 348201732, now seen corresponding path program 2 times [2024-06-21 15:58:52,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:52,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830141484] [2024-06-21 15:58:52,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:52,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:52,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:52,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:52,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:52,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830141484] [2024-06-21 15:58:52,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830141484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:52,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:52,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:52,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592019760] [2024-06-21 15:58:52,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:52,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:52,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:52,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:52,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:52,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:52,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 222 transitions, 2339 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:52,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:52,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:52,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:53,427 INFO L124 PetriNetUnfolderBase]: 1623/2810 cut-off events. [2024-06-21 15:58:53,427 INFO L125 PetriNetUnfolderBase]: For 140078/140078 co-relation queries the response was YES. [2024-06-21 15:58:53,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19457 conditions, 2810 events. 1623/2810 cut-off events. For 140078/140078 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 16781 event pairs, 317 based on Foata normal form. 18/2822 useless extension candidates. Maximal degree in co-relation 19381. Up to 2111 conditions per place. [2024-06-21 15:58:53,451 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 225 selfloop transitions, 31 changer transitions 0/266 dead transitions. [2024-06-21 15:58:53,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 266 transitions, 3193 flow [2024-06-21 15:58:53,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:53,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:53,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-21 15:58:53,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6598837209302325 [2024-06-21 15:58:53,452 INFO L175 Difference]: Start difference. First operand has 166 places, 222 transitions, 2339 flow. Second operand 8 states and 227 transitions. [2024-06-21 15:58:53,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 266 transitions, 3193 flow [2024-06-21 15:58:53,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 266 transitions, 3095 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 15:58:53,630 INFO L231 Difference]: Finished difference. Result has 169 places, 224 transitions, 2384 flow [2024-06-21 15:58:53,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2247, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2384, PETRI_PLACES=169, PETRI_TRANSITIONS=224} [2024-06-21 15:58:53,630 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 125 predicate places. [2024-06-21 15:58:53,631 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 224 transitions, 2384 flow [2024-06-21 15:58:53,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:53,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:53,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:53,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 15:58:53,631 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:53,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:53,632 INFO L85 PathProgramCache]: Analyzing trace with hash 420058270, now seen corresponding path program 3 times [2024-06-21 15:58:53,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:53,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12705903] [2024-06-21 15:58:53,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:53,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:53,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:53,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:53,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:53,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12705903] [2024-06-21 15:58:53,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12705903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:53,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:53,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:53,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066331581] [2024-06-21 15:58:53,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:53,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:53,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:53,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:53,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:53,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:53,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 224 transitions, 2384 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:53,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:53,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:53,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:54,180 INFO L124 PetriNetUnfolderBase]: 1577/2740 cut-off events. [2024-06-21 15:58:54,180 INFO L125 PetriNetUnfolderBase]: For 131661/131661 co-relation queries the response was YES. [2024-06-21 15:58:54,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17971 conditions, 2740 events. 1577/2740 cut-off events. For 131661/131661 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 16304 event pairs, 314 based on Foata normal form. 24/2758 useless extension candidates. Maximal degree in co-relation 17893. Up to 2212 conditions per place. [2024-06-21 15:58:54,203 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 224 selfloop transitions, 27 changer transitions 0/261 dead transitions. [2024-06-21 15:58:54,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 261 transitions, 2998 flow [2024-06-21 15:58:54,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:54,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:54,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-21 15:58:54,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6453488372093024 [2024-06-21 15:58:54,213 INFO L175 Difference]: Start difference. First operand has 169 places, 224 transitions, 2384 flow. Second operand 8 states and 222 transitions. [2024-06-21 15:58:54,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 261 transitions, 2998 flow [2024-06-21 15:58:54,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 261 transitions, 2856 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 15:58:54,430 INFO L231 Difference]: Finished difference. Result has 171 places, 224 transitions, 2304 flow [2024-06-21 15:58:54,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2242, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2304, PETRI_PLACES=171, PETRI_TRANSITIONS=224} [2024-06-21 15:58:54,430 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 127 predicate places. [2024-06-21 15:58:54,431 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 224 transitions, 2304 flow [2024-06-21 15:58:54,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:54,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:54,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:54,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 15:58:54,431 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:54,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:54,433 INFO L85 PathProgramCache]: Analyzing trace with hash -184217604, now seen corresponding path program 4 times [2024-06-21 15:58:54,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:54,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017380808] [2024-06-21 15:58:54,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:54,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:54,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:54,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:54,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:54,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017380808] [2024-06-21 15:58:54,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017380808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:54,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:54,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:54,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939187784] [2024-06-21 15:58:54,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:54,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:54,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:54,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:54,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:54,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:54,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 224 transitions, 2304 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:54,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:54,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:54,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:54,959 INFO L124 PetriNetUnfolderBase]: 1663/2887 cut-off events. [2024-06-21 15:58:54,960 INFO L125 PetriNetUnfolderBase]: For 136211/136211 co-relation queries the response was YES. [2024-06-21 15:58:54,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18553 conditions, 2887 events. 1663/2887 cut-off events. For 136211/136211 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 17471 event pairs, 348 based on Foata normal form. 24/2899 useless extension candidates. Maximal degree in co-relation 18474. Up to 2099 conditions per place. [2024-06-21 15:58:54,983 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 157 selfloop transitions, 95 changer transitions 0/262 dead transitions. [2024-06-21 15:58:54,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 262 transitions, 3162 flow [2024-06-21 15:58:54,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:54,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:54,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-21 15:58:54,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6656976744186046 [2024-06-21 15:58:54,984 INFO L175 Difference]: Start difference. First operand has 171 places, 224 transitions, 2304 flow. Second operand 8 states and 229 transitions. [2024-06-21 15:58:54,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 262 transitions, 3162 flow [2024-06-21 15:58:55,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 262 transitions, 3100 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 15:58:55,163 INFO L231 Difference]: Finished difference. Result has 172 places, 226 transitions, 2518 flow [2024-06-21 15:58:55,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2242, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2518, PETRI_PLACES=172, PETRI_TRANSITIONS=226} [2024-06-21 15:58:55,163 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-21 15:58:55,163 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 226 transitions, 2518 flow [2024-06-21 15:58:55,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:55,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:55,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:55,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 15:58:55,166 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:55,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:55,166 INFO L85 PathProgramCache]: Analyzing trace with hash -188979204, now seen corresponding path program 5 times [2024-06-21 15:58:55,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:55,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923579933] [2024-06-21 15:58:55,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:55,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:55,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:55,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:55,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923579933] [2024-06-21 15:58:55,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923579933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:55,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:55,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:55,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847315110] [2024-06-21 15:58:55,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:55,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:55,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:55,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:55,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:55,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:55,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 226 transitions, 2518 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:55,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:55,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:55,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:55,872 INFO L124 PetriNetUnfolderBase]: 1856/3216 cut-off events. [2024-06-21 15:58:55,872 INFO L125 PetriNetUnfolderBase]: For 166343/166343 co-relation queries the response was YES. [2024-06-21 15:58:55,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22190 conditions, 3216 events. 1856/3216 cut-off events. For 166343/166343 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 19885 event pairs, 386 based on Foata normal form. 18/3222 useless extension candidates. Maximal degree in co-relation 22110. Up to 2119 conditions per place. [2024-06-21 15:58:55,898 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 160 selfloop transitions, 101 changer transitions 0/271 dead transitions. [2024-06-21 15:58:55,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 271 transitions, 3648 flow [2024-06-21 15:58:55,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:55,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:55,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-21 15:58:55,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6773255813953488 [2024-06-21 15:58:55,900 INFO L175 Difference]: Start difference. First operand has 172 places, 226 transitions, 2518 flow. Second operand 8 states and 233 transitions. [2024-06-21 15:58:55,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 271 transitions, 3648 flow [2024-06-21 15:58:56,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 271 transitions, 3416 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 15:58:56,133 INFO L231 Difference]: Finished difference. Result has 174 places, 230 transitions, 2655 flow [2024-06-21 15:58:56,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2286, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2655, PETRI_PLACES=174, PETRI_TRANSITIONS=230} [2024-06-21 15:58:56,134 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 130 predicate places. [2024-06-21 15:58:56,134 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 230 transitions, 2655 flow [2024-06-21 15:58:56,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:56,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:56,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:56,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 15:58:56,135 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:56,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:56,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1927071740, now seen corresponding path program 6 times [2024-06-21 15:58:56,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:56,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140040152] [2024-06-21 15:58:56,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:56,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:56,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:56,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:56,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:56,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140040152] [2024-06-21 15:58:56,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140040152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:56,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:56,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:56,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923358639] [2024-06-21 15:58:56,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:56,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:56,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:56,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:56,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:56,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:56,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 230 transitions, 2655 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:56,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:56,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:56,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:56,669 INFO L124 PetriNetUnfolderBase]: 1810/3146 cut-off events. [2024-06-21 15:58:56,669 INFO L125 PetriNetUnfolderBase]: For 154868/154868 co-relation queries the response was YES. [2024-06-21 15:58:56,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20667 conditions, 3146 events. 1810/3146 cut-off events. For 154868/154868 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 19462 event pairs, 383 based on Foata normal form. 24/3158 useless extension candidates. Maximal degree in co-relation 20586. Up to 2344 conditions per place. [2024-06-21 15:58:56,696 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 160 selfloop transitions, 96 changer transitions 0/266 dead transitions. [2024-06-21 15:58:56,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 266 transitions, 3455 flow [2024-06-21 15:58:56,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:56,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:56,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-21 15:58:56,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6627906976744186 [2024-06-21 15:58:56,698 INFO L175 Difference]: Start difference. First operand has 174 places, 230 transitions, 2655 flow. Second operand 8 states and 228 transitions. [2024-06-21 15:58:56,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 266 transitions, 3455 flow [2024-06-21 15:58:56,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 266 transitions, 3232 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-21 15:58:56,982 INFO L231 Difference]: Finished difference. Result has 178 places, 230 transitions, 2632 flow [2024-06-21 15:58:56,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2432, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2632, PETRI_PLACES=178, PETRI_TRANSITIONS=230} [2024-06-21 15:58:56,983 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 134 predicate places. [2024-06-21 15:58:56,983 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 230 transitions, 2632 flow [2024-06-21 15:58:56,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:56,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:56,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:56,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 15:58:56,984 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:56,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:56,984 INFO L85 PathProgramCache]: Analyzing trace with hash -353220120, now seen corresponding path program 1 times [2024-06-21 15:58:56,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:56,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880264219] [2024-06-21 15:58:56,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:56,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:56,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:57,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:57,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:57,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880264219] [2024-06-21 15:58:57,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880264219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:57,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:57,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:57,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987307392] [2024-06-21 15:58:57,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:57,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:57,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:57,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:57,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:57,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:57,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 230 transitions, 2632 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:57,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:57,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:57,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:57,543 INFO L124 PetriNetUnfolderBase]: 1871/3245 cut-off events. [2024-06-21 15:58:57,543 INFO L125 PetriNetUnfolderBase]: For 152883/152883 co-relation queries the response was YES. [2024-06-21 15:58:57,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21186 conditions, 3245 events. 1871/3245 cut-off events. For 152883/152883 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 20191 event pairs, 374 based on Foata normal form. 18/3247 useless extension candidates. Maximal degree in co-relation 21103. Up to 2082 conditions per place. [2024-06-21 15:58:57,574 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 157 selfloop transitions, 104 changer transitions 0/271 dead transitions. [2024-06-21 15:58:57,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 271 transitions, 3546 flow [2024-06-21 15:58:57,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:57,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:57,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-21 15:58:57,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6686046511627907 [2024-06-21 15:58:57,576 INFO L175 Difference]: Start difference. First operand has 178 places, 230 transitions, 2632 flow. Second operand 8 states and 230 transitions. [2024-06-21 15:58:57,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 271 transitions, 3546 flow [2024-06-21 15:58:57,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 271 transitions, 3338 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 15:58:57,951 INFO L231 Difference]: Finished difference. Result has 179 places, 232 transitions, 2725 flow [2024-06-21 15:58:57,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2424, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2725, PETRI_PLACES=179, PETRI_TRANSITIONS=232} [2024-06-21 15:58:57,952 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 135 predicate places. [2024-06-21 15:58:57,952 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 232 transitions, 2725 flow [2024-06-21 15:58:57,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:57,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:57,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:57,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 15:58:57,952 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:57,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:57,953 INFO L85 PathProgramCache]: Analyzing trace with hash -715320880, now seen corresponding path program 7 times [2024-06-21 15:58:57,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:57,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002826196] [2024-06-21 15:58:57,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:57,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:57,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:58,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:58,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002826196] [2024-06-21 15:58:58,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002826196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:58,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:58,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:58,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856700330] [2024-06-21 15:58:58,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:58,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:58,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:58,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:58,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:58,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:58,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 232 transitions, 2725 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:58,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:58,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:58,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:58,552 INFO L124 PetriNetUnfolderBase]: 1957/3407 cut-off events. [2024-06-21 15:58:58,552 INFO L125 PetriNetUnfolderBase]: For 169536/169536 co-relation queries the response was YES. [2024-06-21 15:58:58,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22528 conditions, 3407 events. 1957/3407 cut-off events. For 169536/169536 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 21586 event pairs, 412 based on Foata normal form. 24/3423 useless extension candidates. Maximal degree in co-relation 22444. Up to 2589 conditions per place. [2024-06-21 15:58:58,580 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 170 selfloop transitions, 87 changer transitions 0/267 dead transitions. [2024-06-21 15:58:58,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 267 transitions, 3613 flow [2024-06-21 15:58:58,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:58,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:58,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-21 15:58:58,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6511627906976745 [2024-06-21 15:58:58,581 INFO L175 Difference]: Start difference. First operand has 179 places, 232 transitions, 2725 flow. Second operand 8 states and 224 transitions. [2024-06-21 15:58:58,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 267 transitions, 3613 flow [2024-06-21 15:58:58,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 267 transitions, 3348 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 15:58:58,897 INFO L231 Difference]: Finished difference. Result has 181 places, 234 transitions, 2732 flow [2024-06-21 15:58:58,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2460, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2732, PETRI_PLACES=181, PETRI_TRANSITIONS=234} [2024-06-21 15:58:58,897 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 137 predicate places. [2024-06-21 15:58:58,898 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 234 transitions, 2732 flow [2024-06-21 15:58:58,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:58,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:58,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:58,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 15:58:58,898 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:58,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:58,899 INFO L85 PathProgramCache]: Analyzing trace with hash -801060868, now seen corresponding path program 8 times [2024-06-21 15:58:58,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:58,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494419662] [2024-06-21 15:58:58,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:58,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:58,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:58,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:58,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494419662] [2024-06-21 15:58:58,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494419662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:58,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:58,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:58,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874747809] [2024-06-21 15:58:58,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:58,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:58,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:58,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:58,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:59,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:58:59,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 234 transitions, 2732 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:59,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:59,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:58:59,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:59,518 INFO L124 PetriNetUnfolderBase]: 2043/3560 cut-off events. [2024-06-21 15:58:59,519 INFO L125 PetriNetUnfolderBase]: For 179636/179636 co-relation queries the response was YES. [2024-06-21 15:58:59,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23410 conditions, 3560 events. 2043/3560 cut-off events. For 179636/179636 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 22777 event pairs, 430 based on Foata normal form. 24/3576 useless extension candidates. Maximal degree in co-relation 23325. Up to 2731 conditions per place. [2024-06-21 15:58:59,550 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 171 selfloop transitions, 89 changer transitions 0/270 dead transitions. [2024-06-21 15:58:59,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 270 transitions, 3732 flow [2024-06-21 15:58:59,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:59,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:59,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-21 15:58:59,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6511627906976745 [2024-06-21 15:58:59,551 INFO L175 Difference]: Start difference. First operand has 181 places, 234 transitions, 2732 flow. Second operand 8 states and 224 transitions. [2024-06-21 15:58:59,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 270 transitions, 3732 flow [2024-06-21 15:58:59,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 270 transitions, 3504 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 15:58:59,881 INFO L231 Difference]: Finished difference. Result has 183 places, 236 transitions, 2784 flow [2024-06-21 15:58:59,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2504, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2784, PETRI_PLACES=183, PETRI_TRANSITIONS=236} [2024-06-21 15:58:59,882 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 139 predicate places. [2024-06-21 15:58:59,882 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 236 transitions, 2784 flow [2024-06-21 15:58:59,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:59,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:59,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:59,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 15:58:59,883 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:59,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:59,883 INFO L85 PathProgramCache]: Analyzing trace with hash -805822468, now seen corresponding path program 9 times [2024-06-21 15:58:59,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:59,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092780983] [2024-06-21 15:58:59,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:59,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:59,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:59,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:59,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:59,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092780983] [2024-06-21 15:58:59,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092780983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:59,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:59,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:59,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099376563] [2024-06-21 15:58:59,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:59,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:59,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:59,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:59,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:00,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:00,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 236 transitions, 2784 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:00,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:00,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:00,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:00,584 INFO L124 PetriNetUnfolderBase]: 2211/3840 cut-off events. [2024-06-21 15:59:00,584 INFO L125 PetriNetUnfolderBase]: For 207480/207480 co-relation queries the response was YES. [2024-06-21 15:59:00,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26344 conditions, 3840 events. 2211/3840 cut-off events. For 207480/207480 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 24796 event pairs, 461 based on Foata normal form. 18/3850 useless extension candidates. Maximal degree in co-relation 26258. Up to 2582 conditions per place. [2024-06-21 15:59:00,626 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 172 selfloop transitions, 97 changer transitions 0/279 dead transitions. [2024-06-21 15:59:00,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 279 transitions, 4094 flow [2024-06-21 15:59:00,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:00,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:00,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-21 15:59:00,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6627906976744186 [2024-06-21 15:59:00,627 INFO L175 Difference]: Start difference. First operand has 183 places, 236 transitions, 2784 flow. Second operand 8 states and 228 transitions. [2024-06-21 15:59:00,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 279 transitions, 4094 flow [2024-06-21 15:59:00,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 279 transitions, 3858 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 15:59:00,934 INFO L231 Difference]: Finished difference. Result has 185 places, 240 transitions, 2941 flow [2024-06-21 15:59:00,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2548, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2941, PETRI_PLACES=185, PETRI_TRANSITIONS=240} [2024-06-21 15:59:00,934 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 141 predicate places. [2024-06-21 15:59:00,935 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 240 transitions, 2941 flow [2024-06-21 15:59:00,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:00,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:00,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:00,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 15:59:00,935 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:00,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:00,936 INFO L85 PathProgramCache]: Analyzing trace with hash 649130786, now seen corresponding path program 10 times [2024-06-21 15:59:00,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:00,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498470641] [2024-06-21 15:59:00,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:00,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:00,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:01,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:01,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:01,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498470641] [2024-06-21 15:59:01,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498470641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:01,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:01,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:01,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607304274] [2024-06-21 15:59:01,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:01,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:01,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:01,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:01,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:01,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:01,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 240 transitions, 2941 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:01,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:01,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:01,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:01,635 INFO L124 PetriNetUnfolderBase]: 2211/3849 cut-off events. [2024-06-21 15:59:01,635 INFO L125 PetriNetUnfolderBase]: For 204364/204364 co-relation queries the response was YES. [2024-06-21 15:59:01,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25668 conditions, 3849 events. 2211/3849 cut-off events. For 204364/204364 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 24820 event pairs, 463 based on Foata normal form. 24/3872 useless extension candidates. Maximal degree in co-relation 25581. Up to 3279 conditions per place. [2024-06-21 15:59:01,667 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 238 selfloop transitions, 26 changer transitions 0/274 dead transitions. [2024-06-21 15:59:01,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 274 transitions, 3715 flow [2024-06-21 15:59:01,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:59:01,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:59:01,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-21 15:59:01,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6072351421188631 [2024-06-21 15:59:01,669 INFO L175 Difference]: Start difference. First operand has 185 places, 240 transitions, 2941 flow. Second operand 9 states and 235 transitions. [2024-06-21 15:59:01,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 274 transitions, 3715 flow [2024-06-21 15:59:02,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 274 transitions, 3502 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-21 15:59:02,073 INFO L231 Difference]: Finished difference. Result has 190 places, 241 transitions, 2836 flow [2024-06-21 15:59:02,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2738, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2836, PETRI_PLACES=190, PETRI_TRANSITIONS=241} [2024-06-21 15:59:02,074 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 146 predicate places. [2024-06-21 15:59:02,074 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 241 transitions, 2836 flow [2024-06-21 15:59:02,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:02,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:02,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:02,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 15:59:02,074 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:02,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:02,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1318806300, now seen corresponding path program 2 times [2024-06-21 15:59:02,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:02,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389872549] [2024-06-21 15:59:02,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:02,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:02,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:02,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:02,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389872549] [2024-06-21 15:59:02,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389872549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:02,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:02,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:02,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733290644] [2024-06-21 15:59:02,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:02,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:02,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:02,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:02,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:02,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:02,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 241 transitions, 2836 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:02,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:02,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:02,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:02,684 INFO L124 PetriNetUnfolderBase]: 2272/3956 cut-off events. [2024-06-21 15:59:02,684 INFO L125 PetriNetUnfolderBase]: For 200250/200250 co-relation queries the response was YES. [2024-06-21 15:59:02,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26034 conditions, 3956 events. 2272/3956 cut-off events. For 200250/200250 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 25712 event pairs, 471 based on Foata normal form. 18/3966 useless extension candidates. Maximal degree in co-relation 25945. Up to 2869 conditions per place. [2024-06-21 15:59:02,723 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 176 selfloop transitions, 93 changer transitions 0/279 dead transitions. [2024-06-21 15:59:02,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 279 transitions, 3794 flow [2024-06-21 15:59:02,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:02,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:02,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-06-21 15:59:02,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6569767441860465 [2024-06-21 15:59:02,724 INFO L175 Difference]: Start difference. First operand has 190 places, 241 transitions, 2836 flow. Second operand 8 states and 226 transitions. [2024-06-21 15:59:02,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 279 transitions, 3794 flow [2024-06-21 15:59:03,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 279 transitions, 3698 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 15:59:03,090 INFO L231 Difference]: Finished difference. Result has 191 places, 243 transitions, 3035 flow [2024-06-21 15:59:03,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2740, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3035, PETRI_PLACES=191, PETRI_TRANSITIONS=243} [2024-06-21 15:59:03,091 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 147 predicate places. [2024-06-21 15:59:03,091 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 243 transitions, 3035 flow [2024-06-21 15:59:03,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:03,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:03,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:03,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 15:59:03,091 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:03,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:03,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1081748252, now seen corresponding path program 3 times [2024-06-21 15:59:03,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:03,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533727494] [2024-06-21 15:59:03,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:03,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:03,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:03,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:03,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:03,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533727494] [2024-06-21 15:59:03,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533727494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:03,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:03,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:03,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956720229] [2024-06-21 15:59:03,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:03,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:03,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:03,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:03,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:03,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:03,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 243 transitions, 3035 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:03,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:03,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:03,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:03,771 INFO L124 PetriNetUnfolderBase]: 2333/4081 cut-off events. [2024-06-21 15:59:03,771 INFO L125 PetriNetUnfolderBase]: For 210558/210558 co-relation queries the response was YES. [2024-06-21 15:59:03,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27097 conditions, 4081 events. 2333/4081 cut-off events. For 210558/210558 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 26744 event pairs, 482 based on Foata normal form. 18/4098 useless extension candidates. Maximal degree in co-relation 27007. Up to 3368 conditions per place. [2024-06-21 15:59:03,808 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 241 selfloop transitions, 30 changer transitions 0/281 dead transitions. [2024-06-21 15:59:03,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 281 transitions, 3901 flow [2024-06-21 15:59:03,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:59:03,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:59:03,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-06-21 15:59:03,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6149870801033591 [2024-06-21 15:59:03,810 INFO L175 Difference]: Start difference. First operand has 191 places, 243 transitions, 3035 flow. Second operand 9 states and 238 transitions. [2024-06-21 15:59:03,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 281 transitions, 3901 flow [2024-06-21 15:59:04,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 281 transitions, 3642 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 15:59:04,198 INFO L231 Difference]: Finished difference. Result has 194 places, 245 transitions, 2949 flow [2024-06-21 15:59:04,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2776, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2949, PETRI_PLACES=194, PETRI_TRANSITIONS=245} [2024-06-21 15:59:04,199 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 150 predicate places. [2024-06-21 15:59:04,199 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 245 transitions, 2949 flow [2024-06-21 15:59:04,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:04,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:04,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:04,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 15:59:04,199 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:04,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:04,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1736178916, now seen corresponding path program 4 times [2024-06-21 15:59:04,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:04,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228997487] [2024-06-21 15:59:04,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:04,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:04,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:04,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:04,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228997487] [2024-06-21 15:59:04,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228997487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:04,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:04,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:59:04,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321386449] [2024-06-21 15:59:04,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:04,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:59:04,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:04,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:59:04,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:59:04,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:04,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 245 transitions, 2949 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:04,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:04,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:04,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:04,883 INFO L124 PetriNetUnfolderBase]: 2386/4181 cut-off events. [2024-06-21 15:59:04,883 INFO L125 PetriNetUnfolderBase]: For 213853/213853 co-relation queries the response was YES. [2024-06-21 15:59:04,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27552 conditions, 4181 events. 2386/4181 cut-off events. For 213853/213853 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 27474 event pairs, 481 based on Foata normal form. 18/4198 useless extension candidates. Maximal degree in co-relation 27461. Up to 3169 conditions per place. [2024-06-21 15:59:05,007 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 245 selfloop transitions, 32 changer transitions 0/287 dead transitions. [2024-06-21 15:59:05,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 287 transitions, 3863 flow [2024-06-21 15:59:05,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:59:05,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:59:05,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-06-21 15:59:05,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6253229974160207 [2024-06-21 15:59:05,008 INFO L175 Difference]: Start difference. First operand has 194 places, 245 transitions, 2949 flow. Second operand 9 states and 242 transitions. [2024-06-21 15:59:05,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 287 transitions, 3863 flow [2024-06-21 15:59:05,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 287 transitions, 3726 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-21 15:59:05,379 INFO L231 Difference]: Finished difference. Result has 195 places, 246 transitions, 2901 flow [2024-06-21 15:59:05,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2730, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2901, PETRI_PLACES=195, PETRI_TRANSITIONS=246} [2024-06-21 15:59:05,379 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 151 predicate places. [2024-06-21 15:59:05,379 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 246 transitions, 2901 flow [2024-06-21 15:59:05,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:05,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:05,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:05,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 15:59:05,380 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:05,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:05,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1396533257, now seen corresponding path program 1 times [2024-06-21 15:59:05,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:05,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834518212] [2024-06-21 15:59:05,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:05,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:05,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:05,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:05,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:05,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834518212] [2024-06-21 15:59:05,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834518212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:05,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:05,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:59:05,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138327492] [2024-06-21 15:59:05,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:05,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:59:05,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:05,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:59:05,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:59:05,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:05,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 246 transitions, 2901 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:05,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:05,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:05,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:05,963 INFO L124 PetriNetUnfolderBase]: 2399/4197 cut-off events. [2024-06-21 15:59:05,963 INFO L125 PetriNetUnfolderBase]: For 201035/201035 co-relation queries the response was YES. [2024-06-21 15:59:05,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27495 conditions, 4197 events. 2399/4197 cut-off events. For 201035/201035 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 27758 event pairs, 542 based on Foata normal form. 1/4190 useless extension candidates. Maximal degree in co-relation 27403. Up to 3649 conditions per place. [2024-06-21 15:59:06,002 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 216 selfloop transitions, 39 changer transitions 0/265 dead transitions. [2024-06-21 15:59:06,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 265 transitions, 3625 flow [2024-06-21 15:59:06,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:59:06,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:59:06,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-06-21 15:59:06,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.641860465116279 [2024-06-21 15:59:06,004 INFO L175 Difference]: Start difference. First operand has 195 places, 246 transitions, 2901 flow. Second operand 5 states and 138 transitions. [2024-06-21 15:59:06,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 265 transitions, 3625 flow [2024-06-21 15:59:06,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 265 transitions, 3504 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-21 15:59:06,405 INFO L231 Difference]: Finished difference. Result has 195 places, 252 transitions, 2951 flow [2024-06-21 15:59:06,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2780, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2951, PETRI_PLACES=195, PETRI_TRANSITIONS=252} [2024-06-21 15:59:06,405 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 151 predicate places. [2024-06-21 15:59:06,405 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 252 transitions, 2951 flow [2024-06-21 15:59:06,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:06,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:06,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:06,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 15:59:06,406 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:06,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:06,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1100874479, now seen corresponding path program 2 times [2024-06-21 15:59:06,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:06,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894306662] [2024-06-21 15:59:06,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:06,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:06,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:06,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:06,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894306662] [2024-06-21 15:59:06,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894306662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:06,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:06,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:59:06,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501674888] [2024-06-21 15:59:06,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:06,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:59:06,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:06,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:59:06,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:59:06,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:06,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 252 transitions, 2951 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:06,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:06,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:06,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:07,019 INFO L124 PetriNetUnfolderBase]: 2396/4194 cut-off events. [2024-06-21 15:59:07,019 INFO L125 PetriNetUnfolderBase]: For 194940/194940 co-relation queries the response was YES. [2024-06-21 15:59:07,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26954 conditions, 4194 events. 2396/4194 cut-off events. For 194940/194940 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 27775 event pairs, 539 based on Foata normal form. 1/4190 useless extension candidates. Maximal degree in co-relation 26860. Up to 3646 conditions per place. [2024-06-21 15:59:07,059 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 212 selfloop transitions, 44 changer transitions 0/266 dead transitions. [2024-06-21 15:59:07,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 266 transitions, 3497 flow [2024-06-21 15:59:07,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:07,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:07,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 15:59:07,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6079734219269103 [2024-06-21 15:59:07,060 INFO L175 Difference]: Start difference. First operand has 195 places, 252 transitions, 2951 flow. Second operand 7 states and 183 transitions. [2024-06-21 15:59:07,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 266 transitions, 3497 flow [2024-06-21 15:59:07,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 266 transitions, 3466 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-21 15:59:07,454 INFO L231 Difference]: Finished difference. Result has 200 places, 252 transitions, 3019 flow [2024-06-21 15:59:07,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2920, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3019, PETRI_PLACES=200, PETRI_TRANSITIONS=252} [2024-06-21 15:59:07,455 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-21 15:59:07,455 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 252 transitions, 3019 flow [2024-06-21 15:59:07,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:07,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:07,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:07,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 15:59:07,456 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:07,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:07,456 INFO L85 PathProgramCache]: Analyzing trace with hash 346871213, now seen corresponding path program 1 times [2024-06-21 15:59:07,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:07,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824922000] [2024-06-21 15:59:07,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:07,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:07,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:07,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:07,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:07,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824922000] [2024-06-21 15:59:07,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824922000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:07,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:07,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:59:07,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949802657] [2024-06-21 15:59:07,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:07,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:59:07,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:07,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:59:07,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:59:07,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:07,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 252 transitions, 3019 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:07,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:07,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:07,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:08,061 INFO L124 PetriNetUnfolderBase]: 2404/4205 cut-off events. [2024-06-21 15:59:08,062 INFO L125 PetriNetUnfolderBase]: For 197967/197967 co-relation queries the response was YES. [2024-06-21 15:59:08,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27246 conditions, 4205 events. 2404/4205 cut-off events. For 197967/197967 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 27732 event pairs, 453 based on Foata normal form. 2/4199 useless extension candidates. Maximal degree in co-relation 27151. Up to 3672 conditions per place. [2024-06-21 15:59:08,104 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 242 selfloop transitions, 19 changer transitions 0/271 dead transitions. [2024-06-21 15:59:08,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 271 transitions, 3815 flow [2024-06-21 15:59:08,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:59:08,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:59:08,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-21 15:59:08,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6232558139534884 [2024-06-21 15:59:08,105 INFO L175 Difference]: Start difference. First operand has 200 places, 252 transitions, 3019 flow. Second operand 5 states and 134 transitions. [2024-06-21 15:59:08,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 271 transitions, 3815 flow [2024-06-21 15:59:08,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 271 transitions, 3695 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 15:59:08,612 INFO L231 Difference]: Finished difference. Result has 198 places, 256 transitions, 3076 flow [2024-06-21 15:59:08,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2901, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3076, PETRI_PLACES=198, PETRI_TRANSITIONS=256} [2024-06-21 15:59:08,613 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 154 predicate places. [2024-06-21 15:59:08,613 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 256 transitions, 3076 flow [2024-06-21 15:59:08,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:08,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:08,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:08,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 15:59:08,614 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:08,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:08,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1844530449, now seen corresponding path program 2 times [2024-06-21 15:59:08,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:08,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113941335] [2024-06-21 15:59:08,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:08,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:08,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:08,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:08,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:08,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113941335] [2024-06-21 15:59:08,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113941335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:08,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:08,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:59:08,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168560735] [2024-06-21 15:59:08,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:08,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:59:08,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:08,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:59:08,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:59:08,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:08,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 256 transitions, 3076 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:08,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:08,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:08,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:09,299 INFO L124 PetriNetUnfolderBase]: 2399/4199 cut-off events. [2024-06-21 15:59:09,300 INFO L125 PetriNetUnfolderBase]: For 195406/195406 co-relation queries the response was YES. [2024-06-21 15:59:09,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27037 conditions, 4199 events. 2399/4199 cut-off events. For 195406/195406 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 27815 event pairs, 536 based on Foata normal form. 2/4196 useless extension candidates. Maximal degree in co-relation 26942. Up to 3712 conditions per place. [2024-06-21 15:59:09,345 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 238 selfloop transitions, 18 changer transitions 0/266 dead transitions. [2024-06-21 15:59:09,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 266 transitions, 3612 flow [2024-06-21 15:59:09,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:59:09,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:59:09,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-21 15:59:09,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6093023255813953 [2024-06-21 15:59:09,346 INFO L175 Difference]: Start difference. First operand has 198 places, 256 transitions, 3076 flow. Second operand 5 states and 131 transitions. [2024-06-21 15:59:09,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 266 transitions, 3612 flow [2024-06-21 15:59:09,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 266 transitions, 3488 flow, removed 56 selfloop flow, removed 1 redundant places. [2024-06-21 15:59:09,821 INFO L231 Difference]: Finished difference. Result has 202 places, 256 transitions, 2993 flow [2024-06-21 15:59:09,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2952, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2993, PETRI_PLACES=202, PETRI_TRANSITIONS=256} [2024-06-21 15:59:09,822 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 158 predicate places. [2024-06-21 15:59:09,822 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 256 transitions, 2993 flow [2024-06-21 15:59:09,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:09,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:09,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:09,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 15:59:09,823 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:09,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:09,823 INFO L85 PathProgramCache]: Analyzing trace with hash -460714603, now seen corresponding path program 3 times [2024-06-21 15:59:09,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:09,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360797269] [2024-06-21 15:59:09,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:09,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:09,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:09,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:09,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:09,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360797269] [2024-06-21 15:59:09,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360797269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:09,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:09,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:59:09,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048087227] [2024-06-21 15:59:09,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:09,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:59:09,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:09,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:59:09,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:59:09,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:09,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 256 transitions, 2993 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:09,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:09,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:09,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:10,405 INFO L124 PetriNetUnfolderBase]: 2404/4207 cut-off events. [2024-06-21 15:59:10,405 INFO L125 PetriNetUnfolderBase]: For 198792/198792 co-relation queries the response was YES. [2024-06-21 15:59:10,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27046 conditions, 4207 events. 2404/4207 cut-off events. For 198792/198792 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 27856 event pairs, 539 based on Foata normal form. 1/4200 useless extension candidates. Maximal degree in co-relation 26949. Up to 3623 conditions per place. [2024-06-21 15:59:10,446 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 218 selfloop transitions, 48 changer transitions 0/276 dead transitions. [2024-06-21 15:59:10,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 276 transitions, 3722 flow [2024-06-21 15:59:10,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:59:10,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:59:10,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-21 15:59:10,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624031007751938 [2024-06-21 15:59:10,447 INFO L175 Difference]: Start difference. First operand has 202 places, 256 transitions, 2993 flow. Second operand 6 states and 161 transitions. [2024-06-21 15:59:10,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 276 transitions, 3722 flow [2024-06-21 15:59:10,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 276 transitions, 3674 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 15:59:10,764 INFO L231 Difference]: Finished difference. Result has 204 places, 259 transitions, 3091 flow [2024-06-21 15:59:10,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2945, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3091, PETRI_PLACES=204, PETRI_TRANSITIONS=259} [2024-06-21 15:59:10,765 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 160 predicate places. [2024-06-21 15:59:10,765 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 259 transitions, 3091 flow [2024-06-21 15:59:10,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:10,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:10,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:10,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 15:59:10,766 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:10,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:10,766 INFO L85 PathProgramCache]: Analyzing trace with hash -882462887, now seen corresponding path program 4 times [2024-06-21 15:59:10,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:10,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829151663] [2024-06-21 15:59:10,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:10,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:10,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:10,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829151663] [2024-06-21 15:59:10,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829151663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:10,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:10,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:59:10,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304622072] [2024-06-21 15:59:10,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:10,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:59:10,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:10,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:59:10,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:59:10,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:10,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 259 transitions, 3091 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:10,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:10,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:10,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:11,355 INFO L124 PetriNetUnfolderBase]: 2409/4216 cut-off events. [2024-06-21 15:59:11,356 INFO L125 PetriNetUnfolderBase]: For 205226/205226 co-relation queries the response was YES. [2024-06-21 15:59:11,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27314 conditions, 4216 events. 2409/4216 cut-off events. For 205226/205226 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 27922 event pairs, 539 based on Foata normal form. 1/4209 useless extension candidates. Maximal degree in co-relation 27216. Up to 3629 conditions per place. [2024-06-21 15:59:11,397 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 213 selfloop transitions, 53 changer transitions 0/276 dead transitions. [2024-06-21 15:59:11,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 276 transitions, 3820 flow [2024-06-21 15:59:11,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:59:11,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:59:11,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 15:59:11,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6162790697674418 [2024-06-21 15:59:11,398 INFO L175 Difference]: Start difference. First operand has 204 places, 259 transitions, 3091 flow. Second operand 6 states and 159 transitions. [2024-06-21 15:59:11,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 276 transitions, 3820 flow [2024-06-21 15:59:11,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 276 transitions, 3674 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-21 15:59:11,809 INFO L231 Difference]: Finished difference. Result has 206 places, 262 transitions, 3106 flow [2024-06-21 15:59:11,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2958, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3106, PETRI_PLACES=206, PETRI_TRANSITIONS=262} [2024-06-21 15:59:11,810 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 162 predicate places. [2024-06-21 15:59:11,810 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 262 transitions, 3106 flow [2024-06-21 15:59:11,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:11,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:11,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:11,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 15:59:11,811 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:11,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:11,811 INFO L85 PathProgramCache]: Analyzing trace with hash 2037148265, now seen corresponding path program 5 times [2024-06-21 15:59:11,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:11,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252086769] [2024-06-21 15:59:11,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:11,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:11,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:11,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:11,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:11,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252086769] [2024-06-21 15:59:11,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252086769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:11,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:11,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:59:11,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727968748] [2024-06-21 15:59:11,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:11,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:59:11,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:11,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:59:11,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:59:11,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:11,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 262 transitions, 3106 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:11,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:11,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:11,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:12,407 INFO L124 PetriNetUnfolderBase]: 2406/4199 cut-off events. [2024-06-21 15:59:12,408 INFO L125 PetriNetUnfolderBase]: For 209953/209953 co-relation queries the response was YES. [2024-06-21 15:59:12,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27200 conditions, 4199 events. 2406/4199 cut-off events. For 209953/209953 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 27777 event pairs, 565 based on Foata normal form. 1/4192 useless extension candidates. Maximal degree in co-relation 27102. Up to 3626 conditions per place. [2024-06-21 15:59:12,449 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 207 selfloop transitions, 55 changer transitions 0/272 dead transitions. [2024-06-21 15:59:12,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 272 transitions, 3654 flow [2024-06-21 15:59:12,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:59:12,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:59:12,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-21 15:59:12,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-21 15:59:12,451 INFO L175 Difference]: Start difference. First operand has 206 places, 262 transitions, 3106 flow. Second operand 6 states and 156 transitions. [2024-06-21 15:59:12,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 272 transitions, 3654 flow [2024-06-21 15:59:12,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 272 transitions, 3570 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 15:59:12,918 INFO L231 Difference]: Finished difference. Result has 209 places, 262 transitions, 3138 flow [2024-06-21 15:59:12,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3022, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3138, PETRI_PLACES=209, PETRI_TRANSITIONS=262} [2024-06-21 15:59:12,919 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 165 predicate places. [2024-06-21 15:59:12,919 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 262 transitions, 3138 flow [2024-06-21 15:59:12,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:12,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:12,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:12,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 15:59:12,920 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:12,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:12,920 INFO L85 PathProgramCache]: Analyzing trace with hash 185249593, now seen corresponding path program 1 times [2024-06-21 15:59:12,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:12,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790317871] [2024-06-21 15:59:12,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:12,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:12,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:12,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:12,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:12,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790317871] [2024-06-21 15:59:12,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790317871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:12,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:12,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:12,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499561161] [2024-06-21 15:59:12,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:12,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:12,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:12,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:12,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:13,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:13,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 262 transitions, 3138 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:13,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:13,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:13,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:13,586 INFO L124 PetriNetUnfolderBase]: 2411/4223 cut-off events. [2024-06-21 15:59:13,586 INFO L125 PetriNetUnfolderBase]: For 217201/217201 co-relation queries the response was YES. [2024-06-21 15:59:13,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27392 conditions, 4223 events. 2411/4223 cut-off events. For 217201/217201 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 27973 event pairs, 531 based on Foata normal form. 1/4215 useless extension candidates. Maximal degree in co-relation 27293. Up to 3633 conditions per place. [2024-06-21 15:59:13,626 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 222 selfloop transitions, 58 changer transitions 0/290 dead transitions. [2024-06-21 15:59:13,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 290 transitions, 4039 flow [2024-06-21 15:59:13,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:13,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:13,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-21 15:59:13,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6345514950166113 [2024-06-21 15:59:13,627 INFO L175 Difference]: Start difference. First operand has 209 places, 262 transitions, 3138 flow. Second operand 7 states and 191 transitions. [2024-06-21 15:59:13,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 290 transitions, 4039 flow [2024-06-21 15:59:14,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 290 transitions, 3807 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 15:59:14,026 INFO L231 Difference]: Finished difference. Result has 208 places, 265 transitions, 3071 flow [2024-06-21 15:59:14,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2906, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3071, PETRI_PLACES=208, PETRI_TRANSITIONS=265} [2024-06-21 15:59:14,027 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 164 predicate places. [2024-06-21 15:59:14,027 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 265 transitions, 3071 flow [2024-06-21 15:59:14,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:14,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:14,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:14,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 15:59:14,028 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:14,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:14,028 INFO L85 PathProgramCache]: Analyzing trace with hash -2037224429, now seen corresponding path program 2 times [2024-06-21 15:59:14,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:14,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527236378] [2024-06-21 15:59:14,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:14,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:14,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:14,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:14,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527236378] [2024-06-21 15:59:14,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527236378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:14,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:14,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:14,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147475189] [2024-06-21 15:59:14,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:14,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:14,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:14,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:14,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:14,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:14,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 265 transitions, 3071 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:14,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:14,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:14,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:14,667 INFO L124 PetriNetUnfolderBase]: 2408/4224 cut-off events. [2024-06-21 15:59:14,667 INFO L125 PetriNetUnfolderBase]: For 220358/220358 co-relation queries the response was YES. [2024-06-21 15:59:14,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27373 conditions, 4224 events. 2408/4224 cut-off events. For 220358/220358 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 28039 event pairs, 520 based on Foata normal form. 1/4220 useless extension candidates. Maximal degree in co-relation 27274. Up to 3630 conditions per place. [2024-06-21 15:59:14,709 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 221 selfloop transitions, 55 changer transitions 0/286 dead transitions. [2024-06-21 15:59:14,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 286 transitions, 3795 flow [2024-06-21 15:59:14,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:14,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:14,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-21 15:59:14,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6179401993355482 [2024-06-21 15:59:14,710 INFO L175 Difference]: Start difference. First operand has 208 places, 265 transitions, 3071 flow. Second operand 7 states and 186 transitions. [2024-06-21 15:59:14,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 286 transitions, 3795 flow [2024-06-21 15:59:15,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 286 transitions, 3693 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 15:59:15,227 INFO L231 Difference]: Finished difference. Result has 211 places, 265 transitions, 3085 flow [2024-06-21 15:59:15,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2969, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3085, PETRI_PLACES=211, PETRI_TRANSITIONS=265} [2024-06-21 15:59:15,227 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 167 predicate places. [2024-06-21 15:59:15,227 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 265 transitions, 3085 flow [2024-06-21 15:59:15,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:15,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:15,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:15,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 15:59:15,228 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:15,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:15,228 INFO L85 PathProgramCache]: Analyzing trace with hash -945390807, now seen corresponding path program 3 times [2024-06-21 15:59:15,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:15,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163743605] [2024-06-21 15:59:15,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:15,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:15,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:15,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:15,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:15,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163743605] [2024-06-21 15:59:15,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163743605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:15,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:15,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:15,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648899229] [2024-06-21 15:59:15,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:15,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:15,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:15,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:15,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:15,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:15,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 265 transitions, 3085 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:15,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:15,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:15,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:15,879 INFO L124 PetriNetUnfolderBase]: 2413/4232 cut-off events. [2024-06-21 15:59:15,880 INFO L125 PetriNetUnfolderBase]: For 226265/226265 co-relation queries the response was YES. [2024-06-21 15:59:15,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27528 conditions, 4232 events. 2413/4232 cut-off events. For 226265/226265 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 28089 event pairs, 528 based on Foata normal form. 1/4228 useless extension candidates. Maximal degree in co-relation 27427. Up to 3636 conditions per place. [2024-06-21 15:59:15,916 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 215 selfloop transitions, 58 changer transitions 0/283 dead transitions. [2024-06-21 15:59:15,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 283 transitions, 3834 flow [2024-06-21 15:59:15,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:15,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:15,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 15:59:15,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5980066445182725 [2024-06-21 15:59:15,918 INFO L175 Difference]: Start difference. First operand has 211 places, 265 transitions, 3085 flow. Second operand 7 states and 180 transitions. [2024-06-21 15:59:15,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 283 transitions, 3834 flow [2024-06-21 15:59:16,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 283 transitions, 3649 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 15:59:16,443 INFO L231 Difference]: Finished difference. Result has 210 places, 268 transitions, 3067 flow [2024-06-21 15:59:16,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2906, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3067, PETRI_PLACES=210, PETRI_TRANSITIONS=268} [2024-06-21 15:59:16,444 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 166 predicate places. [2024-06-21 15:59:16,444 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 268 transitions, 3067 flow [2024-06-21 15:59:16,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:16,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:16,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:16,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 15:59:16,445 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:16,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:16,445 INFO L85 PathProgramCache]: Analyzing trace with hash -953954743, now seen corresponding path program 1 times [2024-06-21 15:59:16,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:16,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915362131] [2024-06-21 15:59:16,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:16,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:16,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:16,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:16,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:16,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915362131] [2024-06-21 15:59:16,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915362131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:16,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:16,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:59:16,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641135236] [2024-06-21 15:59:16,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:16,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:59:16,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:16,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:59:16,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:59:16,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:16,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 268 transitions, 3067 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:16,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:16,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:16,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:17,033 INFO L124 PetriNetUnfolderBase]: 2426/4252 cut-off events. [2024-06-21 15:59:17,033 INFO L125 PetriNetUnfolderBase]: For 234260/234260 co-relation queries the response was YES. [2024-06-21 15:59:17,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27770 conditions, 4252 events. 2426/4252 cut-off events. For 234260/234260 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 28215 event pairs, 532 based on Foata normal form. 1/4246 useless extension candidates. Maximal degree in co-relation 27670. Up to 3681 conditions per place. [2024-06-21 15:59:17,074 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 233 selfloop transitions, 49 changer transitions 0/292 dead transitions. [2024-06-21 15:59:17,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 292 transitions, 4003 flow [2024-06-21 15:59:17,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:59:17,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:59:17,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-21 15:59:17,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6317829457364341 [2024-06-21 15:59:17,076 INFO L175 Difference]: Start difference. First operand has 210 places, 268 transitions, 3067 flow. Second operand 6 states and 163 transitions. [2024-06-21 15:59:17,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 292 transitions, 4003 flow [2024-06-21 15:59:17,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 292 transitions, 3907 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 15:59:17,530 INFO L231 Difference]: Finished difference. Result has 212 places, 274 transitions, 3155 flow [2024-06-21 15:59:17,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2971, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3155, PETRI_PLACES=212, PETRI_TRANSITIONS=274} [2024-06-21 15:59:17,531 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 168 predicate places. [2024-06-21 15:59:17,531 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 274 transitions, 3155 flow [2024-06-21 15:59:17,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:17,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:17,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:17,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 15:59:17,532 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:17,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:17,532 INFO L85 PathProgramCache]: Analyzing trace with hash -938717623, now seen corresponding path program 2 times [2024-06-21 15:59:17,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:17,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460425199] [2024-06-21 15:59:17,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:17,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:17,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:17,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:17,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460425199] [2024-06-21 15:59:17,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460425199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:17,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:17,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:17,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867707901] [2024-06-21 15:59:17,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:17,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:17,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:17,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:17,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:17,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:17,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 274 transitions, 3155 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:17,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:17,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:17,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:18,199 INFO L124 PetriNetUnfolderBase]: 2431/4261 cut-off events. [2024-06-21 15:59:18,199 INFO L125 PetriNetUnfolderBase]: For 241282/241282 co-relation queries the response was YES. [2024-06-21 15:59:18,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27915 conditions, 4261 events. 2431/4261 cut-off events. For 241282/241282 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 28293 event pairs, 532 based on Foata normal form. 1/4255 useless extension candidates. Maximal degree in co-relation 27814. Up to 3687 conditions per place. [2024-06-21 15:59:18,236 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 232 selfloop transitions, 50 changer transitions 0/292 dead transitions. [2024-06-21 15:59:18,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 292 transitions, 3927 flow [2024-06-21 15:59:18,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:18,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:18,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 15:59:18,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5980066445182725 [2024-06-21 15:59:18,237 INFO L175 Difference]: Start difference. First operand has 212 places, 274 transitions, 3155 flow. Second operand 7 states and 180 transitions. [2024-06-21 15:59:18,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 292 transitions, 3927 flow [2024-06-21 15:59:18,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 292 transitions, 3849 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-21 15:59:18,911 INFO L231 Difference]: Finished difference. Result has 217 places, 277 transitions, 3229 flow [2024-06-21 15:59:18,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3082, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3229, PETRI_PLACES=217, PETRI_TRANSITIONS=277} [2024-06-21 15:59:18,912 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 173 predicate places. [2024-06-21 15:59:18,912 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 277 transitions, 3229 flow [2024-06-21 15:59:18,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:18,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:18,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:18,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 15:59:18,913 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:18,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:18,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1506356093, now seen corresponding path program 4 times [2024-06-21 15:59:18,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:18,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962581566] [2024-06-21 15:59:18,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:18,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:18,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:18,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:18,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:18,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962581566] [2024-06-21 15:59:18,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962581566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:18,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:18,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:18,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985778600] [2024-06-21 15:59:18,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:18,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:18,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:18,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:18,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:19,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:19,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 277 transitions, 3229 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:19,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:19,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:19,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:19,535 INFO L124 PetriNetUnfolderBase]: 2428/4242 cut-off events. [2024-06-21 15:59:19,535 INFO L125 PetriNetUnfolderBase]: For 246675/246675 co-relation queries the response was YES. [2024-06-21 15:59:19,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27935 conditions, 4242 events. 2428/4242 cut-off events. For 246675/246675 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 28152 event pairs, 560 based on Foata normal form. 1/4235 useless extension candidates. Maximal degree in co-relation 27833. Up to 3658 conditions per place. [2024-06-21 15:59:19,577 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 217 selfloop transitions, 61 changer transitions 0/288 dead transitions. [2024-06-21 15:59:19,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 288 transitions, 3811 flow [2024-06-21 15:59:19,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:19,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:19,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 15:59:19,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880398671096345 [2024-06-21 15:59:19,578 INFO L175 Difference]: Start difference. First operand has 217 places, 277 transitions, 3229 flow. Second operand 7 states and 177 transitions. [2024-06-21 15:59:19,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 288 transitions, 3811 flow [2024-06-21 15:59:20,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 288 transitions, 3685 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 15:59:20,177 INFO L231 Difference]: Finished difference. Result has 219 places, 277 transitions, 3231 flow [2024-06-21 15:59:20,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3103, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3231, PETRI_PLACES=219, PETRI_TRANSITIONS=277} [2024-06-21 15:59:20,178 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 175 predicate places. [2024-06-21 15:59:20,178 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 277 transitions, 3231 flow [2024-06-21 15:59:20,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:20,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:20,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:20,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 15:59:20,179 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:20,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:20,179 INFO L85 PathProgramCache]: Analyzing trace with hash 314471983, now seen corresponding path program 3 times [2024-06-21 15:59:20,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:20,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030630835] [2024-06-21 15:59:20,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:20,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:20,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:20,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:20,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030630835] [2024-06-21 15:59:20,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030630835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:20,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:20,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:59:20,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571791673] [2024-06-21 15:59:20,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:20,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:59:20,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:20,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:59:20,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:59:20,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:20,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 277 transitions, 3231 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:20,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:20,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:20,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:20,848 INFO L124 PetriNetUnfolderBase]: 2433/4264 cut-off events. [2024-06-21 15:59:20,848 INFO L125 PetriNetUnfolderBase]: For 253144/253144 co-relation queries the response was YES. [2024-06-21 15:59:20,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28110 conditions, 4264 events. 2433/4264 cut-off events. For 253144/253144 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 28288 event pairs, 536 based on Foata normal form. 1/4255 useless extension candidates. Maximal degree in co-relation 28007. Up to 3689 conditions per place. [2024-06-21 15:59:20,892 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 234 selfloop transitions, 57 changer transitions 0/301 dead transitions. [2024-06-21 15:59:20,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 301 transitions, 4168 flow [2024-06-21 15:59:20,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:59:20,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:59:20,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-21 15:59:20,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6472868217054264 [2024-06-21 15:59:20,893 INFO L175 Difference]: Start difference. First operand has 219 places, 277 transitions, 3231 flow. Second operand 6 states and 167 transitions. [2024-06-21 15:59:20,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 301 transitions, 4168 flow [2024-06-21 15:59:21,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 301 transitions, 3983 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 15:59:21,590 INFO L231 Difference]: Finished difference. Result has 218 places, 280 transitions, 3209 flow [2024-06-21 15:59:21,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3046, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3209, PETRI_PLACES=218, PETRI_TRANSITIONS=280} [2024-06-21 15:59:21,591 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-21 15:59:21,591 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 280 transitions, 3209 flow [2024-06-21 15:59:21,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:21,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:21,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:21,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 15:59:21,592 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:21,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:21,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1802387917, now seen corresponding path program 4 times [2024-06-21 15:59:21,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:21,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864151383] [2024-06-21 15:59:21,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:21,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:21,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:21,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:21,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:21,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864151383] [2024-06-21 15:59:21,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864151383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:21,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:21,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:59:21,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325425143] [2024-06-21 15:59:21,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:21,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:59:21,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:21,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:59:21,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:59:21,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:21,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 280 transitions, 3209 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:21,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:21,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:21,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:22,242 INFO L124 PetriNetUnfolderBase]: 2438/4273 cut-off events. [2024-06-21 15:59:22,242 INFO L125 PetriNetUnfolderBase]: For 259721/259721 co-relation queries the response was YES. [2024-06-21 15:59:22,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28220 conditions, 4273 events. 2438/4273 cut-off events. For 259721/259721 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 28397 event pairs, 536 based on Foata normal form. 1/4264 useless extension candidates. Maximal degree in co-relation 28116. Up to 3695 conditions per place. [2024-06-21 15:59:22,286 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 230 selfloop transitions, 61 changer transitions 0/301 dead transitions. [2024-06-21 15:59:22,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 301 transitions, 4029 flow [2024-06-21 15:59:22,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:59:22,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:59:22,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-21 15:59:22,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2024-06-21 15:59:22,287 INFO L175 Difference]: Start difference. First operand has 218 places, 280 transitions, 3209 flow. Second operand 6 states and 162 transitions. [2024-06-21 15:59:22,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 301 transitions, 4029 flow [2024-06-21 15:59:22,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 301 transitions, 3845 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 15:59:22,943 INFO L231 Difference]: Finished difference. Result has 220 places, 284 transitions, 3217 flow [2024-06-21 15:59:22,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3040, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3217, PETRI_PLACES=220, PETRI_TRANSITIONS=284} [2024-06-21 15:59:22,944 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 176 predicate places. [2024-06-21 15:59:22,944 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 284 transitions, 3217 flow [2024-06-21 15:59:22,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:22,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:22,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:22,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 15:59:22,945 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:22,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:22,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1718625701, now seen corresponding path program 5 times [2024-06-21 15:59:22,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:22,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787761232] [2024-06-21 15:59:22,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:22,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:23,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:23,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787761232] [2024-06-21 15:59:23,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787761232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:23,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:23,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:23,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534619502] [2024-06-21 15:59:23,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:23,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:23,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:23,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:23,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:23,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:23,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 284 transitions, 3217 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:23,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:23,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:23,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:23,597 INFO L124 PetriNetUnfolderBase]: 2443/4275 cut-off events. [2024-06-21 15:59:23,598 INFO L125 PetriNetUnfolderBase]: For 266454/266454 co-relation queries the response was YES. [2024-06-21 15:59:23,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28344 conditions, 4275 events. 2443/4275 cut-off events. For 266454/266454 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 28387 event pairs, 548 based on Foata normal form. 1/4271 useless extension candidates. Maximal degree in co-relation 28240. Up to 3701 conditions per place. [2024-06-21 15:59:23,642 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 226 selfloop transitions, 63 changer transitions 0/299 dead transitions. [2024-06-21 15:59:23,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 299 transitions, 4004 flow [2024-06-21 15:59:23,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:23,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:23,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 15:59:23,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946843853820598 [2024-06-21 15:59:23,643 INFO L175 Difference]: Start difference. First operand has 220 places, 284 transitions, 3217 flow. Second operand 7 states and 179 transitions. [2024-06-21 15:59:23,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 299 transitions, 4004 flow [2024-06-21 15:59:24,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 299 transitions, 3902 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-21 15:59:24,338 INFO L231 Difference]: Finished difference. Result has 225 places, 287 transitions, 3294 flow [2024-06-21 15:59:24,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3118, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3294, PETRI_PLACES=225, PETRI_TRANSITIONS=287} [2024-06-21 15:59:24,338 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-21 15:59:24,338 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 287 transitions, 3294 flow [2024-06-21 15:59:24,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:24,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:24,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:24,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 15:59:24,339 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:24,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:24,339 INFO L85 PathProgramCache]: Analyzing trace with hash -51890513, now seen corresponding path program 6 times [2024-06-21 15:59:24,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:24,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609348934] [2024-06-21 15:59:24,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:24,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:24,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:24,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:24,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:24,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609348934] [2024-06-21 15:59:24,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609348934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:24,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:24,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:24,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929300398] [2024-06-21 15:59:24,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:24,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:24,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:24,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:24,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:24,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:24,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 287 transitions, 3294 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:24,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:24,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:24,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:25,012 INFO L124 PetriNetUnfolderBase]: 2440/4274 cut-off events. [2024-06-21 15:59:25,012 INFO L125 PetriNetUnfolderBase]: For 271423/271423 co-relation queries the response was YES. [2024-06-21 15:59:25,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28372 conditions, 4274 events. 2440/4274 cut-off events. For 271423/271423 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 28456 event pairs, 544 based on Foata normal form. 1/4270 useless extension candidates. Maximal degree in co-relation 28267. Up to 3698 conditions per place. [2024-06-21 15:59:25,058 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 225 selfloop transitions, 64 changer transitions 0/299 dead transitions. [2024-06-21 15:59:25,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 299 transitions, 4036 flow [2024-06-21 15:59:25,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:25,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:25,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 15:59:25,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913621262458472 [2024-06-21 15:59:25,059 INFO L175 Difference]: Start difference. First operand has 225 places, 287 transitions, 3294 flow. Second operand 7 states and 178 transitions. [2024-06-21 15:59:25,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 299 transitions, 4036 flow [2024-06-21 15:59:25,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 299 transitions, 3922 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 15:59:25,758 INFO L231 Difference]: Finished difference. Result has 228 places, 287 transitions, 3314 flow [2024-06-21 15:59:25,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3180, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3314, PETRI_PLACES=228, PETRI_TRANSITIONS=287} [2024-06-21 15:59:25,758 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 184 predicate places. [2024-06-21 15:59:25,758 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 287 transitions, 3314 flow [2024-06-21 15:59:25,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:25,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:25,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:25,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 15:59:25,759 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:25,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:25,759 INFO L85 PathProgramCache]: Analyzing trace with hash -632748715, now seen corresponding path program 7 times [2024-06-21 15:59:25,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:25,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986188154] [2024-06-21 15:59:25,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:25,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:25,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:25,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:25,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986188154] [2024-06-21 15:59:25,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986188154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:25,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:25,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:25,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911228704] [2024-06-21 15:59:25,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:25,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:25,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:25,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:25,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:25,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:25,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 287 transitions, 3314 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:25,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:25,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:25,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:26,463 INFO L124 PetriNetUnfolderBase]: 2437/4270 cut-off events. [2024-06-21 15:59:26,463 INFO L125 PetriNetUnfolderBase]: For 276455/276455 co-relation queries the response was YES. [2024-06-21 15:59:26,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28374 conditions, 4270 events. 2437/4270 cut-off events. For 276455/276455 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 28398 event pairs, 544 based on Foata normal form. 1/4266 useless extension candidates. Maximal degree in co-relation 28267. Up to 3695 conditions per place. [2024-06-21 15:59:26,511 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 225 selfloop transitions, 65 changer transitions 0/300 dead transitions. [2024-06-21 15:59:26,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 300 transitions, 3924 flow [2024-06-21 15:59:26,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:59:26,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:59:26,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-21 15:59:26,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684754521963824 [2024-06-21 15:59:26,513 INFO L175 Difference]: Start difference. First operand has 228 places, 287 transitions, 3314 flow. Second operand 9 states and 220 transitions. [2024-06-21 15:59:26,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 300 transitions, 3924 flow [2024-06-21 15:59:27,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 300 transitions, 3737 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 15:59:27,038 INFO L231 Difference]: Finished difference. Result has 231 places, 287 transitions, 3263 flow [2024-06-21 15:59:27,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3127, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3263, PETRI_PLACES=231, PETRI_TRANSITIONS=287} [2024-06-21 15:59:27,038 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 187 predicate places. [2024-06-21 15:59:27,038 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 287 transitions, 3263 flow [2024-06-21 15:59:27,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:27,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:27,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:27,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 15:59:27,039 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:27,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:27,039 INFO L85 PathProgramCache]: Analyzing trace with hash 483936045, now seen corresponding path program 1 times [2024-06-21 15:59:27,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:27,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145319317] [2024-06-21 15:59:27,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:27,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:27,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:27,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145319317] [2024-06-21 15:59:27,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145319317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:27,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:27,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:59:27,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209194629] [2024-06-21 15:59:27,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:27,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:59:27,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:27,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:59:27,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:59:27,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-06-21 15:59:27,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 287 transitions, 3263 flow. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 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) [2024-06-21 15:59:27,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:27,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-06-21 15:59:27,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:27,700 INFO L124 PetriNetUnfolderBase]: 2344/4163 cut-off events. [2024-06-21 15:59:27,700 INFO L125 PetriNetUnfolderBase]: For 305477/305477 co-relation queries the response was YES. [2024-06-21 15:59:27,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28009 conditions, 4163 events. 2344/4163 cut-off events. For 305477/305477 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 28035 event pairs, 501 based on Foata normal form. 10/4130 useless extension candidates. Maximal degree in co-relation 27901. Up to 3469 conditions per place. [2024-06-21 15:59:27,744 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 232 selfloop transitions, 31 changer transitions 0/308 dead transitions. [2024-06-21 15:59:27,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 308 transitions, 3867 flow [2024-06-21 15:59:27,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:59:27,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:59:27,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-21 15:59:27,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6395348837209303 [2024-06-21 15:59:27,745 INFO L175 Difference]: Start difference. First operand has 231 places, 287 transitions, 3263 flow. Second operand 6 states and 165 transitions. [2024-06-21 15:59:27,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 308 transitions, 3867 flow [2024-06-21 15:59:28,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 308 transitions, 3677 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 15:59:28,392 INFO L231 Difference]: Finished difference. Result has 228 places, 288 transitions, 3157 flow [2024-06-21 15:59:28,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3073, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3157, PETRI_PLACES=228, PETRI_TRANSITIONS=288} [2024-06-21 15:59:28,392 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 184 predicate places. [2024-06-21 15:59:28,393 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 288 transitions, 3157 flow [2024-06-21 15:59:28,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 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) [2024-06-21 15:59:28,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:28,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:28,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 15:59:28,393 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:28,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:28,394 INFO L85 PathProgramCache]: Analyzing trace with hash -395965651, now seen corresponding path program 2 times [2024-06-21 15:59:28,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:28,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001760822] [2024-06-21 15:59:28,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:28,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:28,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:28,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:28,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001760822] [2024-06-21 15:59:28,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001760822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:28,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:28,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:28,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505032862] [2024-06-21 15:59:28,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:28,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:28,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:28,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:28,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:28,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-06-21 15:59:28,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 288 transitions, 3157 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:28,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:28,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-06-21 15:59:28,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:29,075 INFO L124 PetriNetUnfolderBase]: 2375/4204 cut-off events. [2024-06-21 15:59:29,075 INFO L125 PetriNetUnfolderBase]: For 313127/313127 co-relation queries the response was YES. [2024-06-21 15:59:29,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28267 conditions, 4204 events. 2375/4204 cut-off events. For 313127/313127 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 28370 event pairs, 511 based on Foata normal form. 9/4168 useless extension candidates. Maximal degree in co-relation 28158. Up to 3518 conditions per place. [2024-06-21 15:59:29,119 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 228 selfloop transitions, 31 changer transitions 0/304 dead transitions. [2024-06-21 15:59:29,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 304 transitions, 3741 flow [2024-06-21 15:59:29,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:29,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:29,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 15:59:29,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6013289036544851 [2024-06-21 15:59:29,120 INFO L175 Difference]: Start difference. First operand has 228 places, 288 transitions, 3157 flow. Second operand 7 states and 181 transitions. [2024-06-21 15:59:29,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 304 transitions, 3741 flow [2024-06-21 15:59:29,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 304 transitions, 3675 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 15:59:29,755 INFO L231 Difference]: Finished difference. Result has 231 places, 289 transitions, 3177 flow [2024-06-21 15:59:29,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3091, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3177, PETRI_PLACES=231, PETRI_TRANSITIONS=289} [2024-06-21 15:59:29,756 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 187 predicate places. [2024-06-21 15:59:29,756 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 289 transitions, 3177 flow [2024-06-21 15:59:29,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:29,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:29,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:29,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 15:59:29,757 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:29,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:29,757 INFO L85 PathProgramCache]: Analyzing trace with hash 442945769, now seen corresponding path program 3 times [2024-06-21 15:59:29,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:29,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617254286] [2024-06-21 15:59:29,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:29,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:29,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:29,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:29,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:29,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617254286] [2024-06-21 15:59:29,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617254286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:29,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:29,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:29,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957542886] [2024-06-21 15:59:29,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:29,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:29,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:29,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:29,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:29,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-06-21 15:59:29,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 289 transitions, 3177 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:29,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:29,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-06-21 15:59:29,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:30,510 INFO L124 PetriNetUnfolderBase]: 2377/4210 cut-off events. [2024-06-21 15:59:30,510 INFO L125 PetriNetUnfolderBase]: For 305669/305669 co-relation queries the response was YES. [2024-06-21 15:59:30,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28065 conditions, 4210 events. 2377/4210 cut-off events. For 305669/305669 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 28460 event pairs, 505 based on Foata normal form. 8/4173 useless extension candidates. Maximal degree in co-relation 27955. Up to 3458 conditions per place. [2024-06-21 15:59:30,549 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 230 selfloop transitions, 34 changer transitions 0/309 dead transitions. [2024-06-21 15:59:30,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 309 transitions, 3793 flow [2024-06-21 15:59:30,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:30,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:30,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 15:59:30,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959302325581395 [2024-06-21 15:59:30,550 INFO L175 Difference]: Start difference. First operand has 231 places, 289 transitions, 3177 flow. Second operand 8 states and 205 transitions. [2024-06-21 15:59:30,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 309 transitions, 3793 flow [2024-06-21 15:59:31,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 309 transitions, 3725 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 15:59:31,109 INFO L231 Difference]: Finished difference. Result has 234 places, 290 transitions, 3201 flow [2024-06-21 15:59:31,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3109, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3201, PETRI_PLACES=234, PETRI_TRANSITIONS=290} [2024-06-21 15:59:31,109 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 190 predicate places. [2024-06-21 15:59:31,109 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 290 transitions, 3201 flow [2024-06-21 15:59:31,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:31,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:31,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:31,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 15:59:31,110 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:31,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:31,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1466778297, now seen corresponding path program 1 times [2024-06-21 15:59:31,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:31,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220717921] [2024-06-21 15:59:31,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:31,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:31,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:31,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:31,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220717921] [2024-06-21 15:59:31,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220717921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:31,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:31,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:31,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298937864] [2024-06-21 15:59:31,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:31,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:31,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:31,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:31,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:31,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:31,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 290 transitions, 3201 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:31,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:31,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:31,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:31,847 INFO L124 PetriNetUnfolderBase]: 2527/4432 cut-off events. [2024-06-21 15:59:31,847 INFO L125 PetriNetUnfolderBase]: For 303389/303389 co-relation queries the response was YES. [2024-06-21 15:59:31,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29169 conditions, 4432 events. 2527/4432 cut-off events. For 303389/303389 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 29623 event pairs, 465 based on Foata normal form. 4/4435 useless extension candidates. Maximal degree in co-relation 29058. Up to 3807 conditions per place. [2024-06-21 15:59:31,893 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 282 selfloop transitions, 28 changer transitions 0/320 dead transitions. [2024-06-21 15:59:31,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 320 transitions, 4082 flow [2024-06-21 15:59:31,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:31,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:31,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-21 15:59:31,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6017441860465116 [2024-06-21 15:59:31,895 INFO L175 Difference]: Start difference. First operand has 234 places, 290 transitions, 3201 flow. Second operand 8 states and 207 transitions. [2024-06-21 15:59:31,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 320 transitions, 4082 flow [2024-06-21 15:59:32,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 320 transitions, 4004 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 15:59:32,480 INFO L231 Difference]: Finished difference. Result has 236 places, 293 transitions, 3238 flow [2024-06-21 15:59:32,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3123, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3238, PETRI_PLACES=236, PETRI_TRANSITIONS=293} [2024-06-21 15:59:32,480 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-21 15:59:32,480 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 293 transitions, 3238 flow [2024-06-21 15:59:32,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:32,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:32,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:32,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 15:59:32,481 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:32,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:32,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1116082325, now seen corresponding path program 2 times [2024-06-21 15:59:32,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:32,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050065516] [2024-06-21 15:59:32,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:32,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:32,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:32,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:32,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050065516] [2024-06-21 15:59:32,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050065516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:32,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:32,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:32,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108871590] [2024-06-21 15:59:32,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:32,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:32,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:32,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:32,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:32,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:32,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 293 transitions, 3238 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:32,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:32,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:32,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:33,263 INFO L124 PetriNetUnfolderBase]: 2507/4399 cut-off events. [2024-06-21 15:59:33,263 INFO L125 PetriNetUnfolderBase]: For 299318/299318 co-relation queries the response was YES. [2024-06-21 15:59:33,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28696 conditions, 4399 events. 2507/4399 cut-off events. For 299318/299318 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 29407 event pairs, 526 based on Foata normal form. 4/4402 useless extension candidates. Maximal degree in co-relation 28584. Up to 3881 conditions per place. [2024-06-21 15:59:33,304 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 284 selfloop transitions, 21 changer transitions 0/315 dead transitions. [2024-06-21 15:59:33,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 315 transitions, 3902 flow [2024-06-21 15:59:33,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:33,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:33,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-21 15:59:33,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5843023255813954 [2024-06-21 15:59:33,305 INFO L175 Difference]: Start difference. First operand has 236 places, 293 transitions, 3238 flow. Second operand 8 states and 201 transitions. [2024-06-21 15:59:33,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 315 transitions, 3902 flow [2024-06-21 15:59:34,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 315 transitions, 3811 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 15:59:34,105 INFO L231 Difference]: Finished difference. Result has 239 places, 293 transitions, 3195 flow [2024-06-21 15:59:34,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3147, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3195, PETRI_PLACES=239, PETRI_TRANSITIONS=293} [2024-06-21 15:59:34,106 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 195 predicate places. [2024-06-21 15:59:34,106 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 293 transitions, 3195 flow [2024-06-21 15:59:34,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:34,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:34,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:34,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 15:59:34,107 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:34,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:34,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1463916377, now seen corresponding path program 1 times [2024-06-21 15:59:34,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:34,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839558457] [2024-06-21 15:59:34,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:34,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:34,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:34,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:34,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:34,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839558457] [2024-06-21 15:59:34,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839558457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:34,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:34,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:34,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670558963] [2024-06-21 15:59:34,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:34,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:34,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:34,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:34,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:34,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:34,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 293 transitions, 3195 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:34,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:34,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:34,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:34,817 INFO L124 PetriNetUnfolderBase]: 2525/4430 cut-off events. [2024-06-21 15:59:34,817 INFO L125 PetriNetUnfolderBase]: For 304063/304063 co-relation queries the response was YES. [2024-06-21 15:59:34,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28848 conditions, 4430 events. 2525/4430 cut-off events. For 304063/304063 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 29650 event pairs, 525 based on Foata normal form. 2/4431 useless extension candidates. Maximal degree in co-relation 28735. Up to 3906 conditions per place. [2024-06-21 15:59:34,864 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 288 selfloop transitions, 24 changer transitions 0/322 dead transitions. [2024-06-21 15:59:34,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 322 transitions, 4111 flow [2024-06-21 15:59:34,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:34,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:34,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 15:59:34,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5901162790697675 [2024-06-21 15:59:34,865 INFO L175 Difference]: Start difference. First operand has 239 places, 293 transitions, 3195 flow. Second operand 8 states and 203 transitions. [2024-06-21 15:59:34,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 322 transitions, 4111 flow [2024-06-21 15:59:35,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 322 transitions, 4039 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 15:59:35,668 INFO L231 Difference]: Finished difference. Result has 239 places, 300 transitions, 3274 flow [2024-06-21 15:59:35,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3123, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3274, PETRI_PLACES=239, PETRI_TRANSITIONS=300} [2024-06-21 15:59:35,669 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 195 predicate places. [2024-06-21 15:59:35,669 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 300 transitions, 3274 flow [2024-06-21 15:59:35,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:35,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:35,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:35,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 15:59:35,670 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:35,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:35,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1182991033, now seen corresponding path program 3 times [2024-06-21 15:59:35,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:35,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133095731] [2024-06-21 15:59:35,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:35,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:35,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:35,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:35,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:35,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133095731] [2024-06-21 15:59:35,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133095731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:35,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:35,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:35,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343687089] [2024-06-21 15:59:35,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:35,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:35,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:35,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:35,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:35,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:35,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 300 transitions, 3274 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:35,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:35,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:35,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:36,377 INFO L124 PetriNetUnfolderBase]: 2541/4437 cut-off events. [2024-06-21 15:59:36,377 INFO L125 PetriNetUnfolderBase]: For 321596/321596 co-relation queries the response was YES. [2024-06-21 15:59:36,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29594 conditions, 4437 events. 2541/4437 cut-off events. For 321596/321596 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 29642 event pairs, 535 based on Foata normal form. 4/4436 useless extension candidates. Maximal degree in co-relation 29480. Up to 3818 conditions per place. [2024-06-21 15:59:36,428 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 247 selfloop transitions, 61 changer transitions 0/318 dead transitions. [2024-06-21 15:59:36,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 318 transitions, 4024 flow [2024-06-21 15:59:36,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:36,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:36,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 15:59:36,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5980066445182725 [2024-06-21 15:59:36,429 INFO L175 Difference]: Start difference. First operand has 239 places, 300 transitions, 3274 flow. Second operand 7 states and 180 transitions. [2024-06-21 15:59:36,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 318 transitions, 4024 flow [2024-06-21 15:59:37,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 318 transitions, 3950 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 15:59:37,381 INFO L231 Difference]: Finished difference. Result has 242 places, 303 transitions, 3432 flow [2024-06-21 15:59:37,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3200, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3432, PETRI_PLACES=242, PETRI_TRANSITIONS=303} [2024-06-21 15:59:37,381 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 198 predicate places. [2024-06-21 15:59:37,382 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 303 transitions, 3432 flow [2024-06-21 15:59:37,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:37,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:37,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:37,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 15:59:37,382 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:37,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:37,383 INFO L85 PathProgramCache]: Analyzing trace with hash -945374935, now seen corresponding path program 2 times [2024-06-21 15:59:37,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:37,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758996766] [2024-06-21 15:59:37,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:37,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:37,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:37,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:37,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:37,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758996766] [2024-06-21 15:59:37,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758996766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:37,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:37,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:37,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888827610] [2024-06-21 15:59:37,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:37,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:37,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:37,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:37,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:37,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:37,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 303 transitions, 3432 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:37,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:37,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:37,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:38,142 INFO L124 PetriNetUnfolderBase]: 2575/4492 cut-off events. [2024-06-21 15:59:38,142 INFO L125 PetriNetUnfolderBase]: For 333730/333730 co-relation queries the response was YES. [2024-06-21 15:59:38,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30545 conditions, 4492 events. 2575/4492 cut-off events. For 333730/333730 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 30027 event pairs, 538 based on Foata normal form. 2/4487 useless extension candidates. Maximal degree in co-relation 30429. Up to 3748 conditions per place. [2024-06-21 15:59:38,191 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 230 selfloop transitions, 95 changer transitions 0/335 dead transitions. [2024-06-21 15:59:38,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 335 transitions, 4828 flow [2024-06-21 15:59:38,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:38,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:38,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-21 15:59:38,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6212624584717608 [2024-06-21 15:59:38,193 INFO L175 Difference]: Start difference. First operand has 242 places, 303 transitions, 3432 flow. Second operand 7 states and 187 transitions. [2024-06-21 15:59:38,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 335 transitions, 4828 flow [2024-06-21 15:59:39,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 335 transitions, 4618 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-21 15:59:39,274 INFO L231 Difference]: Finished difference. Result has 245 places, 317 transitions, 3655 flow [2024-06-21 15:59:39,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3222, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3655, PETRI_PLACES=245, PETRI_TRANSITIONS=317} [2024-06-21 15:59:39,274 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-21 15:59:39,274 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 317 transitions, 3655 flow [2024-06-21 15:59:39,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:39,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:39,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:39,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 15:59:39,275 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:39,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:39,275 INFO L85 PathProgramCache]: Analyzing trace with hash -938708695, now seen corresponding path program 3 times [2024-06-21 15:59:39,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:39,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206044262] [2024-06-21 15:59:39,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:39,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:39,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:39,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:39,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206044262] [2024-06-21 15:59:39,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206044262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:39,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:39,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:39,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507980089] [2024-06-21 15:59:39,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:39,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:39,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:39,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:39,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:39,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:39,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 317 transitions, 3655 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:39,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:39,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:39,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:40,003 INFO L124 PetriNetUnfolderBase]: 2569/4484 cut-off events. [2024-06-21 15:59:40,003 INFO L125 PetriNetUnfolderBase]: For 335136/335136 co-relation queries the response was YES. [2024-06-21 15:59:40,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30670 conditions, 4484 events. 2569/4484 cut-off events. For 335136/335136 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 30050 event pairs, 538 based on Foata normal form. 2/4479 useless extension candidates. Maximal degree in co-relation 30552. Up to 3743 conditions per place. [2024-06-21 15:59:40,056 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 226 selfloop transitions, 98 changer transitions 0/334 dead transitions. [2024-06-21 15:59:40,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 334 transitions, 4685 flow [2024-06-21 15:59:40,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:40,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:40,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-21 15:59:40,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146179401993356 [2024-06-21 15:59:40,058 INFO L175 Difference]: Start difference. First operand has 245 places, 317 transitions, 3655 flow. Second operand 7 states and 185 transitions. [2024-06-21 15:59:40,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 334 transitions, 4685 flow [2024-06-21 15:59:41,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 334 transitions, 4548 flow, removed 61 selfloop flow, removed 1 redundant places. [2024-06-21 15:59:41,088 INFO L231 Difference]: Finished difference. Result has 251 places, 317 transitions, 3721 flow [2024-06-21 15:59:41,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3518, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3721, PETRI_PLACES=251, PETRI_TRANSITIONS=317} [2024-06-21 15:59:41,089 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 207 predicate places. [2024-06-21 15:59:41,089 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 317 transitions, 3721 flow [2024-06-21 15:59:41,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:41,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:41,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:41,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 15:59:41,090 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:41,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:41,090 INFO L85 PathProgramCache]: Analyzing trace with hash -938699767, now seen corresponding path program 1 times [2024-06-21 15:59:41,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:41,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328625749] [2024-06-21 15:59:41,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:41,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:41,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:41,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:41,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328625749] [2024-06-21 15:59:41,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328625749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:41,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:41,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:41,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092671565] [2024-06-21 15:59:41,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:41,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:41,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:41,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:41,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:41,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:41,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 317 transitions, 3721 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:41,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:41,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:41,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:41,852 INFO L124 PetriNetUnfolderBase]: 2585/4508 cut-off events. [2024-06-21 15:59:41,853 INFO L125 PetriNetUnfolderBase]: For 348517/348517 co-relation queries the response was YES. [2024-06-21 15:59:41,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30825 conditions, 4508 events. 2585/4508 cut-off events. For 348517/348517 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 30188 event pairs, 539 based on Foata normal form. 4/4505 useless extension candidates. Maximal degree in co-relation 30705. Up to 3905 conditions per place. [2024-06-21 15:59:41,909 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 262 selfloop transitions, 63 changer transitions 0/335 dead transitions. [2024-06-21 15:59:41,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 335 transitions, 4475 flow [2024-06-21 15:59:41,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:41,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:41,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 15:59:41,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5980066445182725 [2024-06-21 15:59:41,910 INFO L175 Difference]: Start difference. First operand has 251 places, 317 transitions, 3721 flow. Second operand 7 states and 180 transitions. [2024-06-21 15:59:41,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 335 transitions, 4475 flow [2024-06-21 15:59:42,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 335 transitions, 4276 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 15:59:42,597 INFO L231 Difference]: Finished difference. Result has 253 places, 320 transitions, 3728 flow [2024-06-21 15:59:42,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3522, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3728, PETRI_PLACES=253, PETRI_TRANSITIONS=320} [2024-06-21 15:59:42,597 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 209 predicate places. [2024-06-21 15:59:42,598 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 320 transitions, 3728 flow [2024-06-21 15:59:42,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:42,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:42,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:42,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 15:59:42,598 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:42,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:42,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1653961109, now seen corresponding path program 4 times [2024-06-21 15:59:42,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:42,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084718069] [2024-06-21 15:59:42,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:42,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:42,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:42,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:42,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:42,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084718069] [2024-06-21 15:59:42,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084718069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:42,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:42,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:42,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882022564] [2024-06-21 15:59:42,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:42,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:42,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:42,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:42,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:42,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:42,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 320 transitions, 3728 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:42,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:42,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:42,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:43,328 INFO L124 PetriNetUnfolderBase]: 2588/4497 cut-off events. [2024-06-21 15:59:43,328 INFO L125 PetriNetUnfolderBase]: For 352206/352206 co-relation queries the response was YES. [2024-06-21 15:59:43,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30849 conditions, 4497 events. 2588/4497 cut-off events. For 352206/352206 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 30103 event pairs, 567 based on Foata normal form. 4/4493 useless extension candidates. Maximal degree in co-relation 30728. Up to 3886 conditions per place. [2024-06-21 15:59:43,378 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 261 selfloop transitions, 64 changer transitions 0/335 dead transitions. [2024-06-21 15:59:43,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 335 transitions, 4518 flow [2024-06-21 15:59:43,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:43,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:43,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 15:59:43,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913621262458472 [2024-06-21 15:59:43,379 INFO L175 Difference]: Start difference. First operand has 253 places, 320 transitions, 3728 flow. Second operand 7 states and 178 transitions. [2024-06-21 15:59:43,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 335 transitions, 4518 flow [2024-06-21 15:59:44,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 335 transitions, 4334 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 15:59:44,128 INFO L231 Difference]: Finished difference. Result has 255 places, 323 transitions, 3796 flow [2024-06-21 15:59:44,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3544, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3796, PETRI_PLACES=255, PETRI_TRANSITIONS=323} [2024-06-21 15:59:44,129 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 211 predicate places. [2024-06-21 15:59:44,129 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 323 transitions, 3796 flow [2024-06-21 15:59:44,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:44,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:44,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:44,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 15:59:44,130 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:44,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:44,130 INFO L85 PathProgramCache]: Analyzing trace with hash -741351073, now seen corresponding path program 4 times [2024-06-21 15:59:44,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:44,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452673799] [2024-06-21 15:59:44,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:44,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:44,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:44,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:44,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452673799] [2024-06-21 15:59:44,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452673799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:44,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:44,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:44,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423687106] [2024-06-21 15:59:44,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:44,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:44,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:44,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:44,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:44,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:44,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 323 transitions, 3796 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:44,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:44,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:44,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:44,924 INFO L124 PetriNetUnfolderBase]: 2622/4550 cut-off events. [2024-06-21 15:59:44,925 INFO L125 PetriNetUnfolderBase]: For 364399/364399 co-relation queries the response was YES. [2024-06-21 15:59:44,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31573 conditions, 4550 events. 2622/4550 cut-off events. For 364399/364399 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 30490 event pairs, 577 based on Foata normal form. 2/4544 useless extension candidates. Maximal degree in co-relation 31451. Up to 3806 conditions per place. [2024-06-21 15:59:44,969 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 229 selfloop transitions, 111 changer transitions 0/350 dead transitions. [2024-06-21 15:59:44,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 350 transitions, 5398 flow [2024-06-21 15:59:44,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:44,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:44,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-21 15:59:44,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6212624584717608 [2024-06-21 15:59:44,970 INFO L175 Difference]: Start difference. First operand has 255 places, 323 transitions, 3796 flow. Second operand 7 states and 187 transitions. [2024-06-21 15:59:44,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 350 transitions, 5398 flow [2024-06-21 15:59:45,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 350 transitions, 5168 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-21 15:59:45,738 INFO L231 Difference]: Finished difference. Result has 257 places, 335 transitions, 4037 flow [2024-06-21 15:59:45,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3566, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4037, PETRI_PLACES=257, PETRI_TRANSITIONS=335} [2024-06-21 15:59:45,738 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-21 15:59:45,739 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 335 transitions, 4037 flow [2024-06-21 15:59:45,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:45,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:45,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:45,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 15:59:45,739 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:45,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:45,740 INFO L85 PathProgramCache]: Analyzing trace with hash -286087115, now seen corresponding path program 5 times [2024-06-21 15:59:45,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:45,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500220121] [2024-06-21 15:59:45,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:45,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:45,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:45,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:45,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:45,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500220121] [2024-06-21 15:59:45,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500220121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:45,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:45,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:45,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323657322] [2024-06-21 15:59:45,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:45,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:45,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:45,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:45,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:45,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:45,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 335 transitions, 4037 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:45,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:45,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:45,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:46,458 INFO L124 PetriNetUnfolderBase]: 2616/4542 cut-off events. [2024-06-21 15:59:46,458 INFO L125 PetriNetUnfolderBase]: For 363155/363155 co-relation queries the response was YES. [2024-06-21 15:59:46,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31300 conditions, 4542 events. 2616/4542 cut-off events. For 363155/363155 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 30420 event pairs, 577 based on Foata normal form. 2/4536 useless extension candidates. Maximal degree in co-relation 31177. Up to 3801 conditions per place. [2024-06-21 15:59:46,509 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 227 selfloop transitions, 112 changer transitions 0/349 dead transitions. [2024-06-21 15:59:46,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 349 transitions, 5239 flow [2024-06-21 15:59:46,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:46,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:46,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-21 15:59:46,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146179401993356 [2024-06-21 15:59:46,511 INFO L175 Difference]: Start difference. First operand has 257 places, 335 transitions, 4037 flow. Second operand 7 states and 185 transitions. [2024-06-21 15:59:46,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 349 transitions, 5239 flow [2024-06-21 15:59:47,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 349 transitions, 5037 flow, removed 73 selfloop flow, removed 2 redundant places. [2024-06-21 15:59:47,391 INFO L231 Difference]: Finished difference. Result has 262 places, 335 transitions, 4066 flow [2024-06-21 15:59:47,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3835, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4066, PETRI_PLACES=262, PETRI_TRANSITIONS=335} [2024-06-21 15:59:47,392 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 218 predicate places. [2024-06-21 15:59:47,392 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 335 transitions, 4066 flow [2024-06-21 15:59:47,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:47,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:47,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:47,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 15:59:47,393 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:47,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:47,393 INFO L85 PathProgramCache]: Analyzing trace with hash -632739787, now seen corresponding path program 6 times [2024-06-21 15:59:47,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:47,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403438052] [2024-06-21 15:59:47,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:47,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:47,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:47,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:47,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:47,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403438052] [2024-06-21 15:59:47,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403438052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:47,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:47,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:47,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394372731] [2024-06-21 15:59:47,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:47,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:47,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:47,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:47,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:47,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:47,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 335 transitions, 4066 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:47,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:47,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:47,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:48,108 INFO L124 PetriNetUnfolderBase]: 2610/4534 cut-off events. [2024-06-21 15:59:48,108 INFO L125 PetriNetUnfolderBase]: For 363050/363050 co-relation queries the response was YES. [2024-06-21 15:59:48,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31209 conditions, 4534 events. 2610/4534 cut-off events. For 363050/363050 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 30372 event pairs, 577 based on Foata normal form. 2/4528 useless extension candidates. Maximal degree in co-relation 31084. Up to 3796 conditions per place. [2024-06-21 15:59:48,159 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 222 selfloop transitions, 116 changer transitions 0/348 dead transitions. [2024-06-21 15:59:48,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 348 transitions, 5104 flow [2024-06-21 15:59:48,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:48,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:48,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 15:59:48,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6079734219269103 [2024-06-21 15:59:48,161 INFO L175 Difference]: Start difference. First operand has 262 places, 335 transitions, 4066 flow. Second operand 7 states and 183 transitions. [2024-06-21 15:59:48,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 348 transitions, 5104 flow [2024-06-21 15:59:49,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 348 transitions, 4792 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 15:59:49,102 INFO L231 Difference]: Finished difference. Result has 263 places, 335 transitions, 3993 flow [2024-06-21 15:59:49,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3754, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3993, PETRI_PLACES=263, PETRI_TRANSITIONS=335} [2024-06-21 15:59:49,103 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 219 predicate places. [2024-06-21 15:59:49,103 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 335 transitions, 3993 flow [2024-06-21 15:59:49,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:49,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:49,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:49,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 15:59:49,104 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:49,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:49,104 INFO L85 PathProgramCache]: Analyzing trace with hash 785796105, now seen corresponding path program 2 times [2024-06-21 15:59:49,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:49,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860314143] [2024-06-21 15:59:49,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:49,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:49,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:49,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:49,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860314143] [2024-06-21 15:59:49,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860314143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:49,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:49,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:49,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631914924] [2024-06-21 15:59:49,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:49,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:49,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:49,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:49,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:49,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:49,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 335 transitions, 3993 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:49,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:49,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:49,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:49,839 INFO L124 PetriNetUnfolderBase]: 2626/4568 cut-off events. [2024-06-21 15:59:49,839 INFO L125 PetriNetUnfolderBase]: For 378716/378716 co-relation queries the response was YES. [2024-06-21 15:59:49,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31362 conditions, 4568 events. 2626/4568 cut-off events. For 378716/378716 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 30628 event pairs, 555 based on Foata normal form. 4/4567 useless extension candidates. Maximal degree in co-relation 31237. Up to 3965 conditions per place. [2024-06-21 15:59:49,891 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 274 selfloop transitions, 66 changer transitions 0/350 dead transitions. [2024-06-21 15:59:49,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 350 transitions, 4775 flow [2024-06-21 15:59:49,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:49,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:49,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 15:59:49,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946843853820598 [2024-06-21 15:59:49,892 INFO L175 Difference]: Start difference. First operand has 263 places, 335 transitions, 3993 flow. Second operand 7 states and 179 transitions. [2024-06-21 15:59:49,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 350 transitions, 4775 flow [2024-06-21 15:59:50,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 350 transitions, 4471 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 15:59:50,795 INFO L231 Difference]: Finished difference. Result has 262 places, 338 transitions, 3907 flow [2024-06-21 15:59:50,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3689, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3907, PETRI_PLACES=262, PETRI_TRANSITIONS=338} [2024-06-21 15:59:50,795 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 218 predicate places. [2024-06-21 15:59:50,795 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 338 transitions, 3907 flow [2024-06-21 15:59:50,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:50,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:50,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:50,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 15:59:50,796 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:50,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:50,796 INFO L85 PathProgramCache]: Analyzing trace with hash 432477193, now seen corresponding path program 3 times [2024-06-21 15:59:50,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:50,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115596576] [2024-06-21 15:59:50,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:50,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:50,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:50,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:50,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:50,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115596576] [2024-06-21 15:59:50,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115596576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:50,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:50,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:50,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033117718] [2024-06-21 15:59:50,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:50,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:50,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:50,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:50,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:50,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:50,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 338 transitions, 3907 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:50,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:50,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:50,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:51,574 INFO L124 PetriNetUnfolderBase]: 2642/4600 cut-off events. [2024-06-21 15:59:51,574 INFO L125 PetriNetUnfolderBase]: For 388167/388167 co-relation queries the response was YES. [2024-06-21 15:59:51,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31569 conditions, 4600 events. 2642/4600 cut-off events. For 388167/388167 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 30939 event pairs, 559 based on Foata normal form. 4/4599 useless extension candidates. Maximal degree in co-relation 31444. Up to 3989 conditions per place. [2024-06-21 15:59:51,631 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 276 selfloop transitions, 67 changer transitions 0/353 dead transitions. [2024-06-21 15:59:51,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 353 transitions, 4701 flow [2024-06-21 15:59:51,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:51,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:51,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 15:59:51,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913621262458472 [2024-06-21 15:59:51,632 INFO L175 Difference]: Start difference. First operand has 262 places, 338 transitions, 3907 flow. Second operand 7 states and 178 transitions. [2024-06-21 15:59:51,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 353 transitions, 4701 flow [2024-06-21 15:59:52,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 353 transitions, 4505 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 15:59:52,427 INFO L231 Difference]: Finished difference. Result has 264 places, 341 transitions, 3937 flow [2024-06-21 15:59:52,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3711, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3937, PETRI_PLACES=264, PETRI_TRANSITIONS=341} [2024-06-21 15:59:52,428 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 220 predicate places. [2024-06-21 15:59:52,428 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 341 transitions, 3937 flow [2024-06-21 15:59:52,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:52,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:52,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:52,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 15:59:52,429 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:52,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:52,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1845314415, now seen corresponding path program 4 times [2024-06-21 15:59:52,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:52,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944804560] [2024-06-21 15:59:52,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:52,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:52,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:52,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:52,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:52,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944804560] [2024-06-21 15:59:52,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944804560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:52,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:52,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:52,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976444334] [2024-06-21 15:59:52,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:52,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:52,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:52,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:52,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:52,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:52,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 341 transitions, 3937 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:52,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:52,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:52,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:53,202 INFO L124 PetriNetUnfolderBase]: 2645/4609 cut-off events. [2024-06-21 15:59:53,203 INFO L125 PetriNetUnfolderBase]: For 389455/389455 co-relation queries the response was YES. [2024-06-21 15:59:53,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31529 conditions, 4609 events. 2645/4609 cut-off events. For 389455/389455 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 31030 event pairs, 546 based on Foata normal form. 4/4608 useless extension candidates. Maximal degree in co-relation 31403. Up to 3942 conditions per place. [2024-06-21 15:59:53,254 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 271 selfloop transitions, 78 changer transitions 0/359 dead transitions. [2024-06-21 15:59:53,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 359 transitions, 4787 flow [2024-06-21 15:59:53,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:53,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:53,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 15:59:53,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946843853820598 [2024-06-21 15:59:53,256 INFO L175 Difference]: Start difference. First operand has 264 places, 341 transitions, 3937 flow. Second operand 7 states and 179 transitions. [2024-06-21 15:59:53,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 359 transitions, 4787 flow [2024-06-21 15:59:54,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 359 transitions, 4583 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-21 15:59:54,240 INFO L231 Difference]: Finished difference. Result has 267 places, 346 transitions, 4041 flow [2024-06-21 15:59:54,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3733, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4041, PETRI_PLACES=267, PETRI_TRANSITIONS=346} [2024-06-21 15:59:54,240 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 223 predicate places. [2024-06-21 15:59:54,241 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 346 transitions, 4041 flow [2024-06-21 15:59:54,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:54,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:54,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:54,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 15:59:54,241 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:54,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:54,242 INFO L85 PathProgramCache]: Analyzing trace with hash 532829328, now seen corresponding path program 1 times [2024-06-21 15:59:54,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:54,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551004502] [2024-06-21 15:59:54,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:54,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:54,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:54,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:54,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:54,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551004502] [2024-06-21 15:59:54,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551004502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:54,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:54,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:54,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596126110] [2024-06-21 15:59:54,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:54,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:54,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:54,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:54,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:54,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:54,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 346 transitions, 4041 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:54,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:54,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:54,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:55,026 INFO L124 PetriNetUnfolderBase]: 2679/4670 cut-off events. [2024-06-21 15:59:55,026 INFO L125 PetriNetUnfolderBase]: For 410910/410910 co-relation queries the response was YES. [2024-06-21 15:59:55,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32795 conditions, 4670 events. 2679/4670 cut-off events. For 410910/410910 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 31500 event pairs, 444 based on Foata normal form. 2/4664 useless extension candidates. Maximal degree in co-relation 32667. Up to 3923 conditions per place. [2024-06-21 15:59:55,080 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 316 selfloop transitions, 51 changer transitions 0/377 dead transitions. [2024-06-21 15:59:55,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 377 transitions, 5429 flow [2024-06-21 15:59:55,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:55,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:55,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-21 15:59:55,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6245847176079734 [2024-06-21 15:59:55,081 INFO L175 Difference]: Start difference. First operand has 267 places, 346 transitions, 4041 flow. Second operand 7 states and 188 transitions. [2024-06-21 15:59:55,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 377 transitions, 5429 flow [2024-06-21 15:59:56,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 377 transitions, 5247 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-21 15:59:56,046 INFO L231 Difference]: Finished difference. Result has 271 places, 352 transitions, 4216 flow [2024-06-21 15:59:56,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3859, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4216, PETRI_PLACES=271, PETRI_TRANSITIONS=352} [2024-06-21 15:59:56,047 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 227 predicate places. [2024-06-21 15:59:56,047 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 352 transitions, 4216 flow [2024-06-21 15:59:56,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:56,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:56,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:56,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 15:59:56,047 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:56,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:56,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1664164180, now seen corresponding path program 2 times [2024-06-21 15:59:56,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:56,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537055368] [2024-06-21 15:59:56,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:56,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:56,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:56,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:56,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537055368] [2024-06-21 15:59:56,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537055368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:56,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:56,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:56,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703808289] [2024-06-21 15:59:56,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:56,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:56,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:56,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:56,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:56,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:56,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 352 transitions, 4216 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:56,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:56,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:56,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:56,889 INFO L124 PetriNetUnfolderBase]: 2700/4701 cut-off events. [2024-06-21 15:59:56,889 INFO L125 PetriNetUnfolderBase]: For 430447/430447 co-relation queries the response was YES. [2024-06-21 15:59:56,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33572 conditions, 4701 events. 2700/4701 cut-off events. For 430447/430447 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 31686 event pairs, 450 based on Foata normal form. 2/4695 useless extension candidates. Maximal degree in co-relation 33442. Up to 3943 conditions per place. [2024-06-21 15:59:56,939 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 313 selfloop transitions, 55 changer transitions 0/378 dead transitions. [2024-06-21 15:59:56,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 378 transitions, 5528 flow [2024-06-21 15:59:56,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:56,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:56,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-21 15:59:56,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146179401993356 [2024-06-21 15:59:56,940 INFO L175 Difference]: Start difference. First operand has 271 places, 352 transitions, 4216 flow. Second operand 7 states and 185 transitions. [2024-06-21 15:59:56,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 378 transitions, 5528 flow [2024-06-21 15:59:58,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 378 transitions, 5311 flow, removed 89 selfloop flow, removed 2 redundant places. [2024-06-21 15:59:58,053 INFO L231 Difference]: Finished difference. Result has 276 places, 356 transitions, 4286 flow [2024-06-21 15:59:58,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4049, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4286, PETRI_PLACES=276, PETRI_TRANSITIONS=356} [2024-06-21 15:59:58,053 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 232 predicate places. [2024-06-21 15:59:58,053 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 356 transitions, 4286 flow [2024-06-21 15:59:58,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:58,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:58,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:58,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 15:59:58,054 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:58,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:58,054 INFO L85 PathProgramCache]: Analyzing trace with hash 569433514, now seen corresponding path program 3 times [2024-06-21 15:59:58,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:58,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316542235] [2024-06-21 15:59:58,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:58,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:58,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:58,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:58,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316542235] [2024-06-21 15:59:58,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316542235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:58,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:58,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:58,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764860895] [2024-06-21 15:59:58,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:58,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:58,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:58,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:58,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:58,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 15:59:58,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 356 transitions, 4286 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:58,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:58,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 15:59:58,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:58,863 INFO L124 PetriNetUnfolderBase]: 2695/4694 cut-off events. [2024-06-21 15:59:58,863 INFO L125 PetriNetUnfolderBase]: For 428411/428411 co-relation queries the response was YES. [2024-06-21 15:59:58,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33221 conditions, 4694 events. 2695/4694 cut-off events. For 428411/428411 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 31815 event pairs, 545 based on Foata normal form. 2/4681 useless extension candidates. Maximal degree in co-relation 33089. Up to 4047 conditions per place. [2024-06-21 15:59:58,918 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 324 selfloop transitions, 41 changer transitions 0/375 dead transitions. [2024-06-21 15:59:58,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 375 transitions, 5240 flow [2024-06-21 15:59:58,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:59:58,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:59:58,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-21 15:59:58,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624031007751938 [2024-06-21 15:59:58,919 INFO L175 Difference]: Start difference. First operand has 276 places, 356 transitions, 4286 flow. Second operand 6 states and 161 transitions. [2024-06-21 15:59:58,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 375 transitions, 5240 flow [2024-06-21 16:00:00,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 375 transitions, 5056 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-21 16:00:00,014 INFO L231 Difference]: Finished difference. Result has 279 places, 356 transitions, 4189 flow [2024-06-21 16:00:00,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4102, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4189, PETRI_PLACES=279, PETRI_TRANSITIONS=356} [2024-06-21 16:00:00,015 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 235 predicate places. [2024-06-21 16:00:00,015 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 356 transitions, 4189 flow [2024-06-21 16:00:00,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:00,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:00,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:00,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 16:00:00,015 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:00,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:00,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1084231340, now seen corresponding path program 4 times [2024-06-21 16:00:00,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:00,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389484580] [2024-06-21 16:00:00,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:00,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:00,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:00,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:00,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:00,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389484580] [2024-06-21 16:00:00,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389484580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:00,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:00,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:00:00,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688713471] [2024-06-21 16:00:00,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:00,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:00:00,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:00,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:00:00,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:00:00,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:00:00,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 356 transitions, 4189 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:00,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:00,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:00:00,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:00,887 INFO L124 PetriNetUnfolderBase]: 2703/4713 cut-off events. [2024-06-21 16:00:00,887 INFO L125 PetriNetUnfolderBase]: For 436506/436506 co-relation queries the response was YES. [2024-06-21 16:00:00,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33244 conditions, 4713 events. 2703/4713 cut-off events. For 436506/436506 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 31944 event pairs, 554 based on Foata normal form. 2/4707 useless extension candidates. Maximal degree in co-relation 33111. Up to 4096 conditions per place. [2024-06-21 16:00:00,939 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 321 selfloop transitions, 41 changer transitions 0/372 dead transitions. [2024-06-21 16:00:00,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 372 transitions, 5015 flow [2024-06-21 16:00:00,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:00:00,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:00:00,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-21 16:00:00,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2024-06-21 16:00:00,940 INFO L175 Difference]: Start difference. First operand has 279 places, 356 transitions, 4189 flow. Second operand 6 states and 158 transitions. [2024-06-21 16:00:00,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 372 transitions, 5015 flow [2024-06-21 16:00:02,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 372 transitions, 4908 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 16:00:02,115 INFO L231 Difference]: Finished difference. Result has 280 places, 358 transitions, 4241 flow [2024-06-21 16:00:02,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4088, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4241, PETRI_PLACES=280, PETRI_TRANSITIONS=358} [2024-06-21 16:00:02,115 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 236 predicate places. [2024-06-21 16:00:02,116 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 358 transitions, 4241 flow [2024-06-21 16:00:02,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:02,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:02,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:02,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 16:00:02,116 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:02,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:02,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1313857712, now seen corresponding path program 5 times [2024-06-21 16:00:02,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:02,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880384455] [2024-06-21 16:00:02,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:02,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:02,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:02,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:02,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:02,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880384455] [2024-06-21 16:00:02,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880384455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:02,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:02,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:00:02,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213065061] [2024-06-21 16:00:02,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:02,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:00:02,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:02,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:00:02,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:00:02,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:00:02,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 358 transitions, 4241 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:02,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:02,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:00:02,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:02,950 INFO L124 PetriNetUnfolderBase]: 2698/4707 cut-off events. [2024-06-21 16:00:02,951 INFO L125 PetriNetUnfolderBase]: For 436691/436691 co-relation queries the response was YES. [2024-06-21 16:00:02,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33046 conditions, 4707 events. 2698/4707 cut-off events. For 436691/436691 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 31871 event pairs, 548 based on Foata normal form. 2/4704 useless extension candidates. Maximal degree in co-relation 32912. Up to 4066 conditions per place. [2024-06-21 16:00:03,007 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 314 selfloop transitions, 52 changer transitions 0/376 dead transitions. [2024-06-21 16:00:03,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 376 transitions, 5197 flow [2024-06-21 16:00:03,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:00:03,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:00:03,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-21 16:00:03,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-21 16:00:03,008 INFO L175 Difference]: Start difference. First operand has 280 places, 358 transitions, 4241 flow. Second operand 8 states and 204 transitions. [2024-06-21 16:00:03,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 376 transitions, 5197 flow [2024-06-21 16:00:04,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 376 transitions, 5020 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-21 16:00:04,044 INFO L231 Difference]: Finished difference. Result has 284 places, 358 transitions, 4173 flow [2024-06-21 16:00:04,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4064, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4173, PETRI_PLACES=284, PETRI_TRANSITIONS=358} [2024-06-21 16:00:04,045 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 240 predicate places. [2024-06-21 16:00:04,045 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 358 transitions, 4173 flow [2024-06-21 16:00:04,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:04,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:04,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:04,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 16:00:04,045 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:04,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:04,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1102243122, now seen corresponding path program 6 times [2024-06-21 16:00:04,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:04,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161027828] [2024-06-21 16:00:04,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:04,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:04,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:04,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:04,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161027828] [2024-06-21 16:00:04,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161027828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:04,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:04,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:00:04,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425483664] [2024-06-21 16:00:04,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:04,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:00:04,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:04,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:00:04,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:00:04,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:00:04,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 358 transitions, 4173 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:04,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:04,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:00:04,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:04,963 INFO L124 PetriNetUnfolderBase]: 2693/4700 cut-off events. [2024-06-21 16:00:04,963 INFO L125 PetriNetUnfolderBase]: For 435258/435258 co-relation queries the response was YES. [2024-06-21 16:00:04,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32733 conditions, 4700 events. 2693/4700 cut-off events. For 435258/435258 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 31886 event pairs, 549 based on Foata normal form. 2/4697 useless extension candidates. Maximal degree in co-relation 32598. Up to 4082 conditions per place. [2024-06-21 16:00:05,012 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 318 selfloop transitions, 46 changer transitions 0/374 dead transitions. [2024-06-21 16:00:05,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 374 transitions, 4939 flow [2024-06-21 16:00:05,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:00:05,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:00:05,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-21 16:00:05,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-21 16:00:05,014 INFO L175 Difference]: Start difference. First operand has 284 places, 358 transitions, 4173 flow. Second operand 8 states and 204 transitions. [2024-06-21 16:00:05,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 374 transitions, 4939 flow [2024-06-21 16:00:06,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 374 transitions, 4759 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 16:00:06,329 INFO L231 Difference]: Finished difference. Result has 285 places, 358 transitions, 4090 flow [2024-06-21 16:00:06,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3993, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4090, PETRI_PLACES=285, PETRI_TRANSITIONS=358} [2024-06-21 16:00:06,329 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 241 predicate places. [2024-06-21 16:00:06,329 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 358 transitions, 4090 flow [2024-06-21 16:00:06,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:06,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:06,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:06,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 16:00:06,330 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:06,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:06,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1327520432, now seen corresponding path program 1 times [2024-06-21 16:00:06,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:06,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098896095] [2024-06-21 16:00:06,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:06,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:06,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:06,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:06,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:06,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098896095] [2024-06-21 16:00:06,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098896095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:06,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:06,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:06,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152556651] [2024-06-21 16:00:06,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:06,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:06,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:06,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:06,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:06,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:00:06,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 358 transitions, 4090 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:06,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:06,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:00:06,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:07,201 INFO L124 PetriNetUnfolderBase]: 2698/4718 cut-off events. [2024-06-21 16:00:07,201 INFO L125 PetriNetUnfolderBase]: For 438322/438322 co-relation queries the response was YES. [2024-06-21 16:00:07,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32738 conditions, 4718 events. 2698/4718 cut-off events. For 438322/438322 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 31976 event pairs, 535 based on Foata normal form. 1/4715 useless extension candidates. Maximal degree in co-relation 32602. Up to 4135 conditions per place. [2024-06-21 16:00:07,259 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 353 selfloop transitions, 28 changer transitions 0/391 dead transitions. [2024-06-21 16:00:07,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 391 transitions, 4983 flow [2024-06-21 16:00:07,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:00:07,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:00:07,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-21 16:00:07,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.622093023255814 [2024-06-21 16:00:07,261 INFO L175 Difference]: Start difference. First operand has 285 places, 358 transitions, 4090 flow. Second operand 8 states and 214 transitions. [2024-06-21 16:00:07,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 391 transitions, 4983 flow [2024-06-21 16:00:08,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 391 transitions, 4871 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 16:00:08,798 INFO L231 Difference]: Finished difference. Result has 285 places, 361 transitions, 4101 flow [2024-06-21 16:00:08,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3978, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4101, PETRI_PLACES=285, PETRI_TRANSITIONS=361} [2024-06-21 16:00:08,798 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 241 predicate places. [2024-06-21 16:00:08,799 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 361 transitions, 4101 flow [2024-06-21 16:00:08,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:08,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:08,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:08,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 16:00:08,799 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:08,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:08,799 INFO L85 PathProgramCache]: Analyzing trace with hash -943899892, now seen corresponding path program 2 times [2024-06-21 16:00:08,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:08,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688348269] [2024-06-21 16:00:08,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:08,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:08,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:08,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:08,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:08,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688348269] [2024-06-21 16:00:08,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688348269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:08,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:08,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:00:08,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667754232] [2024-06-21 16:00:08,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:08,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:00:08,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:08,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:00:08,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:00:08,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:00:08,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 361 transitions, 4101 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:08,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:08,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:00:08,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:09,684 INFO L124 PetriNetUnfolderBase]: 2711/4730 cut-off events. [2024-06-21 16:00:09,685 INFO L125 PetriNetUnfolderBase]: For 451826/451826 co-relation queries the response was YES. [2024-06-21 16:00:09,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33047 conditions, 4730 events. 2711/4730 cut-off events. For 451826/451826 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 32129 event pairs, 551 based on Foata normal form. 1/4723 useless extension candidates. Maximal degree in co-relation 32910. Up to 4016 conditions per place. [2024-06-21 16:00:09,737 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 288 selfloop transitions, 83 changer transitions 0/381 dead transitions. [2024-06-21 16:00:09,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 381 transitions, 5187 flow [2024-06-21 16:00:09,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:00:09,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:00:09,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-21 16:00:09,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6317829457364341 [2024-06-21 16:00:09,739 INFO L175 Difference]: Start difference. First operand has 285 places, 361 transitions, 4101 flow. Second operand 6 states and 163 transitions. [2024-06-21 16:00:09,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 381 transitions, 5187 flow [2024-06-21 16:00:11,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 381 transitions, 5101 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 16:00:11,498 INFO L231 Difference]: Finished difference. Result has 285 places, 367 transitions, 4320 flow [2024-06-21 16:00:11,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4015, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4320, PETRI_PLACES=285, PETRI_TRANSITIONS=367} [2024-06-21 16:00:11,498 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 241 predicate places. [2024-06-21 16:00:11,498 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 367 transitions, 4320 flow [2024-06-21 16:00:11,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:11,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:11,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:11,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 16:00:11,499 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:11,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:11,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1904877672, now seen corresponding path program 3 times [2024-06-21 16:00:11,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:11,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397288519] [2024-06-21 16:00:11,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:11,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:11,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:11,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:11,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:11,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397288519] [2024-06-21 16:00:11,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397288519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:11,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:11,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:00:11,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545777379] [2024-06-21 16:00:11,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:11,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:00:11,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:11,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:00:11,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:00:11,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:00:11,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 367 transitions, 4320 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:11,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:11,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:00:11,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:12,295 INFO L124 PetriNetUnfolderBase]: 2708/4727 cut-off events. [2024-06-21 16:00:12,295 INFO L125 PetriNetUnfolderBase]: For 456937/456937 co-relation queries the response was YES. [2024-06-21 16:00:12,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33159 conditions, 4727 events. 2708/4727 cut-off events. For 456937/456937 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 32132 event pairs, 548 based on Foata normal form. 1/4723 useless extension candidates. Maximal degree in co-relation 33021. Up to 4013 conditions per place. [2024-06-21 16:00:12,357 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 283 selfloop transitions, 89 changer transitions 0/382 dead transitions. [2024-06-21 16:00:12,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 382 transitions, 5100 flow [2024-06-21 16:00:12,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:00:12,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:00:12,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-21 16:00:12,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-21 16:00:12,358 INFO L175 Difference]: Start difference. First operand has 285 places, 367 transitions, 4320 flow. Second operand 8 states and 208 transitions. [2024-06-21 16:00:12,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 382 transitions, 5100 flow [2024-06-21 16:00:14,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 382 transitions, 5000 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-21 16:00:14,282 INFO L231 Difference]: Finished difference. Result has 290 places, 367 transitions, 4409 flow [2024-06-21 16:00:14,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4220, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4409, PETRI_PLACES=290, PETRI_TRANSITIONS=367} [2024-06-21 16:00:14,282 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 246 predicate places. [2024-06-21 16:00:14,282 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 367 transitions, 4409 flow [2024-06-21 16:00:14,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:14,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:14,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:14,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 16:00:14,283 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:14,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:14,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1425452448, now seen corresponding path program 1 times [2024-06-21 16:00:14,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:14,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790378491] [2024-06-21 16:00:14,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:14,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:14,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:14,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:14,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790378491] [2024-06-21 16:00:14,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790378491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:14,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:14,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:00:14,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321269260] [2024-06-21 16:00:14,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:14,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:00:14,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:14,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:00:14,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:00:14,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:00:14,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 367 transitions, 4409 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:14,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:14,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:00:14,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:15,162 INFO L124 PetriNetUnfolderBase]: 2721/4745 cut-off events. [2024-06-21 16:00:15,162 INFO L125 PetriNetUnfolderBase]: For 462151/462151 co-relation queries the response was YES. [2024-06-21 16:00:15,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33609 conditions, 4745 events. 2721/4745 cut-off events. For 462151/462151 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 32251 event pairs, 557 based on Foata normal form. 1/4735 useless extension candidates. Maximal degree in co-relation 33470. Up to 4048 conditions per place. [2024-06-21 16:00:15,214 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 295 selfloop transitions, 82 changer transitions 0/387 dead transitions. [2024-06-21 16:00:15,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 387 transitions, 5483 flow [2024-06-21 16:00:15,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:00:15,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:00:15,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-21 16:00:15,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6317829457364341 [2024-06-21 16:00:15,215 INFO L175 Difference]: Start difference. First operand has 290 places, 367 transitions, 4409 flow. Second operand 6 states and 163 transitions. [2024-06-21 16:00:15,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 387 transitions, 5483 flow [2024-06-21 16:00:17,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 387 transitions, 5233 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 16:00:17,097 INFO L231 Difference]: Finished difference. Result has 288 places, 373 transitions, 4438 flow [2024-06-21 16:00:17,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4161, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4438, PETRI_PLACES=288, PETRI_TRANSITIONS=373} [2024-06-21 16:00:17,098 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 244 predicate places. [2024-06-21 16:00:17,098 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 373 transitions, 4438 flow [2024-06-21 16:00:17,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:17,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:17,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:17,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 16:00:17,099 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:17,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:17,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1378477646, now seen corresponding path program 2 times [2024-06-21 16:00:17,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:17,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053537425] [2024-06-21 16:00:17,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:17,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:17,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:17,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:17,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:17,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053537425] [2024-06-21 16:00:17,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053537425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:17,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:17,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:00:17,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047847064] [2024-06-21 16:00:17,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:17,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:00:17,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:17,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:00:17,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:00:17,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:00:17,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 373 transitions, 4438 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:17,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:17,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:00:17,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:17,935 INFO L124 PetriNetUnfolderBase]: 2734/4769 cut-off events. [2024-06-21 16:00:17,936 INFO L125 PetriNetUnfolderBase]: For 467963/467963 co-relation queries the response was YES. [2024-06-21 16:00:17,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34108 conditions, 4769 events. 2734/4769 cut-off events. For 467963/467963 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 32423 event pairs, 551 based on Foata normal form. 1/4765 useless extension candidates. Maximal degree in co-relation 33969. Up to 4063 conditions per place. [2024-06-21 16:00:17,995 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 290 selfloop transitions, 96 changer transitions 0/396 dead transitions. [2024-06-21 16:00:17,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 396 transitions, 5738 flow [2024-06-21 16:00:17,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:00:17,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:00:17,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-21 16:00:17,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6191860465116279 [2024-06-21 16:00:17,996 INFO L175 Difference]: Start difference. First operand has 288 places, 373 transitions, 4438 flow. Second operand 8 states and 213 transitions. [2024-06-21 16:00:17,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 396 transitions, 5738 flow [2024-06-21 16:00:19,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 396 transitions, 5650 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-21 16:00:19,955 INFO L231 Difference]: Finished difference. Result has 294 places, 379 transitions, 4661 flow [2024-06-21 16:00:19,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4362, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4661, PETRI_PLACES=294, PETRI_TRANSITIONS=379} [2024-06-21 16:00:19,956 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 250 predicate places. [2024-06-21 16:00:19,956 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 379 transitions, 4661 flow [2024-06-21 16:00:19,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:19,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:19,956 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] [2024-06-21 16:00:19,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 16:00:19,956 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:19,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:19,957 INFO L85 PathProgramCache]: Analyzing trace with hash -327727304, now seen corresponding path program 3 times [2024-06-21 16:00:19,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:19,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467055154] [2024-06-21 16:00:19,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:19,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:19,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:20,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:20,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467055154] [2024-06-21 16:00:20,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467055154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:20,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:20,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:00:20,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739672107] [2024-06-21 16:00:20,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:20,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:00:20,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:20,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:00:20,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:00:20,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:00:20,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 379 transitions, 4661 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:20,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:20,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:00:20,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:20,848 INFO L124 PetriNetUnfolderBase]: 2731/4765 cut-off events. [2024-06-21 16:00:20,849 INFO L125 PetriNetUnfolderBase]: For 472762/472762 co-relation queries the response was YES. [2024-06-21 16:00:20,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34302 conditions, 4765 events. 2731/4765 cut-off events. For 472762/472762 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 32447 event pairs, 551 based on Foata normal form. 1/4761 useless extension candidates. Maximal degree in co-relation 34161. Up to 4060 conditions per place. [2024-06-21 16:00:20,901 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 286 selfloop transitions, 100 changer transitions 0/396 dead transitions. [2024-06-21 16:00:20,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 396 transitions, 5665 flow [2024-06-21 16:00:20,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:00:20,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:00:20,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-21 16:00:20,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.599483204134367 [2024-06-21 16:00:20,902 INFO L175 Difference]: Start difference. First operand has 294 places, 379 transitions, 4661 flow. Second operand 9 states and 232 transitions. [2024-06-21 16:00:20,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 396 transitions, 5665 flow [2024-06-21 16:00:22,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 396 transitions, 5424 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 16:00:22,658 INFO L231 Difference]: Finished difference. Result has 297 places, 379 transitions, 4633 flow [2024-06-21 16:00:22,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4422, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4633, PETRI_PLACES=297, PETRI_TRANSITIONS=379} [2024-06-21 16:00:22,659 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 253 predicate places. [2024-06-21 16:00:22,659 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 379 transitions, 4633 flow [2024-06-21 16:00:22,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:22,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:22,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:22,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 16:00:22,660 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:22,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:22,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1664155252, now seen corresponding path program 1 times [2024-06-21 16:00:22,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:22,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106577484] [2024-06-21 16:00:22,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:22,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:22,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:22,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:22,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:22,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106577484] [2024-06-21 16:00:22,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106577484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:22,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:22,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:00:22,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322819014] [2024-06-21 16:00:22,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:22,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:00:22,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:22,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:00:22,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:00:22,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:00:22,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 379 transitions, 4633 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:22,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:22,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:00:22,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:23,503 INFO L124 PetriNetUnfolderBase]: 2751/4803 cut-off events. [2024-06-21 16:00:23,503 INFO L125 PetriNetUnfolderBase]: For 496231/496231 co-relation queries the response was YES. [2024-06-21 16:00:23,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34476 conditions, 4803 events. 2751/4803 cut-off events. For 496231/496231 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 32672 event pairs, 472 based on Foata normal form. 6/4798 useless extension candidates. Maximal degree in co-relation 34335. Up to 3936 conditions per place. [2024-06-21 16:00:23,564 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 358 selfloop transitions, 35 changer transitions 0/403 dead transitions. [2024-06-21 16:00:23,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 403 transitions, 5741 flow [2024-06-21 16:00:23,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:00:23,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:00:23,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-21 16:00:23,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624031007751938 [2024-06-21 16:00:23,566 INFO L175 Difference]: Start difference. First operand has 297 places, 379 transitions, 4633 flow. Second operand 6 states and 161 transitions. [2024-06-21 16:00:23,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 403 transitions, 5741 flow [2024-06-21 16:00:25,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 403 transitions, 5513 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 16:00:25,583 INFO L231 Difference]: Finished difference. Result has 294 places, 380 transitions, 4501 flow [2024-06-21 16:00:25,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4407, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4501, PETRI_PLACES=294, PETRI_TRANSITIONS=380} [2024-06-21 16:00:25,584 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 250 predicate places. [2024-06-21 16:00:25,584 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 380 transitions, 4501 flow [2024-06-21 16:00:25,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:25,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:25,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:25,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 16:00:25,585 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:25,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:25,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1818907790, now seen corresponding path program 2 times [2024-06-21 16:00:25,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:25,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028212204] [2024-06-21 16:00:25,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:25,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:25,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:25,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:25,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:25,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028212204] [2024-06-21 16:00:25,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028212204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:25,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:25,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:00:25,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237017766] [2024-06-21 16:00:25,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:25,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:00:25,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:25,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:00:25,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:00:25,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:00:25,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 380 transitions, 4501 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:25,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:25,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:00:25,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:26,475 INFO L124 PetriNetUnfolderBase]: 2771/4837 cut-off events. [2024-06-21 16:00:26,475 INFO L125 PetriNetUnfolderBase]: For 496659/496659 co-relation queries the response was YES. [2024-06-21 16:00:26,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34590 conditions, 4837 events. 2771/4837 cut-off events. For 496659/496659 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 33005 event pairs, 543 based on Foata normal form. 6/4838 useless extension candidates. Maximal degree in co-relation 34449. Up to 4169 conditions per place. [2024-06-21 16:00:26,537 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 354 selfloop transitions, 34 changer transitions 0/398 dead transitions. [2024-06-21 16:00:26,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 398 transitions, 5367 flow [2024-06-21 16:00:26,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:00:26,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:00:26,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-21 16:00:26,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6201550387596899 [2024-06-21 16:00:26,538 INFO L175 Difference]: Start difference. First operand has 294 places, 380 transitions, 4501 flow. Second operand 6 states and 160 transitions. [2024-06-21 16:00:26,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 398 transitions, 5367 flow [2024-06-21 16:00:28,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 398 transitions, 5302 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 16:00:28,570 INFO L231 Difference]: Finished difference. Result has 297 places, 381 transitions, 4532 flow [2024-06-21 16:00:28,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4437, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4532, PETRI_PLACES=297, PETRI_TRANSITIONS=381} [2024-06-21 16:00:28,570 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 253 predicate places. [2024-06-21 16:00:28,570 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 381 transitions, 4532 flow [2024-06-21 16:00:28,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:28,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:28,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:28,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 16:00:28,571 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:28,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:28,571 INFO L85 PathProgramCache]: Analyzing trace with hash -972232312, now seen corresponding path program 7 times [2024-06-21 16:00:28,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:28,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021969660] [2024-06-21 16:00:28,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:28,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:28,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:28,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:28,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:28,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021969660] [2024-06-21 16:00:28,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021969660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:28,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:28,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:00:28,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212250455] [2024-06-21 16:00:28,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:28,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:00:28,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:28,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:00:28,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:00:28,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:00:28,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 381 transitions, 4532 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:28,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:28,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:00:28,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:29,391 INFO L124 PetriNetUnfolderBase]: 2779/4836 cut-off events. [2024-06-21 16:00:29,391 INFO L125 PetriNetUnfolderBase]: For 489045/489045 co-relation queries the response was YES. [2024-06-21 16:00:29,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34741 conditions, 4836 events. 2779/4836 cut-off events. For 489045/489045 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 32993 event pairs, 546 based on Foata normal form. 2/4816 useless extension candidates. Maximal degree in co-relation 34599. Up to 4109 conditions per place. [2024-06-21 16:00:29,450 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 339 selfloop transitions, 59 changer transitions 0/408 dead transitions. [2024-06-21 16:00:29,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 408 transitions, 5754 flow [2024-06-21 16:00:29,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:00:29,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:00:29,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-21 16:00:29,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6179401993355482 [2024-06-21 16:00:29,452 INFO L175 Difference]: Start difference. First operand has 297 places, 381 transitions, 4532 flow. Second operand 7 states and 186 transitions. [2024-06-21 16:00:29,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 408 transitions, 5754 flow [2024-06-21 16:00:31,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 408 transitions, 5672 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 16:00:31,483 INFO L231 Difference]: Finished difference. Result has 300 places, 385 transitions, 4754 flow [2024-06-21 16:00:31,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4450, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4754, PETRI_PLACES=300, PETRI_TRANSITIONS=385} [2024-06-21 16:00:31,484 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 256 predicate places. [2024-06-21 16:00:31,484 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 385 transitions, 4754 flow [2024-06-21 16:00:31,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:31,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:31,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:31,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 16:00:31,484 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:31,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:31,485 INFO L85 PathProgramCache]: Analyzing trace with hash -725097974, now seen corresponding path program 8 times [2024-06-21 16:00:31,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:31,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128571751] [2024-06-21 16:00:31,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:31,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:31,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:31,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:31,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128571751] [2024-06-21 16:00:31,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128571751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:31,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:31,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:00:31,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811895833] [2024-06-21 16:00:31,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:31,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:00:31,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:31,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:00:31,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:00:31,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:00:31,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 385 transitions, 4754 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:31,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:31,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:00:31,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:32,372 INFO L124 PetriNetUnfolderBase]: 2787/4862 cut-off events. [2024-06-21 16:00:32,373 INFO L125 PetriNetUnfolderBase]: For 501149/501149 co-relation queries the response was YES. [2024-06-21 16:00:32,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35147 conditions, 4862 events. 2787/4862 cut-off events. For 501149/501149 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 33222 event pairs, 562 based on Foata normal form. 2/4856 useless extension candidates. Maximal degree in co-relation 35004. Up to 4188 conditions per place. [2024-06-21 16:00:32,430 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 342 selfloop transitions, 53 changer transitions 0/405 dead transitions. [2024-06-21 16:00:32,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 405 transitions, 5680 flow [2024-06-21 16:00:32,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:00:32,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:00:32,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 16:00:32,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6013289036544851 [2024-06-21 16:00:32,431 INFO L175 Difference]: Start difference. First operand has 300 places, 385 transitions, 4754 flow. Second operand 7 states and 181 transitions. [2024-06-21 16:00:32,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 405 transitions, 5680 flow [2024-06-21 16:00:34,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 405 transitions, 5470 flow, removed 76 selfloop flow, removed 3 redundant places. [2024-06-21 16:00:34,602 INFO L231 Difference]: Finished difference. Result has 304 places, 387 transitions, 4751 flow [2024-06-21 16:00:34,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4578, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4751, PETRI_PLACES=304, PETRI_TRANSITIONS=387} [2024-06-21 16:00:34,602 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 260 predicate places. [2024-06-21 16:00:34,603 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 387 transitions, 4751 flow [2024-06-21 16:00:34,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:34,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:34,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:34,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 16:00:34,603 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:34,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:34,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1667121674, now seen corresponding path program 9 times [2024-06-21 16:00:34,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:34,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562757825] [2024-06-21 16:00:34,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:34,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:34,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:34,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:34,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562757825] [2024-06-21 16:00:34,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562757825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:34,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:34,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:00:34,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581852452] [2024-06-21 16:00:34,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:34,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:00:34,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:34,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:00:34,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:00:34,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:00:34,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 387 transitions, 4751 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:34,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:34,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:00:34,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:35,447 INFO L124 PetriNetUnfolderBase]: 2795/4874 cut-off events. [2024-06-21 16:00:35,447 INFO L125 PetriNetUnfolderBase]: For 506808/506808 co-relation queries the response was YES. [2024-06-21 16:00:35,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35217 conditions, 4874 events. 2795/4874 cut-off events. For 506808/506808 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 33309 event pairs, 562 based on Foata normal form. 2/4868 useless extension candidates. Maximal degree in co-relation 35072. Up to 4200 conditions per place. [2024-06-21 16:00:35,509 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 339 selfloop transitions, 55 changer transitions 0/404 dead transitions. [2024-06-21 16:00:35,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 404 transitions, 5637 flow [2024-06-21 16:00:35,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:00:35,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:00:35,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 16:00:35,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946843853820598 [2024-06-21 16:00:35,510 INFO L175 Difference]: Start difference. First operand has 304 places, 387 transitions, 4751 flow. Second operand 7 states and 179 transitions. [2024-06-21 16:00:35,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 404 transitions, 5637 flow [2024-06-21 16:00:37,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 404 transitions, 5484 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 16:00:37,597 INFO L231 Difference]: Finished difference. Result has 306 places, 389 transitions, 4779 flow [2024-06-21 16:00:37,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4598, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4779, PETRI_PLACES=306, PETRI_TRANSITIONS=389} [2024-06-21 16:00:37,598 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 262 predicate places. [2024-06-21 16:00:37,598 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 389 transitions, 4779 flow [2024-06-21 16:00:37,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:37,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:37,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:37,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 16:00:37,598 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:37,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:37,599 INFO L85 PathProgramCache]: Analyzing trace with hash 29497702, now seen corresponding path program 10 times [2024-06-21 16:00:37,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:37,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758849281] [2024-06-21 16:00:37,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:37,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:37,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:37,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:37,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758849281] [2024-06-21 16:00:37,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758849281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:37,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:37,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:00:37,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397266309] [2024-06-21 16:00:37,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:37,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:00:37,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:37,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:00:37,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:00:37,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:00:37,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 389 transitions, 4779 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:37,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:37,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:00:37,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:38,478 INFO L124 PetriNetUnfolderBase]: 2790/4854 cut-off events. [2024-06-21 16:00:38,479 INFO L125 PetriNetUnfolderBase]: For 505956/505956 co-relation queries the response was YES. [2024-06-21 16:00:38,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34940 conditions, 4854 events. 2790/4854 cut-off events. For 505956/505956 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 33060 event pairs, 587 based on Foata normal form. 2/4848 useless extension candidates. Maximal degree in co-relation 34794. Up to 4193 conditions per place. [2024-06-21 16:00:38,541 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 334 selfloop transitions, 57 changer transitions 0/401 dead transitions. [2024-06-21 16:00:38,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 401 transitions, 5589 flow [2024-06-21 16:00:38,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:00:38,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:00:38,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 16:00:38,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880398671096345 [2024-06-21 16:00:38,542 INFO L175 Difference]: Start difference. First operand has 306 places, 389 transitions, 4779 flow. Second operand 7 states and 177 transitions. [2024-06-21 16:00:38,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 401 transitions, 5589 flow [2024-06-21 16:00:40,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 401 transitions, 5390 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-21 16:00:40,741 INFO L231 Difference]: Finished difference. Result has 308 places, 389 transitions, 4699 flow [2024-06-21 16:00:40,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4580, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4699, PETRI_PLACES=308, PETRI_TRANSITIONS=389} [2024-06-21 16:00:40,742 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 264 predicate places. [2024-06-21 16:00:40,742 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 389 transitions, 4699 flow [2024-06-21 16:00:40,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:40,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:40,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:40,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 16:00:40,743 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:40,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:40,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1060253620, now seen corresponding path program 4 times [2024-06-21 16:00:40,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:40,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805377051] [2024-06-21 16:00:40,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:40,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:40,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:40,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:40,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805377051] [2024-06-21 16:00:40,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805377051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:40,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:40,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:40,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517433484] [2024-06-21 16:00:40,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:40,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:40,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:40,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:40,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:40,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:00:40,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 389 transitions, 4699 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:40,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:40,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:00:40,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:41,623 INFO L124 PetriNetUnfolderBase]: 2795/4872 cut-off events. [2024-06-21 16:00:41,623 INFO L125 PetriNetUnfolderBase]: For 508475/508475 co-relation queries the response was YES. [2024-06-21 16:00:41,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34940 conditions, 4872 events. 2795/4872 cut-off events. For 508475/508475 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 33232 event pairs, 573 based on Foata normal form. 1/4859 useless extension candidates. Maximal degree in co-relation 34793. Up to 4013 conditions per place. [2024-06-21 16:00:41,685 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 294 selfloop transitions, 117 changer transitions 0/421 dead transitions. [2024-06-21 16:00:41,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 421 transitions, 6064 flow [2024-06-21 16:00:41,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:00:41,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:00:41,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-21 16:00:41,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6424418604651163 [2024-06-21 16:00:41,687 INFO L175 Difference]: Start difference. First operand has 308 places, 389 transitions, 4699 flow. Second operand 8 states and 221 transitions. [2024-06-21 16:00:41,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 421 transitions, 6064 flow [2024-06-21 16:00:43,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 421 transitions, 5916 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 16:00:43,565 INFO L231 Difference]: Finished difference. Result has 310 places, 392 transitions, 4858 flow [2024-06-21 16:00:43,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4551, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4858, PETRI_PLACES=310, PETRI_TRANSITIONS=392} [2024-06-21 16:00:43,565 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 266 predicate places. [2024-06-21 16:00:43,565 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 392 transitions, 4858 flow [2024-06-21 16:00:43,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:43,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:43,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:43,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 16:00:43,566 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:43,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:43,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1431210994, now seen corresponding path program 5 times [2024-06-21 16:00:43,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:43,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178223592] [2024-06-21 16:00:43,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:43,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:43,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:43,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:43,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:43,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178223592] [2024-06-21 16:00:43,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178223592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:43,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:43,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:00:43,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610345937] [2024-06-21 16:00:43,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:43,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:00:43,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:43,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:00:43,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:00:43,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:00:43,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 392 transitions, 4858 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:43,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:43,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:00:43,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:44,410 INFO L124 PetriNetUnfolderBase]: 2816/4911 cut-off events. [2024-06-21 16:00:44,410 INFO L125 PetriNetUnfolderBase]: For 530387/530387 co-relation queries the response was YES. [2024-06-21 16:00:44,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35731 conditions, 4911 events. 2816/4911 cut-off events. For 530387/530387 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 33621 event pairs, 553 based on Foata normal form. 1/4904 useless extension candidates. Maximal degree in co-relation 35583. Up to 4037 conditions per place. [2024-06-21 16:00:44,473 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 287 selfloop transitions, 123 changer transitions 0/420 dead transitions. [2024-06-21 16:00:44,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 420 transitions, 6334 flow [2024-06-21 16:00:44,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:00:44,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:00:44,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-21 16:00:44,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6179401993355482 [2024-06-21 16:00:44,474 INFO L175 Difference]: Start difference. First operand has 310 places, 392 transitions, 4858 flow. Second operand 7 states and 186 transitions. [2024-06-21 16:00:44,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 420 transitions, 6334 flow [2024-06-21 16:00:47,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 420 transitions, 6036 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 16:00:47,338 INFO L231 Difference]: Finished difference. Result has 311 places, 401 transitions, 5014 flow [2024-06-21 16:00:47,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4578, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5014, PETRI_PLACES=311, PETRI_TRANSITIONS=401} [2024-06-21 16:00:47,338 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-21 16:00:47,338 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 401 transitions, 5014 flow [2024-06-21 16:00:47,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:47,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:47,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:47,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 16:00:47,339 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:47,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:47,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1143823592, now seen corresponding path program 6 times [2024-06-21 16:00:47,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:47,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180373995] [2024-06-21 16:00:47,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:47,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:47,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:47,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:47,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:47,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180373995] [2024-06-21 16:00:47,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180373995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:47,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:47,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:47,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532364227] [2024-06-21 16:00:47,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:47,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:47,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:47,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:47,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:47,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:00:47,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 401 transitions, 5014 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:47,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:47,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:00:47,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:48,263 INFO L124 PetriNetUnfolderBase]: 2829/4930 cut-off events. [2024-06-21 16:00:48,263 INFO L125 PetriNetUnfolderBase]: For 544719/544719 co-relation queries the response was YES. [2024-06-21 16:00:48,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36099 conditions, 4930 events. 2829/4930 cut-off events. For 544719/544719 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 33710 event pairs, 574 based on Foata normal form. 1/4918 useless extension candidates. Maximal degree in co-relation 35950. Up to 4052 conditions per place. [2024-06-21 16:00:48,327 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 295 selfloop transitions, 134 changer transitions 0/439 dead transitions. [2024-06-21 16:00:48,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 439 transitions, 6714 flow [2024-06-21 16:00:48,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:00:48,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:00:48,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 264 transitions. [2024-06-21 16:00:48,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6139534883720931 [2024-06-21 16:00:48,328 INFO L175 Difference]: Start difference. First operand has 311 places, 401 transitions, 5014 flow. Second operand 10 states and 264 transitions. [2024-06-21 16:00:48,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 439 transitions, 6714 flow [2024-06-21 16:00:50,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 439 transitions, 6364 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-21 16:00:50,797 INFO L231 Difference]: Finished difference. Result has 317 places, 407 transitions, 5084 flow [2024-06-21 16:00:50,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4698, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5084, PETRI_PLACES=317, PETRI_TRANSITIONS=407} [2024-06-21 16:00:50,798 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 273 predicate places. [2024-06-21 16:00:50,798 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 407 transitions, 5084 flow [2024-06-21 16:00:50,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:50,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:50,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:50,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 16:00:50,799 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:50,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:50,799 INFO L85 PathProgramCache]: Analyzing trace with hash -747214392, now seen corresponding path program 7 times [2024-06-21 16:00:50,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:50,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817257640] [2024-06-21 16:00:50,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:50,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:50,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:50,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:50,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817257640] [2024-06-21 16:00:50,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817257640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:50,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:50,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:50,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453435764] [2024-06-21 16:00:50,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:50,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:50,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:50,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:50,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:50,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:00:50,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 407 transitions, 5084 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:50,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:50,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:00:50,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:51,750 INFO L124 PetriNetUnfolderBase]: 2826/4926 cut-off events. [2024-06-21 16:00:51,750 INFO L125 PetriNetUnfolderBase]: For 548910/548910 co-relation queries the response was YES. [2024-06-21 16:00:51,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35797 conditions, 4926 events. 2826/4926 cut-off events. For 548910/548910 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 33690 event pairs, 574 based on Foata normal form. 1/4914 useless extension candidates. Maximal degree in co-relation 35648. Up to 4049 conditions per place. [2024-06-21 16:00:51,815 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 290 selfloop transitions, 133 changer transitions 0/433 dead transitions. [2024-06-21 16:00:51,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 433 transitions, 6410 flow [2024-06-21 16:00:51,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:00:51,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:00:51,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-21 16:00:51,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6308139534883721 [2024-06-21 16:00:51,816 INFO L175 Difference]: Start difference. First operand has 317 places, 407 transitions, 5084 flow. Second operand 8 states and 217 transitions. [2024-06-21 16:00:51,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 433 transitions, 6410 flow [2024-06-21 16:00:54,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 433 transitions, 6045 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-21 16:00:54,084 INFO L231 Difference]: Finished difference. Result has 317 places, 407 transitions, 4991 flow [2024-06-21 16:00:54,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4719, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4991, PETRI_PLACES=317, PETRI_TRANSITIONS=407} [2024-06-21 16:00:54,084 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 273 predicate places. [2024-06-21 16:00:54,085 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 407 transitions, 4991 flow [2024-06-21 16:00:54,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:54,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:54,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:54,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 16:00:54,085 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:54,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:54,086 INFO L85 PathProgramCache]: Analyzing trace with hash -2114009776, now seen corresponding path program 8 times [2024-06-21 16:00:54,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:54,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913948769] [2024-06-21 16:00:54,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:54,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:54,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:54,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:54,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913948769] [2024-06-21 16:00:54,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913948769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:54,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:54,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:00:54,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069802045] [2024-06-21 16:00:54,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:54,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:00:54,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:54,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:00:54,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:00:54,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:00:54,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 407 transitions, 4991 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:54,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:54,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:00:54,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:55,060 INFO L124 PetriNetUnfolderBase]: 2847/4964 cut-off events. [2024-06-21 16:00:55,061 INFO L125 PetriNetUnfolderBase]: For 569928/569928 co-relation queries the response was YES. [2024-06-21 16:00:55,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36167 conditions, 4964 events. 2847/4964 cut-off events. For 569928/569928 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 34043 event pairs, 553 based on Foata normal form. 1/4957 useless extension candidates. Maximal degree in co-relation 36018. Up to 4073 conditions per place. [2024-06-21 16:00:55,115 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 283 selfloop transitions, 140 changer transitions 0/433 dead transitions. [2024-06-21 16:00:55,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 433 transitions, 6693 flow [2024-06-21 16:00:55,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:00:55,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:00:55,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-21 16:00:55,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6179401993355482 [2024-06-21 16:00:55,117 INFO L175 Difference]: Start difference. First operand has 317 places, 407 transitions, 4991 flow. Second operand 7 states and 186 transitions. [2024-06-21 16:00:55,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 433 transitions, 6693 flow [2024-06-21 16:00:57,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 433 transitions, 6409 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 16:00:57,371 INFO L231 Difference]: Finished difference. Result has 317 places, 416 transitions, 5179 flow [2024-06-21 16:00:57,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4725, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5179, PETRI_PLACES=317, PETRI_TRANSITIONS=416} [2024-06-21 16:00:57,371 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 273 predicate places. [2024-06-21 16:00:57,372 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 416 transitions, 5179 flow [2024-06-21 16:00:57,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:57,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:57,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:57,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 16:00:57,372 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:57,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:57,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1429515496, now seen corresponding path program 9 times [2024-06-21 16:00:57,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:57,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427480467] [2024-06-21 16:00:57,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:57,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:57,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:57,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:57,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:57,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427480467] [2024-06-21 16:00:57,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427480467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:57,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:57,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:00:57,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187848964] [2024-06-21 16:00:57,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:57,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:00:57,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:57,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:00:57,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:00:57,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:00:57,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 416 transitions, 5179 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:57,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:57,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:00:57,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:58,245 INFO L124 PetriNetUnfolderBase]: 2844/4960 cut-off events. [2024-06-21 16:00:58,245 INFO L125 PetriNetUnfolderBase]: For 574310/574310 co-relation queries the response was YES. [2024-06-21 16:00:58,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36105 conditions, 4960 events. 2844/4960 cut-off events. For 574310/574310 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 34046 event pairs, 553 based on Foata normal form. 1/4953 useless extension candidates. Maximal degree in co-relation 35955. Up to 4070 conditions per place. [2024-06-21 16:00:58,312 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 282 selfloop transitions, 141 changer transitions 0/433 dead transitions. [2024-06-21 16:00:58,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 433 transitions, 6701 flow [2024-06-21 16:00:58,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:00:58,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:00:58,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-21 16:00:58,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146179401993356 [2024-06-21 16:00:58,313 INFO L175 Difference]: Start difference. First operand has 317 places, 416 transitions, 5179 flow. Second operand 7 states and 185 transitions. [2024-06-21 16:00:58,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 433 transitions, 6701 flow [2024-06-21 16:01:00,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 433 transitions, 6508 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-06-21 16:01:00,685 INFO L231 Difference]: Finished difference. Result has 322 places, 416 transitions, 5274 flow [2024-06-21 16:01:00,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4986, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5274, PETRI_PLACES=322, PETRI_TRANSITIONS=416} [2024-06-21 16:01:00,685 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 278 predicate places. [2024-06-21 16:01:00,685 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 416 transitions, 5274 flow [2024-06-21 16:01:00,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:00,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:00,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:00,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 16:01:00,686 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:00,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:00,686 INFO L85 PathProgramCache]: Analyzing trace with hash 965211660, now seen corresponding path program 10 times [2024-06-21 16:01:00,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:00,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083439687] [2024-06-21 16:01:00,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:00,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:00,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:00,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:00,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:00,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083439687] [2024-06-21 16:01:00,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083439687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:00,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:00,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:00,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492228568] [2024-06-21 16:01:00,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:00,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:00,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:00,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:00,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:00,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:01:00,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 416 transitions, 5274 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:00,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:00,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:01:00,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:01,588 INFO L124 PetriNetUnfolderBase]: 2849/4941 cut-off events. [2024-06-21 16:01:01,589 INFO L125 PetriNetUnfolderBase]: For 585469/585469 co-relation queries the response was YES. [2024-06-21 16:01:01,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36248 conditions, 4941 events. 2849/4941 cut-off events. For 585469/585469 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 33843 event pairs, 637 based on Foata normal form. 1/4930 useless extension candidates. Maximal degree in co-relation 36097. Up to 4076 conditions per place. [2024-06-21 16:01:01,649 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 278 selfloop transitions, 145 changer transitions 0/433 dead transitions. [2024-06-21 16:01:01,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 433 transitions, 6853 flow [2024-06-21 16:01:01,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:01:01,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:01:01,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 16:01:01,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6112956810631229 [2024-06-21 16:01:01,651 INFO L175 Difference]: Start difference. First operand has 322 places, 416 transitions, 5274 flow. Second operand 7 states and 184 transitions. [2024-06-21 16:01:01,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 433 transitions, 6853 flow [2024-06-21 16:01:04,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 433 transitions, 6572 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 16:01:04,309 INFO L231 Difference]: Finished difference. Result has 324 places, 419 transitions, 5348 flow [2024-06-21 16:01:04,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4999, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5348, PETRI_PLACES=324, PETRI_TRANSITIONS=419} [2024-06-21 16:01:04,310 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 280 predicate places. [2024-06-21 16:01:04,310 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 419 transitions, 5348 flow [2024-06-21 16:01:04,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:04,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:04,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:04,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 16:01:04,311 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:04,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:04,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1641936104, now seen corresponding path program 11 times [2024-06-21 16:01:04,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:04,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422628634] [2024-06-21 16:01:04,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:04,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:04,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:04,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:04,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422628634] [2024-06-21 16:01:04,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422628634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:04,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:04,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:04,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89263148] [2024-06-21 16:01:04,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:04,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:04,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:04,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:04,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:04,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:01:04,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 419 transitions, 5348 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:04,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:04,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:01:04,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:05,164 INFO L124 PetriNetUnfolderBase]: 2846/4937 cut-off events. [2024-06-21 16:01:05,164 INFO L125 PetriNetUnfolderBase]: For 589899/589899 co-relation queries the response was YES. [2024-06-21 16:01:05,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36203 conditions, 4937 events. 2846/4937 cut-off events. For 589899/589899 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 33793 event pairs, 637 based on Foata normal form. 1/4926 useless extension candidates. Maximal degree in co-relation 36051. Up to 4073 conditions per place. [2024-06-21 16:01:05,229 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 278 selfloop transitions, 144 changer transitions 0/432 dead transitions. [2024-06-21 16:01:05,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 432 transitions, 6654 flow [2024-06-21 16:01:05,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:01:05,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:01:05,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 16:01:05,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6079734219269103 [2024-06-21 16:01:05,230 INFO L175 Difference]: Start difference. First operand has 324 places, 419 transitions, 5348 flow. Second operand 7 states and 183 transitions. [2024-06-21 16:01:05,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 432 transitions, 6654 flow [2024-06-21 16:01:07,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 432 transitions, 6146 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 16:01:07,831 INFO L231 Difference]: Finished difference. Result has 325 places, 419 transitions, 5134 flow [2024-06-21 16:01:07,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4840, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5134, PETRI_PLACES=325, PETRI_TRANSITIONS=419} [2024-06-21 16:01:07,832 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 281 predicate places. [2024-06-21 16:01:07,832 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 419 transitions, 5134 flow [2024-06-21 16:01:07,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:07,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:07,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:07,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 16:01:07,833 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:07,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:07,833 INFO L85 PathProgramCache]: Analyzing trace with hash 740193778, now seen corresponding path program 4 times [2024-06-21 16:01:07,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:07,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582292984] [2024-06-21 16:01:07,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:07,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:07,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:07,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:07,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:07,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582292984] [2024-06-21 16:01:07,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582292984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:07,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:07,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:07,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612593653] [2024-06-21 16:01:07,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:07,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:07,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:07,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:07,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:07,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:01:07,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 419 transitions, 5134 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:07,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:07,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:01:07,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:08,732 INFO L124 PetriNetUnfolderBase]: 2851/4971 cut-off events. [2024-06-21 16:01:08,732 INFO L125 PetriNetUnfolderBase]: For 597212/597212 co-relation queries the response was YES. [2024-06-21 16:01:08,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36278 conditions, 4971 events. 2851/4971 cut-off events. For 597212/597212 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 34134 event pairs, 568 based on Foata normal form. 1/4961 useless extension candidates. Maximal degree in co-relation 36125. Up to 4170 conditions per place. [2024-06-21 16:01:08,799 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 335 selfloop transitions, 99 changer transitions 0/444 dead transitions. [2024-06-21 16:01:08,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 444 transitions, 6592 flow [2024-06-21 16:01:08,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:01:08,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:01:08,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-21 16:01:08,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6179401993355482 [2024-06-21 16:01:08,801 INFO L175 Difference]: Start difference. First operand has 325 places, 419 transitions, 5134 flow. Second operand 7 states and 186 transitions. [2024-06-21 16:01:08,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 444 transitions, 6592 flow [2024-06-21 16:01:11,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 444 transitions, 6227 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 16:01:11,904 INFO L231 Difference]: Finished difference. Result has 325 places, 425 transitions, 5087 flow [2024-06-21 16:01:11,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4769, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5087, PETRI_PLACES=325, PETRI_TRANSITIONS=425} [2024-06-21 16:01:11,904 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 281 predicate places. [2024-06-21 16:01:11,904 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 425 transitions, 5087 flow [2024-06-21 16:01:11,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:11,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:11,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:11,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 16:01:11,905 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:11,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:11,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1924886472, now seen corresponding path program 5 times [2024-06-21 16:01:11,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:11,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113613774] [2024-06-21 16:01:11,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:11,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:11,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:11,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:11,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:11,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113613774] [2024-06-21 16:01:11,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113613774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:11,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:11,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:11,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072084361] [2024-06-21 16:01:11,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:11,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:11,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:11,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:11,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:12,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:01:12,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 425 transitions, 5087 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:12,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:12,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:01:12,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:12,783 INFO L124 PetriNetUnfolderBase]: 2864/4993 cut-off events. [2024-06-21 16:01:12,783 INFO L125 PetriNetUnfolderBase]: For 615165/615165 co-relation queries the response was YES. [2024-06-21 16:01:12,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36790 conditions, 4993 events. 2864/4993 cut-off events. For 615165/615165 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 34285 event pairs, 568 based on Foata normal form. 1/4983 useless extension candidates. Maximal degree in co-relation 36636. Up to 4185 conditions per place. [2024-06-21 16:01:12,849 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 336 selfloop transitions, 101 changer transitions 0/447 dead transitions. [2024-06-21 16:01:12,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 447 transitions, 6559 flow [2024-06-21 16:01:12,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:01:12,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:01:12,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-21 16:01:12,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146179401993356 [2024-06-21 16:01:12,851 INFO L175 Difference]: Start difference. First operand has 325 places, 425 transitions, 5087 flow. Second operand 7 states and 185 transitions. [2024-06-21 16:01:12,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 447 transitions, 6559 flow [2024-06-21 16:01:16,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 447 transitions, 6274 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-21 16:01:16,171 INFO L231 Difference]: Finished difference. Result has 328 places, 431 transitions, 5130 flow [2024-06-21 16:01:16,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4846, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5130, PETRI_PLACES=328, PETRI_TRANSITIONS=431} [2024-06-21 16:01:16,171 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 284 predicate places. [2024-06-21 16:01:16,171 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 431 transitions, 5130 flow [2024-06-21 16:01:16,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:16,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:16,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:16,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 16:01:16,172 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:16,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:16,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1429522440, now seen corresponding path program 6 times [2024-06-21 16:01:16,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:16,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140684637] [2024-06-21 16:01:16,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:16,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:16,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:16,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:16,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140684637] [2024-06-21 16:01:16,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140684637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:16,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:16,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:16,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873815455] [2024-06-21 16:01:16,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:16,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:16,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:16,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:16,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:16,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:01:16,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 431 transitions, 5130 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:16,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:16,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:01:16,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:17,058 INFO L124 PetriNetUnfolderBase]: 2861/4989 cut-off events. [2024-06-21 16:01:17,059 INFO L125 PetriNetUnfolderBase]: For 617190/617190 co-relation queries the response was YES. [2024-06-21 16:01:17,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36367 conditions, 4989 events. 2861/4989 cut-off events. For 617190/617190 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 34248 event pairs, 568 based on Foata normal form. 1/4979 useless extension candidates. Maximal degree in co-relation 36212. Up to 4182 conditions per place. [2024-06-21 16:01:17,126 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 337 selfloop transitions, 99 changer transitions 0/446 dead transitions. [2024-06-21 16:01:17,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 446 transitions, 6260 flow [2024-06-21 16:01:17,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:01:17,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:01:17,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 16:01:17,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6112956810631229 [2024-06-21 16:01:17,127 INFO L175 Difference]: Start difference. First operand has 328 places, 431 transitions, 5130 flow. Second operand 7 states and 184 transitions. [2024-06-21 16:01:17,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 446 transitions, 6260 flow [2024-06-21 16:01:20,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 446 transitions, 6090 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 16:01:20,565 INFO L231 Difference]: Finished difference. Result has 332 places, 431 transitions, 5164 flow [2024-06-21 16:01:20,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4960, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5164, PETRI_PLACES=332, PETRI_TRANSITIONS=431} [2024-06-21 16:01:20,566 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 288 predicate places. [2024-06-21 16:01:20,566 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 431 transitions, 5164 flow [2024-06-21 16:01:20,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:20,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:20,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:20,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 16:01:20,566 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:20,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:20,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1945962780, now seen corresponding path program 7 times [2024-06-21 16:01:20,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:20,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543183863] [2024-06-21 16:01:20,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:20,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:20,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:20,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:20,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543183863] [2024-06-21 16:01:20,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543183863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:20,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:20,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:20,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681470221] [2024-06-21 16:01:20,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:20,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:20,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:20,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:20,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:20,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:01:20,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 431 transitions, 5164 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:20,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:20,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:01:20,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:21,531 INFO L124 PetriNetUnfolderBase]: 2882/5009 cut-off events. [2024-06-21 16:01:21,531 INFO L125 PetriNetUnfolderBase]: For 641767/641767 co-relation queries the response was YES. [2024-06-21 16:01:21,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36891 conditions, 5009 events. 2882/5009 cut-off events. For 641767/641767 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 34375 event pairs, 600 based on Foata normal form. 1/5002 useless extension candidates. Maximal degree in co-relation 36735. Up to 4206 conditions per place. [2024-06-21 16:01:21,593 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 334 selfloop transitions, 110 changer transitions 0/454 dead transitions. [2024-06-21 16:01:21,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 454 transitions, 6897 flow [2024-06-21 16:01:21,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:01:21,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:01:21,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-21 16:01:21,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146179401993356 [2024-06-21 16:01:21,594 INFO L175 Difference]: Start difference. First operand has 332 places, 431 transitions, 5164 flow. Second operand 7 states and 185 transitions. [2024-06-21 16:01:21,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 454 transitions, 6897 flow [2024-06-21 16:01:24,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 454 transitions, 6740 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 16:01:24,598 INFO L231 Difference]: Finished difference. Result has 334 places, 440 transitions, 5374 flow [2024-06-21 16:01:24,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5016, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5374, PETRI_PLACES=334, PETRI_TRANSITIONS=440} [2024-06-21 16:01:24,598 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 290 predicate places. [2024-06-21 16:01:24,598 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 440 transitions, 5374 flow [2024-06-21 16:01:24,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:24,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:24,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:24,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 16:01:24,599 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:24,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:24,599 INFO L85 PathProgramCache]: Analyzing trace with hash -903337846, now seen corresponding path program 8 times [2024-06-21 16:01:24,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:24,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904330185] [2024-06-21 16:01:24,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:24,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:24,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:24,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:24,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:24,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904330185] [2024-06-21 16:01:24,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904330185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:24,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:24,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:24,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085480006] [2024-06-21 16:01:24,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:24,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:24,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:24,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:24,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:24,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:01:24,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 440 transitions, 5374 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:24,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:24,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:01:24,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:25,490 INFO L124 PetriNetUnfolderBase]: 2879/5005 cut-off events. [2024-06-21 16:01:25,490 INFO L125 PetriNetUnfolderBase]: For 647039/647039 co-relation queries the response was YES. [2024-06-21 16:01:25,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36883 conditions, 5005 events. 2879/5005 cut-off events. For 647039/647039 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 34403 event pairs, 600 based on Foata normal form. 1/4998 useless extension candidates. Maximal degree in co-relation 36726. Up to 4203 conditions per place. [2024-06-21 16:01:25,557 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 333 selfloop transitions, 110 changer transitions 0/453 dead transitions. [2024-06-21 16:01:25,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 453 transitions, 6742 flow [2024-06-21 16:01:25,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:01:25,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:01:25,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 16:01:25,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6079734219269103 [2024-06-21 16:01:25,559 INFO L175 Difference]: Start difference. First operand has 334 places, 440 transitions, 5374 flow. Second operand 7 states and 183 transitions. [2024-06-21 16:01:25,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 453 transitions, 6742 flow [2024-06-21 16:01:28,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 453 transitions, 6562 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-21 16:01:28,632 INFO L231 Difference]: Finished difference. Result has 339 places, 440 transitions, 5420 flow [2024-06-21 16:01:28,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5194, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5420, PETRI_PLACES=339, PETRI_TRANSITIONS=440} [2024-06-21 16:01:28,632 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 295 predicate places. [2024-06-21 16:01:28,632 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 440 transitions, 5420 flow [2024-06-21 16:01:28,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:28,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:28,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:28,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 16:01:28,633 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:28,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:28,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1243324278, now seen corresponding path program 9 times [2024-06-21 16:01:28,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:28,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229960157] [2024-06-21 16:01:28,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:28,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:28,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:28,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:28,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:28,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229960157] [2024-06-21 16:01:28,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229960157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:28,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:28,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:28,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144824735] [2024-06-21 16:01:28,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:28,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:28,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:28,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:28,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:28,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:01:28,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 440 transitions, 5420 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:28,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:28,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:01:28,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:29,512 INFO L124 PetriNetUnfolderBase]: 2876/5001 cut-off events. [2024-06-21 16:01:29,513 INFO L125 PetriNetUnfolderBase]: For 652273/652273 co-relation queries the response was YES. [2024-06-21 16:01:29,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36828 conditions, 5001 events. 2876/5001 cut-off events. For 652273/652273 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 34385 event pairs, 600 based on Foata normal form. 1/4994 useless extension candidates. Maximal degree in co-relation 36669. Up to 4200 conditions per place. [2024-06-21 16:01:29,579 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 328 selfloop transitions, 114 changer transitions 0/452 dead transitions. [2024-06-21 16:01:29,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 452 transitions, 6560 flow [2024-06-21 16:01:29,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:01:29,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:01:29,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 16:01:29,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-21 16:01:29,581 INFO L175 Difference]: Start difference. First operand has 339 places, 440 transitions, 5420 flow. Second operand 7 states and 182 transitions. [2024-06-21 16:01:29,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 452 transitions, 6560 flow [2024-06-21 16:01:32,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 452 transitions, 6325 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 16:01:33,003 INFO L231 Difference]: Finished difference. Result has 341 places, 440 transitions, 5419 flow [2024-06-21 16:01:33,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5185, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5419, PETRI_PLACES=341, PETRI_TRANSITIONS=440} [2024-06-21 16:01:33,004 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 297 predicate places. [2024-06-21 16:01:33,004 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 440 transitions, 5419 flow [2024-06-21 16:01:33,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:33,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:33,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:33,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 16:01:33,004 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:33,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:33,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1055031562, now seen corresponding path program 1 times [2024-06-21 16:01:33,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:33,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543153770] [2024-06-21 16:01:33,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:33,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:33,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:33,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:33,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:33,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543153770] [2024-06-21 16:01:33,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543153770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:33,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:33,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:01:33,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922793342] [2024-06-21 16:01:33,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:33,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:01:33,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:33,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:01:33,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:01:33,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:01:33,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 440 transitions, 5419 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:33,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:33,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:01:33,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:33,989 INFO L124 PetriNetUnfolderBase]: 2897/5046 cut-off events. [2024-06-21 16:01:33,989 INFO L125 PetriNetUnfolderBase]: For 688251/688251 co-relation queries the response was YES. [2024-06-21 16:01:34,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37660 conditions, 5046 events. 2897/5046 cut-off events. For 688251/688251 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 34665 event pairs, 553 based on Foata normal form. 2/5037 useless extension candidates. Maximal degree in co-relation 37500. Up to 4310 conditions per place. [2024-06-21 16:01:34,058 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 397 selfloop transitions, 68 changer transitions 0/475 dead transitions. [2024-06-21 16:01:34,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 475 transitions, 6835 flow [2024-06-21 16:01:34,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:01:34,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:01:34,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-21 16:01:34,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6098191214470284 [2024-06-21 16:01:34,059 INFO L175 Difference]: Start difference. First operand has 341 places, 440 transitions, 5419 flow. Second operand 9 states and 236 transitions. [2024-06-21 16:01:34,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 475 transitions, 6835 flow [2024-06-21 16:01:37,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 475 transitions, 6622 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 16:01:37,480 INFO L231 Difference]: Finished difference. Result has 344 places, 444 transitions, 5531 flow [2024-06-21 16:01:37,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5206, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5531, PETRI_PLACES=344, PETRI_TRANSITIONS=444} [2024-06-21 16:01:37,480 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 300 predicate places. [2024-06-21 16:01:37,481 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 444 transitions, 5531 flow [2024-06-21 16:01:37,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:37,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:37,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:37,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 16:01:37,481 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:37,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:37,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1435967130, now seen corresponding path program 2 times [2024-06-21 16:01:37,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:37,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996210832] [2024-06-21 16:01:37,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:37,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:37,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:37,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:37,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996210832] [2024-06-21 16:01:37,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996210832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:37,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:37,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:01:37,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496805873] [2024-06-21 16:01:37,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:37,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:01:37,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:37,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:01:37,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:01:37,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:01:37,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 444 transitions, 5531 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:37,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:37,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:01:37,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:38,496 INFO L124 PetriNetUnfolderBase]: 2892/5048 cut-off events. [2024-06-21 16:01:38,496 INFO L125 PetriNetUnfolderBase]: For 685251/685251 co-relation queries the response was YES. [2024-06-21 16:01:38,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37452 conditions, 5048 events. 2892/5048 cut-off events. For 685251/685251 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 34742 event pairs, 563 based on Foata normal form. 2/5041 useless extension candidates. Maximal degree in co-relation 37290. Up to 4338 conditions per place. [2024-06-21 16:01:38,567 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 396 selfloop transitions, 63 changer transitions 0/469 dead transitions. [2024-06-21 16:01:38,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 469 transitions, 6511 flow [2024-06-21 16:01:38,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:01:38,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:01:38,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-21 16:01:38,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6104651162790697 [2024-06-21 16:01:38,568 INFO L175 Difference]: Start difference. First operand has 344 places, 444 transitions, 5531 flow. Second operand 8 states and 210 transitions. [2024-06-21 16:01:38,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 469 transitions, 6511 flow [2024-06-21 16:01:42,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 469 transitions, 6265 flow, removed 84 selfloop flow, removed 5 redundant places. [2024-06-21 16:01:42,239 INFO L231 Difference]: Finished difference. Result has 347 places, 444 transitions, 5416 flow [2024-06-21 16:01:42,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5285, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5416, PETRI_PLACES=347, PETRI_TRANSITIONS=444} [2024-06-21 16:01:42,239 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 303 predicate places. [2024-06-21 16:01:42,239 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 444 transitions, 5416 flow [2024-06-21 16:01:42,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:42,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:42,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:42,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 16:01:42,240 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:42,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:42,240 INFO L85 PathProgramCache]: Analyzing trace with hash 460813394, now seen corresponding path program 1 times [2024-06-21 16:01:42,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:42,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019065496] [2024-06-21 16:01:42,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:42,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:42,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:42,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:42,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019065496] [2024-06-21 16:01:42,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019065496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:42,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:42,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:01:42,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694107920] [2024-06-21 16:01:42,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:42,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:01:42,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:42,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:01:42,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:01:42,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:01:42,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 444 transitions, 5416 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:42,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:42,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:01:42,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:43,223 INFO L124 PetriNetUnfolderBase]: 2905/5064 cut-off events. [2024-06-21 16:01:43,223 INFO L125 PetriNetUnfolderBase]: For 696326/696326 co-relation queries the response was YES. [2024-06-21 16:01:43,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37635 conditions, 5064 events. 2905/5064 cut-off events. For 696326/696326 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 34844 event pairs, 583 based on Foata normal form. 1/5050 useless extension candidates. Maximal degree in co-relation 37471. Up to 4226 conditions per place. [2024-06-21 16:01:43,292 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 347 selfloop transitions, 120 changer transitions 0/477 dead transitions. [2024-06-21 16:01:43,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 477 transitions, 7208 flow [2024-06-21 16:01:43,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:01:43,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:01:43,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-21 16:01:43,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6308139534883721 [2024-06-21 16:01:43,293 INFO L175 Difference]: Start difference. First operand has 347 places, 444 transitions, 5416 flow. Second operand 8 states and 217 transitions. [2024-06-21 16:01:43,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 477 transitions, 7208 flow [2024-06-21 16:01:46,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 477 transitions, 7079 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 16:01:46,301 INFO L231 Difference]: Finished difference. Result has 349 places, 450 transitions, 5623 flow [2024-06-21 16:01:46,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5287, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5623, PETRI_PLACES=349, PETRI_TRANSITIONS=450} [2024-06-21 16:01:46,301 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 305 predicate places. [2024-06-21 16:01:46,301 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 450 transitions, 5623 flow [2024-06-21 16:01:46,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:46,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:46,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:46,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 16:01:46,302 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:46,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:46,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1105869874, now seen corresponding path program 10 times [2024-06-21 16:01:46,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:46,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431877601] [2024-06-21 16:01:46,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:46,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:46,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:46,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:46,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431877601] [2024-06-21 16:01:46,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431877601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:46,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:46,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:46,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501249705] [2024-06-21 16:01:46,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:46,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:46,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:46,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:46,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:46,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:01:46,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 450 transitions, 5623 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:46,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:46,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:01:46,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:47,267 INFO L124 PetriNetUnfolderBase]: 2910/5085 cut-off events. [2024-06-21 16:01:47,267 INFO L125 PetriNetUnfolderBase]: For 708011/708011 co-relation queries the response was YES. [2024-06-21 16:01:47,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37940 conditions, 5085 events. 2910/5085 cut-off events. For 708011/708011 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 35042 event pairs, 547 based on Foata normal form. 1/5079 useless extension candidates. Maximal degree in co-relation 37775. Up to 4424 conditions per place. [2024-06-21 16:01:47,337 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 429 selfloop transitions, 41 changer transitions 0/480 dead transitions. [2024-06-21 16:01:47,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 480 transitions, 6925 flow [2024-06-21 16:01:47,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:01:47,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:01:47,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-21 16:01:47,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6445182724252492 [2024-06-21 16:01:47,339 INFO L175 Difference]: Start difference. First operand has 349 places, 450 transitions, 5623 flow. Second operand 7 states and 194 transitions. [2024-06-21 16:01:47,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 480 transitions, 6925 flow [2024-06-21 16:01:51,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 480 transitions, 6716 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 16:01:51,217 INFO L231 Difference]: Finished difference. Result has 352 places, 453 transitions, 5560 flow [2024-06-21 16:01:51,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5414, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5560, PETRI_PLACES=352, PETRI_TRANSITIONS=453} [2024-06-21 16:01:51,232 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 308 predicate places. [2024-06-21 16:01:51,232 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 453 transitions, 5560 flow [2024-06-21 16:01:51,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:51,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:51,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:51,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 16:01:51,233 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:51,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:51,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1114440754, now seen corresponding path program 11 times [2024-06-21 16:01:51,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:51,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733167203] [2024-06-21 16:01:51,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:51,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:51,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:51,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:51,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733167203] [2024-06-21 16:01:51,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733167203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:51,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:51,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:51,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907703437] [2024-06-21 16:01:51,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:51,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:51,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:51,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:51,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:51,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:01:51,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 453 transitions, 5560 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:51,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:51,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:01:51,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:52,217 INFO L124 PetriNetUnfolderBase]: 2920/5103 cut-off events. [2024-06-21 16:01:52,217 INFO L125 PetriNetUnfolderBase]: For 719116/719116 co-relation queries the response was YES. [2024-06-21 16:01:52,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37934 conditions, 5103 events. 2920/5103 cut-off events. For 719116/719116 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 35234 event pairs, 547 based on Foata normal form. 1/5097 useless extension candidates. Maximal degree in co-relation 37768. Up to 4434 conditions per place. [2024-06-21 16:01:52,289 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 430 selfloop transitions, 48 changer transitions 0/488 dead transitions. [2024-06-21 16:01:52,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 488 transitions, 6930 flow [2024-06-21 16:01:52,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:01:52,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:01:52,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-21 16:01:52,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6098191214470284 [2024-06-21 16:01:52,290 INFO L175 Difference]: Start difference. First operand has 352 places, 453 transitions, 5560 flow. Second operand 9 states and 236 transitions. [2024-06-21 16:01:52,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 488 transitions, 6930 flow [2024-06-21 16:01:56,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 488 transitions, 6692 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 16:01:56,220 INFO L231 Difference]: Finished difference. Result has 356 places, 459 transitions, 5528 flow [2024-06-21 16:01:56,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5343, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5528, PETRI_PLACES=356, PETRI_TRANSITIONS=459} [2024-06-21 16:01:56,221 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 312 predicate places. [2024-06-21 16:01:56,221 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 459 transitions, 5528 flow [2024-06-21 16:01:56,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:56,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:56,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:56,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 16:01:56,222 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:56,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:56,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1990794902, now seen corresponding path program 3 times [2024-06-21 16:01:56,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:56,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209703590] [2024-06-21 16:01:56,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:56,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:56,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:56,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:56,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209703590] [2024-06-21 16:01:56,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209703590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:56,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:56,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:56,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769353134] [2024-06-21 16:01:56,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:56,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:56,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:56,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:56,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:56,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:01:56,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 459 transitions, 5528 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:56,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:56,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:01:56,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:57,227 INFO L124 PetriNetUnfolderBase]: 2947/5152 cut-off events. [2024-06-21 16:01:57,228 INFO L125 PetriNetUnfolderBase]: For 722476/722476 co-relation queries the response was YES. [2024-06-21 16:01:57,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37369 conditions, 5152 events. 2947/5152 cut-off events. For 722476/722476 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 35490 event pairs, 459 based on Foata normal form. 6/5151 useless extension candidates. Maximal degree in co-relation 37203. Up to 4375 conditions per place. [2024-06-21 16:01:57,298 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 444 selfloop transitions, 40 changer transitions 0/494 dead transitions. [2024-06-21 16:01:57,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 494 transitions, 6624 flow [2024-06-21 16:01:57,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:01:57,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:01:57,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-21 16:01:57,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6511627906976745 [2024-06-21 16:01:57,299 INFO L175 Difference]: Start difference. First operand has 356 places, 459 transitions, 5528 flow. Second operand 7 states and 196 transitions. [2024-06-21 16:01:57,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 494 transitions, 6624 flow [2024-06-21 16:02:00,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 494 transitions, 6497 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 16:02:00,964 INFO L231 Difference]: Finished difference. Result has 357 places, 461 transitions, 5519 flow [2024-06-21 16:02:00,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5401, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5519, PETRI_PLACES=357, PETRI_TRANSITIONS=461} [2024-06-21 16:02:00,964 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 313 predicate places. [2024-06-21 16:02:00,965 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 461 transitions, 5519 flow [2024-06-21 16:02:00,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:00,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:00,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:00,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 16:02:00,967 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:00,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:00,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1426648600, now seen corresponding path program 12 times [2024-06-21 16:02:00,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:00,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901218756] [2024-06-21 16:02:00,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:00,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:00,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:01,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:01,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901218756] [2024-06-21 16:02:01,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901218756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:01,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:01,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:01,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268175614] [2024-06-21 16:02:01,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:01,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:01,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:01,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:01,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:01,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:02:01,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 461 transitions, 5519 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:01,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:01,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:02:01,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:01,981 INFO L124 PetriNetUnfolderBase]: 2952/5154 cut-off events. [2024-06-21 16:02:01,982 INFO L125 PetriNetUnfolderBase]: For 698463/698463 co-relation queries the response was YES. [2024-06-21 16:02:02,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37600 conditions, 5154 events. 2952/5154 cut-off events. For 698463/698463 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 35704 event pairs, 555 based on Foata normal form. 1/5147 useless extension candidates. Maximal degree in co-relation 37432. Up to 4229 conditions per place. [2024-06-21 16:02:02,054 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 344 selfloop transitions, 140 changer transitions 0/494 dead transitions. [2024-06-21 16:02:02,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 494 transitions, 7583 flow [2024-06-21 16:02:02,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:02:02,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:02:02,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 261 transitions. [2024-06-21 16:02:02,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6069767441860465 [2024-06-21 16:02:02,056 INFO L175 Difference]: Start difference. First operand has 357 places, 461 transitions, 5519 flow. Second operand 10 states and 261 transitions. [2024-06-21 16:02:02,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 494 transitions, 7583 flow [2024-06-21 16:02:04,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 494 transitions, 7476 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 16:02:04,750 INFO L231 Difference]: Finished difference. Result has 362 places, 464 transitions, 5754 flow [2024-06-21 16:02:04,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5412, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5754, PETRI_PLACES=362, PETRI_TRANSITIONS=464} [2024-06-21 16:02:04,750 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-21 16:02:04,750 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 464 transitions, 5754 flow [2024-06-21 16:02:04,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:04,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:04,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:04,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 16:02:04,753 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:04,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:04,753 INFO L85 PathProgramCache]: Analyzing trace with hash 110981754, now seen corresponding path program 13 times [2024-06-21 16:02:04,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:04,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283669614] [2024-06-21 16:02:04,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:04,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:04,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:04,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:04,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283669614] [2024-06-21 16:02:04,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283669614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:04,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:04,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:04,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561831248] [2024-06-21 16:02:04,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:04,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:04,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:04,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:04,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:04,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:02:04,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 464 transitions, 5754 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:04,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:04,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:02:04,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:05,738 INFO L124 PetriNetUnfolderBase]: 2949/5150 cut-off events. [2024-06-21 16:02:05,738 INFO L125 PetriNetUnfolderBase]: For 701845/701845 co-relation queries the response was YES. [2024-06-21 16:02:05,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37708 conditions, 5150 events. 2949/5150 cut-off events. For 701845/701845 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 35675 event pairs, 555 based on Foata normal form. 1/5143 useless extension candidates. Maximal degree in co-relation 37539. Up to 4226 conditions per place. [2024-06-21 16:02:05,811 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 339 selfloop transitions, 139 changer transitions 0/488 dead transitions. [2024-06-21 16:02:05,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 488 transitions, 7500 flow [2024-06-21 16:02:05,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:02:05,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:02:05,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-21 16:02:05,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.622093023255814 [2024-06-21 16:02:05,812 INFO L175 Difference]: Start difference. First operand has 362 places, 464 transitions, 5754 flow. Second operand 8 states and 214 transitions. [2024-06-21 16:02:05,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 488 transitions, 7500 flow [2024-06-21 16:02:08,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 488 transitions, 6988 flow, removed 38 selfloop flow, removed 10 redundant places. [2024-06-21 16:02:08,681 INFO L231 Difference]: Finished difference. Result has 360 places, 464 transitions, 5526 flow [2024-06-21 16:02:08,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5242, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5526, PETRI_PLACES=360, PETRI_TRANSITIONS=464} [2024-06-21 16:02:08,682 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 316 predicate places. [2024-06-21 16:02:08,682 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 464 transitions, 5526 flow [2024-06-21 16:02:08,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:08,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:08,682 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] [2024-06-21 16:02:08,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 16:02:08,683 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:08,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:08,683 INFO L85 PathProgramCache]: Analyzing trace with hash 97155526, now seen corresponding path program 14 times [2024-06-21 16:02:08,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:08,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679081903] [2024-06-21 16:02:08,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:08,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:08,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:08,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:08,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:08,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679081903] [2024-06-21 16:02:08,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679081903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:08,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:08,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:08,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374977608] [2024-06-21 16:02:08,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:08,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:08,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:08,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:08,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:08,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:02:08,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 464 transitions, 5526 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:08,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:08,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:02:08,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:09,655 INFO L124 PetriNetUnfolderBase]: 2946/5146 cut-off events. [2024-06-21 16:02:09,655 INFO L125 PetriNetUnfolderBase]: For 703108/703108 co-relation queries the response was YES. [2024-06-21 16:02:09,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37386 conditions, 5146 events. 2946/5146 cut-off events. For 703108/703108 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 35646 event pairs, 555 based on Foata normal form. 1/5139 useless extension candidates. Maximal degree in co-relation 37219. Up to 4223 conditions per place. [2024-06-21 16:02:09,726 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 338 selfloop transitions, 142 changer transitions 0/490 dead transitions. [2024-06-21 16:02:09,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 490 transitions, 7042 flow [2024-06-21 16:02:09,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:02:09,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:02:09,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-21 16:02:09,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 16:02:09,728 INFO L175 Difference]: Start difference. First operand has 360 places, 464 transitions, 5526 flow. Second operand 8 states and 215 transitions. [2024-06-21 16:02:09,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 490 transitions, 7042 flow [2024-06-21 16:02:12,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 490 transitions, 6742 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 16:02:12,681 INFO L231 Difference]: Finished difference. Result has 361 places, 464 transitions, 5516 flow [2024-06-21 16:02:12,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5226, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5516, PETRI_PLACES=361, PETRI_TRANSITIONS=464} [2024-06-21 16:02:12,681 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 317 predicate places. [2024-06-21 16:02:12,681 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 464 transitions, 5516 flow [2024-06-21 16:02:12,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:12,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:12,682 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] [2024-06-21 16:02:12,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 16:02:12,682 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:12,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:12,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1971386822, now seen corresponding path program 15 times [2024-06-21 16:02:12,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:12,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987477050] [2024-06-21 16:02:12,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:12,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:12,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:12,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:12,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987477050] [2024-06-21 16:02:12,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987477050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:12,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:12,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:02:12,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162387753] [2024-06-21 16:02:12,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:12,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:02:12,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:12,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:02:12,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:02:12,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:02:12,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 464 transitions, 5516 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:12,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:12,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:02:12,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:13,630 INFO L124 PetriNetUnfolderBase]: 2943/5155 cut-off events. [2024-06-21 16:02:13,630 INFO L125 PetriNetUnfolderBase]: For 704887/704887 co-relation queries the response was YES. [2024-06-21 16:02:13,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37333 conditions, 5155 events. 2943/5155 cut-off events. For 704887/704887 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 35703 event pairs, 544 based on Foata normal form. 1/5155 useless extension candidates. Maximal degree in co-relation 37165. Up to 4516 conditions per place. [2024-06-21 16:02:13,820 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 453 selfloop transitions, 26 changer transitions 0/489 dead transitions. [2024-06-21 16:02:13,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 489 transitions, 6784 flow [2024-06-21 16:02:13,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:02:13,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:02:13,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 16:02:13,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959302325581395 [2024-06-21 16:02:13,822 INFO L175 Difference]: Start difference. First operand has 361 places, 464 transitions, 5516 flow. Second operand 8 states and 205 transitions. [2024-06-21 16:02:13,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 489 transitions, 6784 flow [2024-06-21 16:02:17,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 489 transitions, 6480 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 16:02:17,727 INFO L231 Difference]: Finished difference. Result has 362 places, 464 transitions, 5270 flow [2024-06-21 16:02:17,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5212, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5270, PETRI_PLACES=362, PETRI_TRANSITIONS=464} [2024-06-21 16:02:17,728 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-21 16:02:17,728 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 464 transitions, 5270 flow [2024-06-21 16:02:17,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:17,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:17,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:17,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 16:02:17,728 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:17,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:17,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1982814662, now seen corresponding path program 16 times [2024-06-21 16:02:17,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:17,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499638809] [2024-06-21 16:02:17,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:17,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:17,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:17,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:17,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499638809] [2024-06-21 16:02:17,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499638809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:17,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:17,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:02:17,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178155318] [2024-06-21 16:02:17,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:17,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:02:17,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:17,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:02:17,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:02:17,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:02:17,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 464 transitions, 5270 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:17,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:17,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:02:17,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:18,706 INFO L124 PetriNetUnfolderBase]: 2940/5151 cut-off events. [2024-06-21 16:02:18,706 INFO L125 PetriNetUnfolderBase]: For 706942/706942 co-relation queries the response was YES. [2024-06-21 16:02:18,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36903 conditions, 5151 events. 2940/5151 cut-off events. For 706942/706942 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 35697 event pairs, 544 based on Foata normal form. 1/5151 useless extension candidates. Maximal degree in co-relation 36734. Up to 4513 conditions per place. [2024-06-21 16:02:18,779 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 448 selfloop transitions, 27 changer transitions 0/485 dead transitions. [2024-06-21 16:02:18,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 485 transitions, 6272 flow [2024-06-21 16:02:18,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:02:18,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:02:18,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 16:02:18,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5872093023255814 [2024-06-21 16:02:18,781 INFO L175 Difference]: Start difference. First operand has 362 places, 464 transitions, 5270 flow. Second operand 8 states and 202 transitions. [2024-06-21 16:02:18,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 485 transitions, 6272 flow [2024-06-21 16:02:23,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 485 transitions, 6192 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 16:02:23,158 INFO L231 Difference]: Finished difference. Result has 364 places, 464 transitions, 5250 flow [2024-06-21 16:02:23,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5190, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5250, PETRI_PLACES=364, PETRI_TRANSITIONS=464} [2024-06-21 16:02:23,159 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 320 predicate places. [2024-06-21 16:02:23,159 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 464 transitions, 5250 flow [2024-06-21 16:02:23,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:23,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:23,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:23,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 16:02:23,160 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:23,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:23,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1301508550, now seen corresponding path program 17 times [2024-06-21 16:02:23,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:23,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296996164] [2024-06-21 16:02:23,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:23,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:23,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:23,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:23,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296996164] [2024-06-21 16:02:23,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296996164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:23,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:23,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:23,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406379149] [2024-06-21 16:02:23,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:23,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:23,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:23,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:23,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:23,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:02:23,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 464 transitions, 5250 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:23,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:23,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:02:23,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:24,119 INFO L124 PetriNetUnfolderBase]: 2945/5147 cut-off events. [2024-06-21 16:02:24,119 INFO L125 PetriNetUnfolderBase]: For 717999/717999 co-relation queries the response was YES. [2024-06-21 16:02:24,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37021 conditions, 5147 events. 2945/5147 cut-off events. For 717999/717999 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 35658 event pairs, 561 based on Foata normal form. 1/5140 useless extension candidates. Maximal degree in co-relation 36851. Up to 4223 conditions per place. [2024-06-21 16:02:24,191 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 324 selfloop transitions, 149 changer transitions 0/483 dead transitions. [2024-06-21 16:02:24,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 483 transitions, 6533 flow [2024-06-21 16:02:24,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:02:24,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:02:24,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 16:02:24,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959302325581395 [2024-06-21 16:02:24,193 INFO L175 Difference]: Start difference. First operand has 364 places, 464 transitions, 5250 flow. Second operand 8 states and 205 transitions. [2024-06-21 16:02:24,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 483 transitions, 6533 flow [2024-06-21 16:02:28,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 483 transitions, 6442 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 16:02:28,464 INFO L231 Difference]: Finished difference. Result has 363 places, 467 transitions, 5510 flow [2024-06-21 16:02:28,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5159, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5510, PETRI_PLACES=363, PETRI_TRANSITIONS=467} [2024-06-21 16:02:28,464 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 319 predicate places. [2024-06-21 16:02:28,465 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 467 transitions, 5510 flow [2024-06-21 16:02:28,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:28,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:28,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:28,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 16:02:28,465 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:28,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:28,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1648168166, now seen corresponding path program 12 times [2024-06-21 16:02:28,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:28,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384495418] [2024-06-21 16:02:28,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:28,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:28,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:28,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:28,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384495418] [2024-06-21 16:02:28,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384495418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:28,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:28,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:02:28,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232741336] [2024-06-21 16:02:28,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:28,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:02:28,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:28,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:02:28,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:02:28,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:02:28,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 467 transitions, 5510 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:28,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:28,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:02:28,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:29,460 INFO L124 PetriNetUnfolderBase]: 2958/5166 cut-off events. [2024-06-21 16:02:29,460 INFO L125 PetriNetUnfolderBase]: For 738081/738081 co-relation queries the response was YES. [2024-06-21 16:02:29,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37678 conditions, 5166 events. 2958/5166 cut-off events. For 738081/738081 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 35834 event pairs, 569 based on Foata normal form. 1/5156 useless extension candidates. Maximal degree in co-relation 37507. Up to 4316 conditions per place. [2024-06-21 16:02:29,530 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 359 selfloop transitions, 126 changer transitions 0/495 dead transitions. [2024-06-21 16:02:29,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 495 transitions, 7142 flow [2024-06-21 16:02:29,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:02:29,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:02:29,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-21 16:02:29,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6345514950166113 [2024-06-21 16:02:29,531 INFO L175 Difference]: Start difference. First operand has 363 places, 467 transitions, 5510 flow. Second operand 7 states and 191 transitions. [2024-06-21 16:02:29,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 495 transitions, 7142 flow [2024-06-21 16:02:32,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 495 transitions, 6899 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 16:02:32,973 INFO L231 Difference]: Finished difference. Result has 365 places, 473 transitions, 5625 flow [2024-06-21 16:02:32,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5267, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5625, PETRI_PLACES=365, PETRI_TRANSITIONS=473} [2024-06-21 16:02:32,974 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 321 predicate places. [2024-06-21 16:02:32,974 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 473 transitions, 5625 flow [2024-06-21 16:02:32,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:32,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:32,974 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] [2024-06-21 16:02:32,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 16:02:32,974 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:32,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:32,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1360791608, now seen corresponding path program 13 times [2024-06-21 16:02:32,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:32,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910056743] [2024-06-21 16:02:32,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:32,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:32,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:33,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:33,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910056743] [2024-06-21 16:02:33,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910056743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:33,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:33,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:02:33,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880386772] [2024-06-21 16:02:33,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:33,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:02:33,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:33,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:02:33,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:02:33,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:02:33,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 473 transitions, 5625 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:33,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:33,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:02:33,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:33,906 INFO L124 PetriNetUnfolderBase]: 2963/5175 cut-off events. [2024-06-21 16:02:33,906 INFO L125 PetriNetUnfolderBase]: For 751313/751313 co-relation queries the response was YES. [2024-06-21 16:02:33,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37749 conditions, 5175 events. 2963/5175 cut-off events. For 751313/751313 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 35945 event pairs, 569 based on Foata normal form. 1/5165 useless extension candidates. Maximal degree in co-relation 37577. Up to 4322 conditions per place. [2024-06-21 16:02:33,979 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 359 selfloop transitions, 126 changer transitions 0/495 dead transitions. [2024-06-21 16:02:33,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 495 transitions, 7209 flow [2024-06-21 16:02:33,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:02:33,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:02:33,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-21 16:02:33,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6245847176079734 [2024-06-21 16:02:33,980 INFO L175 Difference]: Start difference. First operand has 365 places, 473 transitions, 5625 flow. Second operand 7 states and 188 transitions. [2024-06-21 16:02:33,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 495 transitions, 7209 flow [2024-06-21 16:02:37,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 495 transitions, 7033 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 16:02:37,675 INFO L231 Difference]: Finished difference. Result has 369 places, 476 transitions, 5763 flow [2024-06-21 16:02:37,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5452, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5763, PETRI_PLACES=369, PETRI_TRANSITIONS=476} [2024-06-21 16:02:37,675 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 325 predicate places. [2024-06-21 16:02:37,675 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 476 transitions, 5763 flow [2024-06-21 16:02:37,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:37,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:37,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:37,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 16:02:37,676 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:37,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:37,676 INFO L85 PathProgramCache]: Analyzing trace with hash -875496218, now seen corresponding path program 14 times [2024-06-21 16:02:37,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:37,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912764696] [2024-06-21 16:02:37,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:37,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:37,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:37,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:37,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912764696] [2024-06-21 16:02:37,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912764696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:37,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:37,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:37,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816538012] [2024-06-21 16:02:37,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:37,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:37,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:37,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:37,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:37,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:02:37,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 476 transitions, 5763 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:37,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:37,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:02:37,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:38,646 INFO L124 PetriNetUnfolderBase]: 2968/5184 cut-off events. [2024-06-21 16:02:38,646 INFO L125 PetriNetUnfolderBase]: For 763915/763915 co-relation queries the response was YES. [2024-06-21 16:02:38,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37922 conditions, 5184 events. 2968/5184 cut-off events. For 763915/763915 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 35979 event pairs, 569 based on Foata normal form. 1/5174 useless extension candidates. Maximal degree in co-relation 37749. Up to 4328 conditions per place. [2024-06-21 16:02:38,720 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 354 selfloop transitions, 131 changer transitions 0/495 dead transitions. [2024-06-21 16:02:38,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 495 transitions, 7088 flow [2024-06-21 16:02:38,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:02:38,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:02:38,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 16:02:38,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959302325581395 [2024-06-21 16:02:38,721 INFO L175 Difference]: Start difference. First operand has 369 places, 476 transitions, 5763 flow. Second operand 8 states and 205 transitions. [2024-06-21 16:02:38,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 495 transitions, 7088 flow [2024-06-21 16:02:42,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 495 transitions, 6922 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 16:02:42,176 INFO L231 Difference]: Finished difference. Result has 374 places, 479 transitions, 5924 flow [2024-06-21 16:02:42,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5600, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5924, PETRI_PLACES=374, PETRI_TRANSITIONS=479} [2024-06-21 16:02:42,176 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 330 predicate places. [2024-06-21 16:02:42,177 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 479 transitions, 5924 flow [2024-06-21 16:02:42,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:42,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:42,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:42,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 16:02:42,177 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:42,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:42,177 INFO L85 PathProgramCache]: Analyzing trace with hash -329168406, now seen corresponding path program 18 times [2024-06-21 16:02:42,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:42,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671785292] [2024-06-21 16:02:42,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:42,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:42,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:42,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:42,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:42,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671785292] [2024-06-21 16:02:42,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671785292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:42,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:42,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:42,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463406619] [2024-06-21 16:02:42,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:42,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:42,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:42,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:42,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:42,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:02:42,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 479 transitions, 5924 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:42,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:42,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:02:42,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:43,152 INFO L124 PetriNetUnfolderBase]: 2965/5156 cut-off events. [2024-06-21 16:02:43,153 INFO L125 PetriNetUnfolderBase]: For 768995/768995 co-relation queries the response was YES. [2024-06-21 16:02:43,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37871 conditions, 5156 events. 2965/5156 cut-off events. For 768995/768995 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 35761 event pairs, 638 based on Foata normal form. 1/5145 useless extension candidates. Maximal degree in co-relation 37697. Up to 4252 conditions per place. [2024-06-21 16:02:43,232 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 330 selfloop transitions, 151 changer transitions 0/491 dead transitions. [2024-06-21 16:02:43,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 491 transitions, 6914 flow [2024-06-21 16:02:43,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:02:43,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:02:43,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 16:02:43,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5872093023255814 [2024-06-21 16:02:43,233 INFO L175 Difference]: Start difference. First operand has 374 places, 479 transitions, 5924 flow. Second operand 8 states and 202 transitions. [2024-06-21 16:02:43,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 491 transitions, 6914 flow [2024-06-21 16:02:47,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 491 transitions, 6517 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 16:02:47,732 INFO L231 Difference]: Finished difference. Result has 375 places, 479 transitions, 5835 flow [2024-06-21 16:02:47,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5527, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5835, PETRI_PLACES=375, PETRI_TRANSITIONS=479} [2024-06-21 16:02:47,733 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 331 predicate places. [2024-06-21 16:02:47,733 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 479 transitions, 5835 flow [2024-06-21 16:02:47,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:47,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:47,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:47,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 16:02:47,733 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:47,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:47,734 INFO L85 PathProgramCache]: Analyzing trace with hash 152227152, now seen corresponding path program 15 times [2024-06-21 16:02:47,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:47,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203722890] [2024-06-21 16:02:47,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:47,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:47,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:47,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:47,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203722890] [2024-06-21 16:02:47,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203722890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:47,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:47,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:02:47,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868686364] [2024-06-21 16:02:47,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:47,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:02:47,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:47,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:02:47,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:02:47,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:02:47,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 479 transitions, 5835 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:47,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:47,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:02:47,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:48,773 INFO L124 PetriNetUnfolderBase]: 2970/5188 cut-off events. [2024-06-21 16:02:48,773 INFO L125 PetriNetUnfolderBase]: For 777591/777591 co-relation queries the response was YES. [2024-06-21 16:02:48,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38014 conditions, 5188 events. 2970/5188 cut-off events. For 777591/777591 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 35982 event pairs, 576 based on Foata normal form. 1/5173 useless extension candidates. Maximal degree in co-relation 37839. Up to 4330 conditions per place. [2024-06-21 16:02:48,841 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 361 selfloop transitions, 137 changer transitions 0/508 dead transitions. [2024-06-21 16:02:48,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 508 transitions, 7734 flow [2024-06-21 16:02:48,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:02:48,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:02:48,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-21 16:02:48,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.654485049833887 [2024-06-21 16:02:48,842 INFO L175 Difference]: Start difference. First operand has 375 places, 479 transitions, 5835 flow. Second operand 7 states and 197 transitions. [2024-06-21 16:02:48,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 508 transitions, 7734 flow [2024-06-21 16:02:53,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 508 transitions, 7295 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 16:02:53,260 INFO L231 Difference]: Finished difference. Result has 373 places, 482 transitions, 5729 flow [2024-06-21 16:02:53,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5396, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5729, PETRI_PLACES=373, PETRI_TRANSITIONS=482} [2024-06-21 16:02:53,260 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 329 predicate places. [2024-06-21 16:02:53,260 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 482 transitions, 5729 flow [2024-06-21 16:02:53,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:53,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:53,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:53,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 16:02:53,261 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:53,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:53,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1693672182, now seen corresponding path program 16 times [2024-06-21 16:02:53,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:53,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890369752] [2024-06-21 16:02:53,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:53,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:53,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:53,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:53,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890369752] [2024-06-21 16:02:53,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890369752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:53,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:53,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:02:53,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252754120] [2024-06-21 16:02:53,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:53,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:02:53,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:53,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:02:53,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:02:53,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:02:53,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 482 transitions, 5729 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:53,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:53,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:02:53,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:54,218 INFO L124 PetriNetUnfolderBase]: 2975/5197 cut-off events. [2024-06-21 16:02:54,218 INFO L125 PetriNetUnfolderBase]: For 788499/788499 co-relation queries the response was YES. [2024-06-21 16:02:54,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38030 conditions, 5197 events. 2975/5197 cut-off events. For 788499/788499 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 36099 event pairs, 576 based on Foata normal form. 1/5182 useless extension candidates. Maximal degree in co-relation 37854. Up to 4336 conditions per place. [2024-06-21 16:02:54,293 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 358 selfloop transitions, 139 changer transitions 0/507 dead transitions. [2024-06-21 16:02:54,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 507 transitions, 7364 flow [2024-06-21 16:02:54,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:02:54,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:02:54,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-21 16:02:54,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6378737541528239 [2024-06-21 16:02:54,295 INFO L175 Difference]: Start difference. First operand has 373 places, 482 transitions, 5729 flow. Second operand 7 states and 192 transitions. [2024-06-21 16:02:54,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 507 transitions, 7364 flow [2024-06-21 16:02:58,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 507 transitions, 6668 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-21 16:02:58,963 INFO L231 Difference]: Finished difference. Result has 371 places, 485 transitions, 5376 flow [2024-06-21 16:02:58,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5051, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5376, PETRI_PLACES=371, PETRI_TRANSITIONS=485} [2024-06-21 16:02:58,963 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 327 predicate places. [2024-06-21 16:02:58,964 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 485 transitions, 5376 flow [2024-06-21 16:02:58,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:58,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:58,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:58,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 16:02:58,964 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:58,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:58,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1788794122, now seen corresponding path program 17 times [2024-06-21 16:02:58,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:58,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475997038] [2024-06-21 16:02:58,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:58,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:58,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:59,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:59,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:59,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475997038] [2024-06-21 16:02:59,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475997038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:59,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:59,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:59,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698055451] [2024-06-21 16:02:59,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:59,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:59,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:59,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:59,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:59,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:02:59,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 485 transitions, 5376 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:59,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:59,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:02:59,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:59,993 INFO L124 PetriNetUnfolderBase]: 2980/5191 cut-off events. [2024-06-21 16:02:59,994 INFO L125 PetriNetUnfolderBase]: For 795827/795827 co-relation queries the response was YES. [2024-06-21 16:03:00,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37986 conditions, 5191 events. 2980/5191 cut-off events. For 795827/795827 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 36039 event pairs, 608 based on Foata normal form. 1/5184 useless extension candidates. Maximal degree in co-relation 37811. Up to 4342 conditions per place. [2024-06-21 16:03:00,069 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 352 selfloop transitions, 139 changer transitions 0/501 dead transitions. [2024-06-21 16:03:00,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 501 transitions, 6704 flow [2024-06-21 16:03:00,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:03:00,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:03:00,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-21 16:03:00,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-21 16:03:00,070 INFO L175 Difference]: Start difference. First operand has 371 places, 485 transitions, 5376 flow. Second operand 8 states and 204 transitions. [2024-06-21 16:03:00,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 501 transitions, 6704 flow [2024-06-21 16:03:04,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 501 transitions, 6429 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 16:03:04,737 INFO L231 Difference]: Finished difference. Result has 375 places, 488 transitions, 5435 flow [2024-06-21 16:03:04,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5107, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5435, PETRI_PLACES=375, PETRI_TRANSITIONS=488} [2024-06-21 16:03:04,737 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 331 predicate places. [2024-06-21 16:03:04,737 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 488 transitions, 5435 flow [2024-06-21 16:03:04,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:04,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:04,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:04,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 16:03:04,738 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:03:04,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:04,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1960266066, now seen corresponding path program 18 times [2024-06-21 16:03:04,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:04,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778140332] [2024-06-21 16:03:04,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:04,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:04,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:04,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:04,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:04,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778140332] [2024-06-21 16:03:04,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778140332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:04,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:04,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:03:04,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818890272] [2024-06-21 16:03:04,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:04,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:03:04,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:04,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:03:04,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:03:04,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:03:04,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 488 transitions, 5435 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:04,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:04,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:03:04,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:05,694 INFO L124 PetriNetUnfolderBase]: 2993/5228 cut-off events. [2024-06-21 16:03:05,695 INFO L125 PetriNetUnfolderBase]: For 816519/816519 co-relation queries the response was YES. [2024-06-21 16:03:05,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38344 conditions, 5228 events. 2993/5228 cut-off events. For 816519/816519 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 36287 event pairs, 576 based on Foata normal form. 1/5213 useless extension candidates. Maximal degree in co-relation 38168. Up to 4357 conditions per place. [2024-06-21 16:03:05,771 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 355 selfloop transitions, 148 changer transitions 0/513 dead transitions. [2024-06-21 16:03:05,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 513 transitions, 7123 flow [2024-06-21 16:03:05,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:03:05,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:03:05,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-21 16:03:05,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6245847176079734 [2024-06-21 16:03:05,772 INFO L175 Difference]: Start difference. First operand has 375 places, 488 transitions, 5435 flow. Second operand 7 states and 188 transitions. [2024-06-21 16:03:05,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 513 transitions, 7123 flow [2024-06-21 16:03:10,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 513 transitions, 6893 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 16:03:10,587 INFO L231 Difference]: Finished difference. Result has 377 places, 494 transitions, 5607 flow [2024-06-21 16:03:10,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5211, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5607, PETRI_PLACES=377, PETRI_TRANSITIONS=494} [2024-06-21 16:03:10,587 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 333 predicate places. [2024-06-21 16:03:10,588 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 494 transitions, 5607 flow [2024-06-21 16:03:10,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:10,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:10,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:10,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 16:03:10,588 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:03:10,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:10,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1218250604, now seen corresponding path program 19 times [2024-06-21 16:03:10,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:10,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160746171] [2024-06-21 16:03:10,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:10,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:10,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:10,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:10,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:10,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160746171] [2024-06-21 16:03:10,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160746171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:10,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:10,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:03:10,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995947752] [2024-06-21 16:03:10,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:10,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:03:10,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:10,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:03:10,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:03:10,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:03:10,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 494 transitions, 5607 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:10,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:10,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:03:10,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:11,619 INFO L124 PetriNetUnfolderBase]: 2990/5235 cut-off events. [2024-06-21 16:03:11,619 INFO L125 PetriNetUnfolderBase]: For 819629/819629 co-relation queries the response was YES. [2024-06-21 16:03:11,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38285 conditions, 5235 events. 2990/5235 cut-off events. For 819629/819629 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 36397 event pairs, 548 based on Foata normal form. 1/5229 useless extension candidates. Maximal degree in co-relation 38107. Up to 4561 conditions per place. [2024-06-21 16:03:11,692 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 464 selfloop transitions, 37 changer transitions 0/511 dead transitions. [2024-06-21 16:03:11,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 511 transitions, 6651 flow [2024-06-21 16:03:11,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:03:11,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:03:11,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 16:03:11,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-21 16:03:11,693 INFO L175 Difference]: Start difference. First operand has 377 places, 494 transitions, 5607 flow. Second operand 7 states and 182 transitions. [2024-06-21 16:03:11,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 511 transitions, 6651 flow [2024-06-21 16:03:17,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 511 transitions, 6377 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 16:03:17,111 INFO L231 Difference]: Finished difference. Result has 381 places, 494 transitions, 5413 flow [2024-06-21 16:03:17,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5333, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5413, PETRI_PLACES=381, PETRI_TRANSITIONS=494} [2024-06-21 16:03:17,111 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 337 predicate places. [2024-06-21 16:03:17,112 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 494 transitions, 5413 flow [2024-06-21 16:03:17,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:17,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:17,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:17,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 16:03:17,112 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:03:17,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:17,113 INFO L85 PathProgramCache]: Analyzing trace with hash 259524914, now seen corresponding path program 20 times [2024-06-21 16:03:17,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:17,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473892190] [2024-06-21 16:03:17,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:17,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:17,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:17,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:17,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:17,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473892190] [2024-06-21 16:03:17,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473892190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:17,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:17,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:17,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439087649] [2024-06-21 16:03:17,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:17,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:17,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:17,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:17,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:17,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:03:17,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 494 transitions, 5413 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:17,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:17,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:03:17,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:18,242 INFO L124 PetriNetUnfolderBase]: 2987/5211 cut-off events. [2024-06-21 16:03:18,242 INFO L125 PetriNetUnfolderBase]: For 821877/821877 co-relation queries the response was YES. [2024-06-21 16:03:18,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37905 conditions, 5211 events. 2987/5211 cut-off events. For 821877/821877 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 36289 event pairs, 601 based on Foata normal form. 1/5204 useless extension candidates. Maximal degree in co-relation 37726. Up to 4351 conditions per place. [2024-06-21 16:03:18,308 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 349 selfloop transitions, 149 changer transitions 0/508 dead transitions. [2024-06-21 16:03:18,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 508 transitions, 6985 flow [2024-06-21 16:03:18,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:03:18,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:03:18,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 16:03:18,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959302325581395 [2024-06-21 16:03:18,309 INFO L175 Difference]: Start difference. First operand has 381 places, 494 transitions, 5413 flow. Second operand 8 states and 205 transitions. [2024-06-21 16:03:18,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 508 transitions, 6985 flow [2024-06-21 16:03:22,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 508 transitions, 6887 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 16:03:22,438 INFO L231 Difference]: Finished difference. Result has 384 places, 494 transitions, 5619 flow [2024-06-21 16:03:22,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5315, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5619, PETRI_PLACES=384, PETRI_TRANSITIONS=494} [2024-06-21 16:03:22,439 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 340 predicate places. [2024-06-21 16:03:22,439 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 494 transitions, 5619 flow [2024-06-21 16:03:22,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:22,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:22,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:22,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 16:03:22,439 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:03:22,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:22,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1278494002, now seen corresponding path program 21 times [2024-06-21 16:03:22,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:22,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606882726] [2024-06-21 16:03:22,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:22,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:22,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:22,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606882726] [2024-06-21 16:03:22,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606882726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:22,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:22,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:22,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907605236] [2024-06-21 16:03:22,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:22,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:22,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:22,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:22,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:22,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:03:22,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 494 transitions, 5619 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:22,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:22,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:03:22,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:23,466 INFO L124 PetriNetUnfolderBase]: 2984/5221 cut-off events. [2024-06-21 16:03:23,466 INFO L125 PetriNetUnfolderBase]: For 824506/824506 co-relation queries the response was YES. [2024-06-21 16:03:23,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38099 conditions, 5221 events. 2984/5221 cut-off events. For 824506/824506 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 36386 event pairs, 561 based on Foata normal form. 1/5217 useless extension candidates. Maximal degree in co-relation 37919. Up to 4553 conditions per place. [2024-06-21 16:03:23,543 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 459 selfloop transitions, 37 changer transitions 0/506 dead transitions. [2024-06-21 16:03:23,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 506 transitions, 6639 flow [2024-06-21 16:03:23,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:03:23,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:03:23,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 16:03:23,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5726744186046512 [2024-06-21 16:03:23,545 INFO L175 Difference]: Start difference. First operand has 384 places, 494 transitions, 5619 flow. Second operand 8 states and 197 transitions. [2024-06-21 16:03:23,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 506 transitions, 6639 flow [2024-06-21 16:03:28,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 506 transitions, 6223 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 16:03:28,668 INFO L231 Difference]: Finished difference. Result has 385 places, 494 transitions, 5283 flow [2024-06-21 16:03:28,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5203, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5283, PETRI_PLACES=385, PETRI_TRANSITIONS=494} [2024-06-21 16:03:28,669 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 341 predicate places. [2024-06-21 16:03:28,669 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 494 transitions, 5283 flow [2024-06-21 16:03:28,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:28,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:28,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:28,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 16:03:28,669 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:03:28,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:28,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1018360600, now seen corresponding path program 22 times [2024-06-21 16:03:28,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:28,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113490890] [2024-06-21 16:03:28,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:28,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:28,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:28,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:28,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113490890] [2024-06-21 16:03:28,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113490890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:28,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:28,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:28,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745135054] [2024-06-21 16:03:28,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:28,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:28,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:28,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:28,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:28,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:03:28,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 494 transitions, 5283 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:28,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:28,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:03:28,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:29,656 INFO L124 PetriNetUnfolderBase]: 2981/5203 cut-off events. [2024-06-21 16:03:29,656 INFO L125 PetriNetUnfolderBase]: For 824592/824592 co-relation queries the response was YES. [2024-06-21 16:03:29,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37649 conditions, 5203 events. 2981/5203 cut-off events. For 824592/824592 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 36227 event pairs, 601 based on Foata normal form. 1/5196 useless extension candidates. Maximal degree in co-relation 37468. Up to 4345 conditions per place. [2024-06-21 16:03:29,733 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 347 selfloop transitions, 151 changer transitions 0/508 dead transitions. [2024-06-21 16:03:29,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 508 transitions, 6311 flow [2024-06-21 16:03:29,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:03:29,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:03:29,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-06-21 16:03:29,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744186046511628 [2024-06-21 16:03:29,734 INFO L175 Difference]: Start difference. First operand has 385 places, 494 transitions, 5283 flow. Second operand 10 states and 247 transitions. [2024-06-21 16:03:29,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 508 transitions, 6311 flow [2024-06-21 16:03:35,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 508 transitions, 6179 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 16:03:35,333 INFO L231 Difference]: Finished difference. Result has 386 places, 494 transitions, 5459 flow [2024-06-21 16:03:35,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5151, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5459, PETRI_PLACES=386, PETRI_TRANSITIONS=494} [2024-06-21 16:03:35,334 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 342 predicate places. [2024-06-21 16:03:35,334 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 494 transitions, 5459 flow [2024-06-21 16:03:35,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:35,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:35,335 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] [2024-06-21 16:03:35,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 16:03:35,335 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:03:35,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:35,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1536266730, now seen corresponding path program 3 times [2024-06-21 16:03:35,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:35,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878637212] [2024-06-21 16:03:35,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:35,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:35,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:35,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:35,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:35,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878637212] [2024-06-21 16:03:35,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878637212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:35,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:35,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:35,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920969122] [2024-06-21 16:03:35,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:35,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:35,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:35,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:35,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:35,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:03:35,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 494 transitions, 5459 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:35,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:35,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:03:35,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:36,369 INFO L124 PetriNetUnfolderBase]: 3002/5246 cut-off events. [2024-06-21 16:03:36,369 INFO L125 PetriNetUnfolderBase]: For 869415/869415 co-relation queries the response was YES. [2024-06-21 16:03:36,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38758 conditions, 5246 events. 3002/5246 cut-off events. For 869415/869415 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 36452 event pairs, 544 based on Foata normal form. 2/5243 useless extension candidates. Maximal degree in co-relation 38576. Up to 4467 conditions per place. [2024-06-21 16:03:36,446 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 451 selfloop transitions, 65 changer transitions 0/526 dead transitions. [2024-06-21 16:03:36,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 526 transitions, 7021 flow [2024-06-21 16:03:36,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:03:36,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:03:36,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-21 16:03:36,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.599483204134367 [2024-06-21 16:03:36,447 INFO L175 Difference]: Start difference. First operand has 386 places, 494 transitions, 5459 flow. Second operand 9 states and 232 transitions. [2024-06-21 16:03:36,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 526 transitions, 7021 flow [2024-06-21 16:03:42,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 526 transitions, 6468 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-06-21 16:03:42,312 INFO L231 Difference]: Finished difference. Result has 382 places, 498 transitions, 5229 flow [2024-06-21 16:03:42,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4906, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5229, PETRI_PLACES=382, PETRI_TRANSITIONS=498} [2024-06-21 16:03:42,312 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 338 predicate places. [2024-06-21 16:03:42,312 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 498 transitions, 5229 flow [2024-06-21 16:03:42,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:42,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:42,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:42,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 16:03:42,313 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:03:42,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:42,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1364048728, now seen corresponding path program 4 times [2024-06-21 16:03:42,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:42,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719558105] [2024-06-21 16:03:42,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:42,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:42,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:42,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:42,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:42,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719558105] [2024-06-21 16:03:42,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719558105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:42,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:42,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:42,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927187282] [2024-06-21 16:03:42,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:42,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:42,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:42,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:42,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:42,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:03:42,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 498 transitions, 5229 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:42,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:42,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:03:42,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:43,412 INFO L124 PetriNetUnfolderBase]: 2997/5246 cut-off events. [2024-06-21 16:03:43,413 INFO L125 PetriNetUnfolderBase]: For 861306/861306 co-relation queries the response was YES. [2024-06-21 16:03:43,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38328 conditions, 5246 events. 2997/5246 cut-off events. For 861306/861306 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 36548 event pairs, 552 based on Foata normal form. 2/5243 useless extension candidates. Maximal degree in co-relation 38146. Up to 4495 conditions per place. [2024-06-21 16:03:43,493 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 450 selfloop transitions, 60 changer transitions 0/520 dead transitions. [2024-06-21 16:03:43,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 520 transitions, 6303 flow [2024-06-21 16:03:43,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:03:43,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:03:43,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-21 16:03:43,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5988372093023255 [2024-06-21 16:03:43,494 INFO L175 Difference]: Start difference. First operand has 382 places, 498 transitions, 5229 flow. Second operand 8 states and 206 transitions. [2024-06-21 16:03:43,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 520 transitions, 6303 flow [2024-06-21 16:03:49,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 520 transitions, 6059 flow, removed 86 selfloop flow, removed 5 redundant places. [2024-06-21 16:03:49,026 INFO L231 Difference]: Finished difference. Result has 385 places, 498 transitions, 5110 flow [2024-06-21 16:03:49,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4985, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5110, PETRI_PLACES=385, PETRI_TRANSITIONS=498} [2024-06-21 16:03:49,026 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 341 predicate places. [2024-06-21 16:03:49,026 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 498 transitions, 5110 flow [2024-06-21 16:03:49,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:49,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:49,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:49,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 16:03:49,027 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:03:49,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:49,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1964852824, now seen corresponding path program 2 times [2024-06-21 16:03:49,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:49,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465893165] [2024-06-21 16:03:49,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:49,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:49,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:49,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:49,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465893165] [2024-06-21 16:03:49,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465893165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:49,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:49,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:49,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95442511] [2024-06-21 16:03:49,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:49,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:49,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:49,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:49,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:49,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:03:49,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 498 transitions, 5110 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:49,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:49,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:03:49,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:50,168 INFO L124 PetriNetUnfolderBase]: 3002/5253 cut-off events. [2024-06-21 16:03:50,169 INFO L125 PetriNetUnfolderBase]: For 859077/859077 co-relation queries the response was YES. [2024-06-21 16:03:50,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38303 conditions, 5253 events. 3002/5253 cut-off events. For 859077/859077 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 36612 event pairs, 556 based on Foata normal form. 1/5247 useless extension candidates. Maximal degree in co-relation 38119. Up to 4371 conditions per place. [2024-06-21 16:03:50,241 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 394 selfloop transitions, 121 changer transitions 0/525 dead transitions. [2024-06-21 16:03:50,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 525 transitions, 7094 flow [2024-06-21 16:03:50,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:03:50,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:03:50,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-21 16:03:50,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6191860465116279 [2024-06-21 16:03:50,242 INFO L175 Difference]: Start difference. First operand has 385 places, 498 transitions, 5110 flow. Second operand 8 states and 213 transitions. [2024-06-21 16:03:50,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 525 transitions, 7094 flow [2024-06-21 16:03:55,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 525 transitions, 6954 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 16:03:55,632 INFO L231 Difference]: Finished difference. Result has 386 places, 501 transitions, 5268 flow [2024-06-21 16:03:55,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4970, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5268, PETRI_PLACES=386, PETRI_TRANSITIONS=501} [2024-06-21 16:03:55,632 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 342 predicate places. [2024-06-21 16:03:55,632 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 501 transitions, 5268 flow [2024-06-21 16:03:55,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:55,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:55,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:55,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 16:03:55,633 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:03:55,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:55,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1925172072, now seen corresponding path program 3 times [2024-06-21 16:03:55,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:55,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876296050] [2024-06-21 16:03:55,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:55,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:55,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:55,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:55,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:55,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876296050] [2024-06-21 16:03:55,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876296050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:55,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:55,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:03:55,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272572361] [2024-06-21 16:03:55,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:55,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:03:55,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:55,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:03:55,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:03:55,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:03:55,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 501 transitions, 5268 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:55,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:55,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:03:55,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:56,655 INFO L124 PetriNetUnfolderBase]: 3007/5271 cut-off events. [2024-06-21 16:03:56,656 INFO L125 PetriNetUnfolderBase]: For 871227/871227 co-relation queries the response was YES. [2024-06-21 16:03:56,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38585 conditions, 5271 events. 3007/5271 cut-off events. For 871227/871227 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 36730 event pairs, 542 based on Foata normal form. 1/5271 useless extension candidates. Maximal degree in co-relation 38400. Up to 4614 conditions per place. [2024-06-21 16:03:56,738 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 489 selfloop transitions, 27 changer transitions 0/526 dead transitions. [2024-06-21 16:03:56,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 526 transitions, 6686 flow [2024-06-21 16:03:56,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:03:56,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:03:56,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 16:03:56,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5901162790697675 [2024-06-21 16:03:56,739 INFO L175 Difference]: Start difference. First operand has 386 places, 501 transitions, 5268 flow. Second operand 8 states and 203 transitions. [2024-06-21 16:03:56,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 526 transitions, 6686 flow [2024-06-21 16:04:02,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 526 transitions, 6218 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 16:04:02,066 INFO L231 Difference]: Finished difference. Result has 385 places, 504 transitions, 4908 flow [2024-06-21 16:04:02,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4809, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4908, PETRI_PLACES=385, PETRI_TRANSITIONS=504} [2024-06-21 16:04:02,066 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 341 predicate places. [2024-06-21 16:04:02,067 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 504 transitions, 4908 flow [2024-06-21 16:04:02,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:02,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:02,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:04:02,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 16:04:02,067 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:04:02,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:02,068 INFO L85 PathProgramCache]: Analyzing trace with hash 480481576, now seen corresponding path program 4 times [2024-06-21 16:04:02,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:02,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964888851] [2024-06-21 16:04:02,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:02,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:02,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:02,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:02,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964888851] [2024-06-21 16:04:02,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964888851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:02,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:02,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:04:02,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057337942] [2024-06-21 16:04:02,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:02,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:04:02,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:02,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:04:02,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:04:02,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:04:02,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 504 transitions, 4908 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:02,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:02,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:04:02,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:03,152 INFO L124 PetriNetUnfolderBase]: 3004/5267 cut-off events. [2024-06-21 16:04:03,152 INFO L125 PetriNetUnfolderBase]: For 870369/870369 co-relation queries the response was YES. [2024-06-21 16:04:03,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38120 conditions, 5267 events. 3004/5267 cut-off events. For 870369/870369 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 36764 event pairs, 542 based on Foata normal form. 1/5267 useless extension candidates. Maximal degree in co-relation 37935. Up to 4611 conditions per place. [2024-06-21 16:04:03,237 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 489 selfloop transitions, 27 changer transitions 0/526 dead transitions. [2024-06-21 16:04:03,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 526 transitions, 5994 flow [2024-06-21 16:04:03,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:04:03,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:04:03,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-21 16:04:03,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762273901808785 [2024-06-21 16:04:03,238 INFO L175 Difference]: Start difference. First operand has 385 places, 504 transitions, 4908 flow. Second operand 9 states and 223 transitions. [2024-06-21 16:04:03,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 526 transitions, 5994 flow [2024-06-21 16:04:08,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 526 transitions, 5914 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 16:04:08,370 INFO L231 Difference]: Finished difference. Result has 388 places, 504 transitions, 4888 flow [2024-06-21 16:04:08,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4828, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4888, PETRI_PLACES=388, PETRI_TRANSITIONS=504} [2024-06-21 16:04:08,370 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 344 predicate places. [2024-06-21 16:04:08,371 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 504 transitions, 4888 flow [2024-06-21 16:04:08,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:08,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:08,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:04:08,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 16:04:08,371 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:04:08,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:08,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1661270440, now seen corresponding path program 5 times [2024-06-21 16:04:08,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:08,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569972656] [2024-06-21 16:04:08,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:08,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:08,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:08,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:08,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:08,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569972656] [2024-06-21 16:04:08,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569972656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:08,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:08,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:04:08,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429695671] [2024-06-21 16:04:08,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:08,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:04:08,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:08,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:04:08,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:04:08,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:04:08,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 504 transitions, 4888 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:08,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:08,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:04:08,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:09,342 INFO L124 PetriNetUnfolderBase]: 3009/5267 cut-off events. [2024-06-21 16:04:09,343 INFO L125 PetriNetUnfolderBase]: For 882238/882238 co-relation queries the response was YES. [2024-06-21 16:04:09,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38222 conditions, 5267 events. 3009/5267 cut-off events. For 882238/882238 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 36793 event pairs, 556 based on Foata normal form. 1/5261 useless extension candidates. Maximal degree in co-relation 38036. Up to 4380 conditions per place. [2024-06-21 16:04:09,424 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 393 selfloop transitions, 127 changer transitions 0/530 dead transitions. [2024-06-21 16:04:09,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 530 transitions, 6881 flow [2024-06-21 16:04:09,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:04:09,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:04:09,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-21 16:04:09,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6378737541528239 [2024-06-21 16:04:09,426 INFO L175 Difference]: Start difference. First operand has 388 places, 504 transitions, 4888 flow. Second operand 7 states and 192 transitions. [2024-06-21 16:04:09,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 530 transitions, 6881 flow [2024-06-21 16:04:14,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 530 transitions, 6813 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 16:04:14,964 INFO L231 Difference]: Finished difference. Result has 387 places, 507 transitions, 5113 flow [2024-06-21 16:04:14,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4820, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5113, PETRI_PLACES=387, PETRI_TRANSITIONS=507} [2024-06-21 16:04:14,964 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 343 predicate places. [2024-06-21 16:04:14,964 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 507 transitions, 5113 flow [2024-06-21 16:04:14,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:14,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:14,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:04:14,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 16:04:14,965 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:04:14,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:14,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1301517478, now seen corresponding path program 5 times [2024-06-21 16:04:14,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:14,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469841165] [2024-06-21 16:04:14,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:14,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:15,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:15,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469841165] [2024-06-21 16:04:15,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469841165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:15,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:15,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:04:15,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453183108] [2024-06-21 16:04:15,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:15,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:04:15,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:15,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:04:15,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:04:15,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:04:15,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 507 transitions, 5113 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:15,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:15,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:04:15,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:16,020 INFO L124 PetriNetUnfolderBase]: 3017/5285 cut-off events. [2024-06-21 16:04:16,020 INFO L125 PetriNetUnfolderBase]: For 907412/907412 co-relation queries the response was YES. [2024-06-21 16:04:16,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38792 conditions, 5285 events. 3017/5285 cut-off events. For 907412/907412 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 36943 event pairs, 554 based on Foata normal form. 2/5282 useless extension candidates. Maximal degree in co-relation 38605. Up to 4524 conditions per place. [2024-06-21 16:04:16,099 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 455 selfloop transitions, 60 changer transitions 0/525 dead transitions. [2024-06-21 16:04:16,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 525 transitions, 6277 flow [2024-06-21 16:04:16,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:04:16,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:04:16,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 16:04:16,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-21 16:04:16,100 INFO L175 Difference]: Start difference. First operand has 387 places, 507 transitions, 5113 flow. Second operand 8 states and 200 transitions. [2024-06-21 16:04:16,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 525 transitions, 6277 flow [2024-06-21 16:04:23,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 525 transitions, 6007 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 16:04:23,126 INFO L231 Difference]: Finished difference. Result has 390 places, 509 transitions, 5068 flow [2024-06-21 16:04:23,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4843, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5068, PETRI_PLACES=390, PETRI_TRANSITIONS=509} [2024-06-21 16:04:23,127 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 346 predicate places. [2024-06-21 16:04:23,127 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 509 transitions, 5068 flow [2024-06-21 16:04:23,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:23,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:23,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:04:23,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 16:04:23,127 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:04:23,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:23,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1320658980, now seen corresponding path program 6 times [2024-06-21 16:04:23,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:23,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261566700] [2024-06-21 16:04:23,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:23,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:23,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:23,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:23,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261566700] [2024-06-21 16:04:23,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261566700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:23,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:23,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:04:23,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869749738] [2024-06-21 16:04:23,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:23,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:04:23,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:23,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:04:23,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:04:23,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:04:23,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 509 transitions, 5068 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:23,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:23,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:04:23,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:24,251 INFO L124 PetriNetUnfolderBase]: 3025/5297 cut-off events. [2024-06-21 16:04:24,251 INFO L125 PetriNetUnfolderBase]: For 921466/921466 co-relation queries the response was YES. [2024-06-21 16:04:24,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38991 conditions, 5297 events. 3025/5297 cut-off events. For 921466/921466 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 37049 event pairs, 552 based on Foata normal form. 2/5294 useless extension candidates. Maximal degree in co-relation 38803. Up to 4516 conditions per place. [2024-06-21 16:04:24,333 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 454 selfloop transitions, 65 changer transitions 0/529 dead transitions. [2024-06-21 16:04:24,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 529 transitions, 6248 flow [2024-06-21 16:04:24,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:04:24,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:04:24,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-21 16:04:24,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5736434108527132 [2024-06-21 16:04:24,334 INFO L175 Difference]: Start difference. First operand has 390 places, 509 transitions, 5068 flow. Second operand 9 states and 222 transitions. [2024-06-21 16:04:24,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 529 transitions, 6248 flow [2024-06-21 16:04:31,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 529 transitions, 6039 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-21 16:04:31,508 INFO L231 Difference]: Finished difference. Result has 393 places, 511 transitions, 5098 flow [2024-06-21 16:04:31,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4859, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5098, PETRI_PLACES=393, PETRI_TRANSITIONS=511} [2024-06-21 16:04:31,509 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 349 predicate places. [2024-06-21 16:04:31,509 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 511 transitions, 5098 flow [2024-06-21 16:04:31,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:31,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:31,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:04:31,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 16:04:31,509 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:04:31,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:31,510 INFO L85 PathProgramCache]: Analyzing trace with hash -972344266, now seen corresponding path program 6 times [2024-06-21 16:04:31,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:31,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333663070] [2024-06-21 16:04:31,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:31,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:31,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:31,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:31,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333663070] [2024-06-21 16:04:31,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333663070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:31,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:31,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:04:31,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040988174] [2024-06-21 16:04:31,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:31,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:04:31,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:31,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:04:31,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:04:31,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:04:31,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 511 transitions, 5098 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:31,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:31,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:04:31,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:32,655 INFO L124 PetriNetUnfolderBase]: 3030/5304 cut-off events. [2024-06-21 16:04:32,655 INFO L125 PetriNetUnfolderBase]: For 921272/921272 co-relation queries the response was YES. [2024-06-21 16:04:32,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39060 conditions, 5304 events. 3030/5304 cut-off events. For 921272/921272 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 37066 event pairs, 558 based on Foata normal form. 1/5298 useless extension candidates. Maximal degree in co-relation 38871. Up to 4410 conditions per place. [2024-06-21 16:04:32,738 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 398 selfloop transitions, 122 changer transitions 0/530 dead transitions. [2024-06-21 16:04:32,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 530 transitions, 6517 flow [2024-06-21 16:04:32,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:04:32,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:04:32,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-21 16:04:32,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5988372093023255 [2024-06-21 16:04:32,740 INFO L175 Difference]: Start difference. First operand has 393 places, 511 transitions, 5098 flow. Second operand 8 states and 206 transitions. [2024-06-21 16:04:32,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 530 transitions, 6517 flow [2024-06-21 16:04:40,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 530 transitions, 6294 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-21 16:04:40,545 INFO L231 Difference]: Finished difference. Result has 394 places, 514 transitions, 5172 flow [2024-06-21 16:04:40,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4875, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5172, PETRI_PLACES=394, PETRI_TRANSITIONS=514} [2024-06-21 16:04:40,545 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 350 predicate places. [2024-06-21 16:04:40,545 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 514 transitions, 5172 flow [2024-06-21 16:04:40,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:40,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:40,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:04:40,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 16:04:40,546 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:04:40,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:40,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1272501766, now seen corresponding path program 7 times [2024-06-21 16:04:40,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:40,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012003722] [2024-06-21 16:04:40,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:40,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:40,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:40,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:40,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012003722] [2024-06-21 16:04:40,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012003722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:40,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:40,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:04:40,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559258054] [2024-06-21 16:04:40,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:40,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:04:40,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:40,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:04:40,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:04:40,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:04:40,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 514 transitions, 5172 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:40,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:40,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:04:40,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:41,742 INFO L124 PetriNetUnfolderBase]: 3043/5326 cut-off events. [2024-06-21 16:04:41,742 INFO L125 PetriNetUnfolderBase]: For 942366/942366 co-relation queries the response was YES. [2024-06-21 16:04:41,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39391 conditions, 5326 events. 3043/5326 cut-off events. For 942366/942366 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 37273 event pairs, 558 based on Foata normal form. 1/5320 useless extension candidates. Maximal degree in co-relation 39201. Up to 4425 conditions per place. [2024-06-21 16:04:41,821 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 394 selfloop transitions, 136 changer transitions 0/540 dead transitions. [2024-06-21 16:04:41,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 540 transitions, 7260 flow [2024-06-21 16:04:41,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:04:41,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:04:41,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-21 16:04:41,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6245847176079734 [2024-06-21 16:04:41,822 INFO L175 Difference]: Start difference. First operand has 394 places, 514 transitions, 5172 flow. Second operand 7 states and 188 transitions. [2024-06-21 16:04:41,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 540 transitions, 7260 flow [2024-06-21 16:04:48,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 540 transitions, 7062 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 16:04:48,481 INFO L231 Difference]: Finished difference. Result has 396 places, 520 transitions, 5344 flow [2024-06-21 16:04:48,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4980, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5344, PETRI_PLACES=396, PETRI_TRANSITIONS=520} [2024-06-21 16:04:48,482 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 352 predicate places. [2024-06-21 16:04:48,482 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 520 transitions, 5344 flow [2024-06-21 16:04:48,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:48,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:48,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:04:48,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 16:04:48,483 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:04:48,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:48,483 INFO L85 PathProgramCache]: Analyzing trace with hash 2012559368, now seen corresponding path program 8 times [2024-06-21 16:04:48,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:48,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583905657] [2024-06-21 16:04:48,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:48,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:48,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:48,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:48,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:48,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583905657] [2024-06-21 16:04:48,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583905657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:48,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:48,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:04:48,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411164316] [2024-06-21 16:04:48,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:48,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:04:48,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:48,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:04:48,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:04:48,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:04:48,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 520 transitions, 5344 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:48,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:48,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:04:48,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:49,731 INFO L124 PetriNetUnfolderBase]: 3056/5348 cut-off events. [2024-06-21 16:04:49,732 INFO L125 PetriNetUnfolderBase]: For 966670/966670 co-relation queries the response was YES. [2024-06-21 16:04:49,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39817 conditions, 5348 events. 3056/5348 cut-off events. For 966670/966670 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 37474 event pairs, 558 based on Foata normal form. 1/5342 useless extension candidates. Maximal degree in co-relation 39626. Up to 4440 conditions per place. [2024-06-21 16:04:49,808 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 399 selfloop transitions, 134 changer transitions 0/543 dead transitions. [2024-06-21 16:04:49,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 543 transitions, 7158 flow [2024-06-21 16:04:49,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:04:49,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:04:49,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-21 16:04:49,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6017441860465116 [2024-06-21 16:04:49,809 INFO L175 Difference]: Start difference. First operand has 396 places, 520 transitions, 5344 flow. Second operand 8 states and 207 transitions. [2024-06-21 16:04:49,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 543 transitions, 7158 flow [2024-06-21 16:04:56,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 543 transitions, 6914 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 16:04:56,156 INFO L231 Difference]: Finished difference. Result has 401 places, 526 transitions, 5486 flow [2024-06-21 16:04:56,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5116, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5486, PETRI_PLACES=401, PETRI_TRANSITIONS=526} [2024-06-21 16:04:56,157 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 357 predicate places. [2024-06-21 16:04:56,157 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 526 transitions, 5486 flow [2024-06-21 16:04:56,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:56,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:56,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:04:56,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 16:04:56,158 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:04:56,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:56,158 INFO L85 PathProgramCache]: Analyzing trace with hash -866918394, now seen corresponding path program 9 times [2024-06-21 16:04:56,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:56,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994945708] [2024-06-21 16:04:56,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:56,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:56,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:56,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:56,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994945708] [2024-06-21 16:04:56,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994945708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:56,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:56,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:04:56,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259545536] [2024-06-21 16:04:56,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:56,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:04:56,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:56,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:04:56,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:04:56,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:04:56,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 526 transitions, 5486 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:56,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:56,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:04:56,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:57,270 INFO L124 PetriNetUnfolderBase]: 3053/5344 cut-off events. [2024-06-21 16:04:57,270 INFO L125 PetriNetUnfolderBase]: For 968299/968299 co-relation queries the response was YES. [2024-06-21 16:04:57,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39714 conditions, 5344 events. 3053/5344 cut-off events. For 968299/968299 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 37428 event pairs, 558 based on Foata normal form. 1/5338 useless extension candidates. Maximal degree in co-relation 39522. Up to 4437 conditions per place. [2024-06-21 16:04:57,356 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 395 selfloop transitions, 137 changer transitions 0/542 dead transitions. [2024-06-21 16:04:57,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 542 transitions, 6888 flow [2024-06-21 16:04:57,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:04:57,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:04:57,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 16:04:57,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959302325581395 [2024-06-21 16:04:57,357 INFO L175 Difference]: Start difference. First operand has 401 places, 526 transitions, 5486 flow. Second operand 8 states and 205 transitions. [2024-06-21 16:04:57,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 542 transitions, 6888 flow [2024-06-21 16:05:04,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 542 transitions, 6670 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 16:05:04,565 INFO L231 Difference]: Finished difference. Result has 405 places, 526 transitions, 5548 flow [2024-06-21 16:05:04,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5268, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5548, PETRI_PLACES=405, PETRI_TRANSITIONS=526} [2024-06-21 16:05:04,566 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 361 predicate places. [2024-06-21 16:05:04,566 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 526 transitions, 5548 flow [2024-06-21 16:05:04,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:04,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:05:04,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:05:04,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 16:05:04,566 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:05:04,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:05:04,567 INFO L85 PathProgramCache]: Analyzing trace with hash -164452344, now seen corresponding path program 10 times [2024-06-21 16:05:04,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:05:04,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342033080] [2024-06-21 16:05:04,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:05:04,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:05:04,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:05:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:05:04,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:05:04,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342033080] [2024-06-21 16:05:04,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342033080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:05:04,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:05:04,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:05:04,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440479479] [2024-06-21 16:05:04,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:05:04,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:05:04,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:05:04,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:05:04,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:05:04,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:05:04,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 526 transitions, 5548 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:04,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:05:04,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:05:04,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:05:05,676 INFO L124 PetriNetUnfolderBase]: 3058/5353 cut-off events. [2024-06-21 16:05:05,676 INFO L125 PetriNetUnfolderBase]: For 981725/981725 co-relation queries the response was YES. [2024-06-21 16:05:05,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39858 conditions, 5353 events. 3058/5353 cut-off events. For 981725/981725 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 37514 event pairs, 558 based on Foata normal form. 1/5347 useless extension candidates. Maximal degree in co-relation 39665. Up to 4443 conditions per place. [2024-06-21 16:05:05,767 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 395 selfloop transitions, 140 changer transitions 0/545 dead transitions. [2024-06-21 16:05:05,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 545 transitions, 7006 flow [2024-06-21 16:05:05,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:05:05,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:05:05,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 16:05:05,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959302325581395 [2024-06-21 16:05:05,768 INFO L175 Difference]: Start difference. First operand has 405 places, 526 transitions, 5548 flow. Second operand 8 states and 205 transitions. [2024-06-21 16:05:05,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 545 transitions, 7006 flow [2024-06-21 16:05:13,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 545 transitions, 6617 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 16:05:13,114 INFO L231 Difference]: Finished difference. Result has 405 places, 529 transitions, 5493 flow [2024-06-21 16:05:13,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5168, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5493, PETRI_PLACES=405, PETRI_TRANSITIONS=529} [2024-06-21 16:05:13,114 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 361 predicate places. [2024-06-21 16:05:13,115 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 529 transitions, 5493 flow [2024-06-21 16:05:13,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:13,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:05:13,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:05:13,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 16:05:13,115 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:05:13,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:05:13,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1922413848, now seen corresponding path program 1 times [2024-06-21 16:05:13,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:05:13,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422985693] [2024-06-21 16:05:13,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:05:13,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:05:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:05:13,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:05:13,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:05:13,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422985693] [2024-06-21 16:05:13,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422985693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:05:13,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:05:13,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:05:13,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572014315] [2024-06-21 16:05:13,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:05:13,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:05:13,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:05:13,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:05:13,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:05:13,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:05:13,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 529 transitions, 5493 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:13,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:05:13,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:05:13,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:05:14,225 INFO L124 PetriNetUnfolderBase]: 3066/5365 cut-off events. [2024-06-21 16:05:14,226 INFO L125 PetriNetUnfolderBase]: For 1005675/1005675 co-relation queries the response was YES. [2024-06-21 16:05:14,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40048 conditions, 5365 events. 3066/5365 cut-off events. For 1005675/1005675 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 37553 event pairs, 558 based on Foata normal form. 2/5360 useless extension candidates. Maximal degree in co-relation 39854. Up to 4618 conditions per place. [2024-06-21 16:05:14,316 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 475 selfloop transitions, 64 changer transitions 0/549 dead transitions. [2024-06-21 16:05:14,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 549 transitions, 6681 flow [2024-06-21 16:05:14,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:05:14,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:05:14,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 16:05:14,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-21 16:05:14,317 INFO L175 Difference]: Start difference. First operand has 405 places, 529 transitions, 5493 flow. Second operand 7 states and 182 transitions. [2024-06-21 16:05:14,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 549 transitions, 6681 flow [2024-06-21 16:05:21,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 549 transitions, 6468 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 16:05:21,875 INFO L231 Difference]: Finished difference. Result has 407 places, 531 transitions, 5483 flow [2024-06-21 16:05:21,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5280, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5483, PETRI_PLACES=407, PETRI_TRANSITIONS=531} [2024-06-21 16:05:21,876 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 363 predicate places. [2024-06-21 16:05:21,876 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 531 transitions, 5483 flow [2024-06-21 16:05:21,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:21,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:05:21,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:05:21,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 16:05:21,876 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:05:21,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:05:21,877 INFO L85 PathProgramCache]: Analyzing trace with hash 803412222, now seen corresponding path program 2 times [2024-06-21 16:05:21,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:05:21,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72497397] [2024-06-21 16:05:21,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:05:21,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:05:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:05:21,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:05:21,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:05:21,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72497397] [2024-06-21 16:05:21,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72497397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:05:21,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:05:21,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:05:21,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270544396] [2024-06-21 16:05:21,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:05:21,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:05:21,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:05:21,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:05:21,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:05:22,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:05:22,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 531 transitions, 5483 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:22,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:05:22,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:05:22,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:05:23,025 INFO L124 PetriNetUnfolderBase]: 3074/5381 cut-off events. [2024-06-21 16:05:23,026 INFO L125 PetriNetUnfolderBase]: For 1020442/1020442 co-relation queries the response was YES. [2024-06-21 16:05:23,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40189 conditions, 5381 events. 3074/5381 cut-off events. For 1020442/1020442 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 37759 event pairs, 560 based on Foata normal form. 2/5376 useless extension candidates. Maximal degree in co-relation 39994. Up to 4630 conditions per place. [2024-06-21 16:05:23,114 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 477 selfloop transitions, 62 changer transitions 0/549 dead transitions. [2024-06-21 16:05:23,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 549 transitions, 6669 flow [2024-06-21 16:05:23,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:05:23,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:05:23,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 16:05:23,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-21 16:05:23,116 INFO L175 Difference]: Start difference. First operand has 407 places, 531 transitions, 5483 flow. Second operand 8 states and 200 transitions. [2024-06-21 16:05:23,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 549 transitions, 6669 flow [2024-06-21 16:05:30,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 549 transitions, 6482 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 16:05:30,392 INFO L231 Difference]: Finished difference. Result has 410 places, 533 transitions, 5499 flow [2024-06-21 16:05:30,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5296, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5499, PETRI_PLACES=410, PETRI_TRANSITIONS=533} [2024-06-21 16:05:30,393 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 366 predicate places. [2024-06-21 16:05:30,393 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 533 transitions, 5499 flow [2024-06-21 16:05:30,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:30,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:05:30,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:05:30,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 16:05:30,393 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:05:30,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:05:30,394 INFO L85 PathProgramCache]: Analyzing trace with hash -147301656, now seen corresponding path program 3 times [2024-06-21 16:05:30,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:05:30,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96761879] [2024-06-21 16:05:30,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:05:30,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:05:30,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:05:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:05:30,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:05:30,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96761879] [2024-06-21 16:05:30,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96761879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:05:30,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:05:30,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:05:30,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561239630] [2024-06-21 16:05:30,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:05:30,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:05:30,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:05:30,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:05:30,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:05:30,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:05:30,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 533 transitions, 5499 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:30,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:05:30,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:05:30,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:05:31,535 INFO L124 PetriNetUnfolderBase]: 3082/5393 cut-off events. [2024-06-21 16:05:31,535 INFO L125 PetriNetUnfolderBase]: For 1034570/1034570 co-relation queries the response was YES. [2024-06-21 16:05:31,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40396 conditions, 5393 events. 3082/5393 cut-off events. For 1034570/1034570 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 37878 event pairs, 558 based on Foata normal form. 2/5388 useless extension candidates. Maximal degree in co-relation 40200. Up to 4622 conditions per place. [2024-06-21 16:05:31,617 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 476 selfloop transitions, 67 changer transitions 0/553 dead transitions. [2024-06-21 16:05:31,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 553 transitions, 6701 flow [2024-06-21 16:05:31,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:05:31,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:05:31,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-21 16:05:31,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5736434108527132 [2024-06-21 16:05:31,619 INFO L175 Difference]: Start difference. First operand has 410 places, 533 transitions, 5499 flow. Second operand 9 states and 222 transitions. [2024-06-21 16:05:31,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 553 transitions, 6701 flow [2024-06-21 16:05:38,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 553 transitions, 6514 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 16:05:38,549 INFO L231 Difference]: Finished difference. Result has 413 places, 535 transitions, 5529 flow [2024-06-21 16:05:38,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5312, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5529, PETRI_PLACES=413, PETRI_TRANSITIONS=535} [2024-06-21 16:05:38,549 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 369 predicate places. [2024-06-21 16:05:38,550 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 535 transitions, 5529 flow [2024-06-21 16:05:38,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:38,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:05:38,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:05:38,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 16:05:38,550 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:05:38,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:05:38,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1393473362, now seen corresponding path program 11 times [2024-06-21 16:05:38,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:05:38,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850157916] [2024-06-21 16:05:38,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:05:38,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:05:38,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:05:38,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:05:38,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:05:38,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850157916] [2024-06-21 16:05:38,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850157916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:05:38,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:05:38,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:05:38,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164686494] [2024-06-21 16:05:38,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:05:38,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:05:38,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:05:38,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:05:38,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:05:38,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:05:38,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 535 transitions, 5529 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:38,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:05:38,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:05:38,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:05:39,670 INFO L124 PetriNetUnfolderBase]: 3087/5391 cut-off events. [2024-06-21 16:05:39,671 INFO L125 PetriNetUnfolderBase]: For 1035907/1035907 co-relation queries the response was YES. [2024-06-21 16:05:39,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40495 conditions, 5391 events. 3087/5391 cut-off events. For 1035907/1035907 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 37779 event pairs, 590 based on Foata normal form. 1/5375 useless extension candidates. Maximal degree in co-relation 40298. Up to 4485 conditions per place. [2024-06-21 16:05:39,755 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 403 selfloop transitions, 150 changer transitions 0/563 dead transitions. [2024-06-21 16:05:39,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 563 transitions, 7356 flow [2024-06-21 16:05:39,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:05:39,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:05:39,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-21 16:05:39,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6478405315614618 [2024-06-21 16:05:39,756 INFO L175 Difference]: Start difference. First operand has 413 places, 535 transitions, 5529 flow. Second operand 7 states and 195 transitions. [2024-06-21 16:05:39,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 563 transitions, 7356 flow [2024-06-21 16:05:46,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 563 transitions, 7155 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-21 16:05:46,723 INFO L231 Difference]: Finished difference. Result has 413 places, 538 transitions, 5673 flow [2024-06-21 16:05:46,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5328, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5673, PETRI_PLACES=413, PETRI_TRANSITIONS=538} [2024-06-21 16:05:46,723 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 369 predicate places. [2024-06-21 16:05:46,724 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 538 transitions, 5673 flow [2024-06-21 16:05:46,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:46,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:05:46,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:05:46,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 16:05:46,724 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:05:46,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:05:46,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1400139602, now seen corresponding path program 12 times [2024-06-21 16:05:46,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:05:46,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10933569] [2024-06-21 16:05:46,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:05:46,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:05:46,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:05:46,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:05:46,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:05:46,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10933569] [2024-06-21 16:05:46,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10933569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:05:46,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:05:46,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:05:46,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804503950] [2024-06-21 16:05:46,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:05:46,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:05:46,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:05:46,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:05:46,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:05:46,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:05:46,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 538 transitions, 5673 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:46,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:05:46,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:05:46,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:05:47,890 INFO L124 PetriNetUnfolderBase]: 3092/5400 cut-off events. [2024-06-21 16:05:47,890 INFO L125 PetriNetUnfolderBase]: For 1048276/1048276 co-relation queries the response was YES. [2024-06-21 16:05:47,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40709 conditions, 5400 events. 3092/5400 cut-off events. For 1048276/1048276 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 37914 event pairs, 590 based on Foata normal form. 1/5384 useless extension candidates. Maximal degree in co-relation 40511. Up to 4491 conditions per place. [2024-06-21 16:05:47,979 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 402 selfloop transitions, 151 changer transitions 0/563 dead transitions. [2024-06-21 16:05:47,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 563 transitions, 7502 flow [2024-06-21 16:05:47,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:05:47,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:05:47,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-21 16:05:47,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6378737541528239 [2024-06-21 16:05:47,980 INFO L175 Difference]: Start difference. First operand has 413 places, 538 transitions, 5673 flow. Second operand 7 states and 192 transitions. [2024-06-21 16:05:47,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 563 transitions, 7502 flow [2024-06-21 16:05:56,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 563 transitions, 7180 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 16:05:56,332 INFO L231 Difference]: Finished difference. Result has 415 places, 541 transitions, 5704 flow [2024-06-21 16:05:56,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5357, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5704, PETRI_PLACES=415, PETRI_TRANSITIONS=541} [2024-06-21 16:05:56,332 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 371 predicate places. [2024-06-21 16:05:56,333 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 541 transitions, 5704 flow [2024-06-21 16:05:56,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:56,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:05:56,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:05:56,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 16:05:56,333 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:05:56,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:05:56,333 INFO L85 PathProgramCache]: Analyzing trace with hash 61166508, now seen corresponding path program 4 times [2024-06-21 16:05:56,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:05:56,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262352295] [2024-06-21 16:05:56,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:05:56,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:05:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:05:56,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:05:56,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:05:56,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262352295] [2024-06-21 16:05:56,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262352295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:05:56,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:05:56,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:05:56,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681618039] [2024-06-21 16:05:56,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:05:56,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:05:56,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:05:56,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:05:56,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:05:56,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:05:56,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 541 transitions, 5704 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:56,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:05:56,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:05:56,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:05:57,461 INFO L124 PetriNetUnfolderBase]: 3100/5421 cut-off events. [2024-06-21 16:05:57,461 INFO L125 PetriNetUnfolderBase]: For 1074825/1074825 co-relation queries the response was YES. [2024-06-21 16:05:57,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40955 conditions, 5421 events. 3100/5421 cut-off events. For 1074825/1074825 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 38051 event pairs, 564 based on Foata normal form. 2/5413 useless extension candidates. Maximal degree in co-relation 40756. Up to 4668 conditions per place. [2024-06-21 16:05:57,545 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 488 selfloop transitions, 66 changer transitions 0/564 dead transitions. [2024-06-21 16:05:57,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 564 transitions, 6942 flow [2024-06-21 16:05:57,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:05:57,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:05:57,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-21 16:05:57,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6179401993355482 [2024-06-21 16:05:57,547 INFO L175 Difference]: Start difference. First operand has 415 places, 541 transitions, 5704 flow. Second operand 7 states and 186 transitions. [2024-06-21 16:05:57,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 564 transitions, 6942 flow [2024-06-21 16:06:06,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 564 transitions, 6643 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 16:06:06,105 INFO L231 Difference]: Finished difference. Result has 418 places, 543 transitions, 5624 flow [2024-06-21 16:06:06,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5405, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5624, PETRI_PLACES=418, PETRI_TRANSITIONS=543} [2024-06-21 16:06:06,105 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 374 predicate places. [2024-06-21 16:06:06,105 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 543 transitions, 5624 flow [2024-06-21 16:06:06,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:06,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:06:06,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:06:06,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 16:06:06,106 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:06:06,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:06:06,106 INFO L85 PathProgramCache]: Analyzing trace with hash 884233190, now seen corresponding path program 7 times [2024-06-21 16:06:06,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:06:06,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268087355] [2024-06-21 16:06:06,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:06:06,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:06:06,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:06:06,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:06:06,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:06:06,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268087355] [2024-06-21 16:06:06,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268087355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:06:06,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:06:06,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:06:06,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325988749] [2024-06-21 16:06:06,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:06:06,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:06:06,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:06:06,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:06:06,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:06:06,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:06:06,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 543 transitions, 5624 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:06,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:06:06,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:06:06,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:06:07,340 INFO L124 PetriNetUnfolderBase]: 3108/5424 cut-off events. [2024-06-21 16:06:07,341 INFO L125 PetriNetUnfolderBase]: For 1091534/1091534 co-relation queries the response was YES. [2024-06-21 16:06:07,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41130 conditions, 5424 events. 3108/5424 cut-off events. For 1091534/1091534 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 38145 event pairs, 590 based on Foata normal form. 2/5418 useless extension candidates. Maximal degree in co-relation 40930. Up to 4656 conditions per place. [2024-06-21 16:06:07,428 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 485 selfloop transitions, 63 changer transitions 0/558 dead transitions. [2024-06-21 16:06:07,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 558 transitions, 6862 flow [2024-06-21 16:06:07,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:06:07,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:06:07,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 16:06:07,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5755813953488372 [2024-06-21 16:06:07,430 INFO L175 Difference]: Start difference. First operand has 418 places, 543 transitions, 5624 flow. Second operand 8 states and 198 transitions. [2024-06-21 16:06:07,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 558 transitions, 6862 flow [2024-06-21 16:06:13,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 558 transitions, 6659 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-21 16:06:13,760 INFO L231 Difference]: Finished difference. Result has 421 places, 545 transitions, 5668 flow [2024-06-21 16:06:13,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5421, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5668, PETRI_PLACES=421, PETRI_TRANSITIONS=545} [2024-06-21 16:06:13,761 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 377 predicate places. [2024-06-21 16:06:13,761 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 545 transitions, 5668 flow [2024-06-21 16:06:13,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:13,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:06:13,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:06:13,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-21 16:06:13,761 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:06:13,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:06:13,762 INFO L85 PathProgramCache]: Analyzing trace with hash -56534860, now seen corresponding path program 8 times [2024-06-21 16:06:13,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:06:13,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735124049] [2024-06-21 16:06:13,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:06:13,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:06:13,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:06:13,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:06:13,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:06:13,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735124049] [2024-06-21 16:06:13,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735124049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:06:13,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:06:13,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:06:13,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395231907] [2024-06-21 16:06:13,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:06:13,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:06:13,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:06:13,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:06:13,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:06:13,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:06:13,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 545 transitions, 5668 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:13,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:06:13,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:06:13,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:06:15,002 INFO L124 PetriNetUnfolderBase]: 3103/5417 cut-off events. [2024-06-21 16:06:15,003 INFO L125 PetriNetUnfolderBase]: For 1078453/1078453 co-relation queries the response was YES. [2024-06-21 16:06:15,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40714 conditions, 5417 events. 3103/5417 cut-off events. For 1078453/1078453 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 38087 event pairs, 587 based on Foata normal form. 2/5411 useless extension candidates. Maximal degree in co-relation 40513. Up to 4629 conditions per place. [2024-06-21 16:06:15,096 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 484 selfloop transitions, 68 changer transitions 0/562 dead transitions. [2024-06-21 16:06:15,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 562 transitions, 6922 flow [2024-06-21 16:06:15,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:06:15,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:06:15,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-21 16:06:15,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684754521963824 [2024-06-21 16:06:15,098 INFO L175 Difference]: Start difference. First operand has 421 places, 545 transitions, 5668 flow. Second operand 9 states and 220 transitions. [2024-06-21 16:06:15,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 562 transitions, 6922 flow [2024-06-21 16:06:22,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 562 transitions, 6691 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-21 16:06:22,672 INFO L231 Difference]: Finished difference. Result has 424 places, 547 transitions, 5698 flow [2024-06-21 16:06:22,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5437, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5698, PETRI_PLACES=424, PETRI_TRANSITIONS=547} [2024-06-21 16:06:22,673 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 380 predicate places. [2024-06-21 16:06:22,673 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 547 transitions, 5698 flow [2024-06-21 16:06:22,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:22,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:06:22,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:06:22,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-21 16:06:22,673 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:06:22,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:06:22,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1195636044, now seen corresponding path program 13 times [2024-06-21 16:06:22,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:06:22,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083103116] [2024-06-21 16:06:22,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:06:22,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:06:22,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:06:22,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:06:22,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:06:22,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083103116] [2024-06-21 16:06:22,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083103116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:06:22,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:06:22,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:06:22,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077269783] [2024-06-21 16:06:22,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:06:22,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:06:22,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:06:22,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:06:22,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:06:22,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:06:22,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 547 transitions, 5698 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:22,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:06:22,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:06:22,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:06:23,979 INFO L124 PetriNetUnfolderBase]: 3108/5430 cut-off events. [2024-06-21 16:06:23,979 INFO L125 PetriNetUnfolderBase]: For 1076307/1076307 co-relation queries the response was YES. [2024-06-21 16:06:24,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40730 conditions, 5430 events. 3108/5430 cut-off events. For 1076307/1076307 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 38097 event pairs, 591 based on Foata normal form. 1/5414 useless extension candidates. Maximal degree in co-relation 40528. Up to 4514 conditions per place. [2024-06-21 16:06:24,055 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 401 selfloop transitions, 158 changer transitions 0/569 dead transitions. [2024-06-21 16:06:24,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 569 transitions, 7544 flow [2024-06-21 16:06:24,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:06:24,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:06:24,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-21 16:06:24,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6212624584717608 [2024-06-21 16:06:24,056 INFO L175 Difference]: Start difference. First operand has 424 places, 547 transitions, 5698 flow. Second operand 7 states and 187 transitions. [2024-06-21 16:06:24,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 569 transitions, 7544 flow [2024-06-21 16:06:31,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 569 transitions, 7299 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-21 16:06:31,895 INFO L231 Difference]: Finished difference. Result has 424 places, 550 transitions, 5817 flow [2024-06-21 16:06:31,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5453, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5817, PETRI_PLACES=424, PETRI_TRANSITIONS=550} [2024-06-21 16:06:31,895 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 380 predicate places. [2024-06-21 16:06:31,895 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 550 transitions, 5817 flow [2024-06-21 16:06:31,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:31,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:06:31,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:06:31,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-21 16:06:31,896 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:06:31,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:06:31,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1963059100, now seen corresponding path program 14 times [2024-06-21 16:06:31,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:06:31,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553777940] [2024-06-21 16:06:31,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:06:31,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:06:31,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:06:31,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:06:31,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:06:31,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553777940] [2024-06-21 16:06:31,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553777940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:06:31,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:06:31,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:06:31,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780913073] [2024-06-21 16:06:31,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:06:31,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:06:31,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:06:31,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:06:31,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:06:32,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:06:32,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 550 transitions, 5817 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:32,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:06:32,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:06:32,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:06:33,228 INFO L124 PetriNetUnfolderBase]: 3121/5440 cut-off events. [2024-06-21 16:06:33,228 INFO L125 PetriNetUnfolderBase]: For 1100557/1100557 co-relation queries the response was YES. [2024-06-21 16:06:33,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41100 conditions, 5440 events. 3121/5440 cut-off events. For 1100557/1100557 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 38172 event pairs, 613 based on Foata normal form. 1/5433 useless extension candidates. Maximal degree in co-relation 40897. Up to 4529 conditions per place. [2024-06-21 16:06:33,310 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 401 selfloop transitions, 159 changer transitions 0/570 dead transitions. [2024-06-21 16:06:33,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 570 transitions, 7723 flow [2024-06-21 16:06:33,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:06:33,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:06:33,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-21 16:06:33,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5988372093023255 [2024-06-21 16:06:33,311 INFO L175 Difference]: Start difference. First operand has 424 places, 550 transitions, 5817 flow. Second operand 8 states and 206 transitions. [2024-06-21 16:06:33,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 570 transitions, 7723 flow [2024-06-21 16:06:43,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 570 transitions, 7464 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 16:06:43,705 INFO L231 Difference]: Finished difference. Result has 428 places, 556 transitions, 5992 flow [2024-06-21 16:06:43,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5564, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5992, PETRI_PLACES=428, PETRI_TRANSITIONS=556} [2024-06-21 16:06:43,705 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 384 predicate places. [2024-06-21 16:06:43,705 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 556 transitions, 5992 flow [2024-06-21 16:06:43,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:43,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:06:43,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:06:43,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-21 16:06:43,706 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:06:43,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:06:43,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1829935588, now seen corresponding path program 15 times [2024-06-21 16:06:43,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:06:43,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495976122] [2024-06-21 16:06:43,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:06:43,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:06:43,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:06:43,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:06:43,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:06:43,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495976122] [2024-06-21 16:06:43,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495976122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:06:43,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:06:43,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:06:43,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738989975] [2024-06-21 16:06:43,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:06:43,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:06:43,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:06:43,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:06:43,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:06:43,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:06:43,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 556 transitions, 5992 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:43,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:06:43,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:06:43,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:06:44,990 INFO L124 PetriNetUnfolderBase]: 3126/5447 cut-off events. [2024-06-21 16:06:44,990 INFO L125 PetriNetUnfolderBase]: For 1115174/1115174 co-relation queries the response was YES. [2024-06-21 16:06:45,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41273 conditions, 5447 events. 3126/5447 cut-off events. For 1115174/1115174 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 38226 event pairs, 616 based on Foata normal form. 1/5440 useless extension candidates. Maximal degree in co-relation 41069. Up to 4535 conditions per place. [2024-06-21 16:06:45,075 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 400 selfloop transitions, 162 changer transitions 0/572 dead transitions. [2024-06-21 16:06:45,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 572 transitions, 7535 flow [2024-06-21 16:06:45,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:06:45,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:06:45,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 16:06:45,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959302325581395 [2024-06-21 16:06:45,076 INFO L175 Difference]: Start difference. First operand has 428 places, 556 transitions, 5992 flow. Second operand 8 states and 205 transitions. [2024-06-21 16:06:45,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 572 transitions, 7535 flow [2024-06-21 16:06:51,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 572 transitions, 7275 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 16:06:51,961 INFO L231 Difference]: Finished difference. Result has 432 places, 559 transitions, 6127 flow [2024-06-21 16:06:51,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5751, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6127, PETRI_PLACES=432, PETRI_TRANSITIONS=559} [2024-06-21 16:06:51,961 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 388 predicate places. [2024-06-21 16:06:51,962 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 559 transitions, 6127 flow [2024-06-21 16:06:51,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:51,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:06:51,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:06:51,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-21 16:06:51,962 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:06:51,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:06:51,962 INFO L85 PathProgramCache]: Analyzing trace with hash 769160464, now seen corresponding path program 16 times [2024-06-21 16:06:51,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:06:51,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703601919] [2024-06-21 16:06:51,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:06:51,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:06:51,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:06:52,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:06:52,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:06:52,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703601919] [2024-06-21 16:06:52,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703601919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:06:52,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:06:52,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:06:52,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761953150] [2024-06-21 16:06:52,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:06:52,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:06:52,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:06:52,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:06:52,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:06:52,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:06:52,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 559 transitions, 6127 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:52,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:06:52,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:06:52,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:06:53,231 INFO L124 PetriNetUnfolderBase]: 3123/5446 cut-off events. [2024-06-21 16:06:53,231 INFO L125 PetriNetUnfolderBase]: For 1116105/1116105 co-relation queries the response was YES. [2024-06-21 16:06:53,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41153 conditions, 5446 events. 3123/5446 cut-off events. For 1116105/1116105 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 38247 event pairs, 612 based on Foata normal form. 1/5439 useless extension candidates. Maximal degree in co-relation 40947. Up to 4532 conditions per place. [2024-06-21 16:06:53,315 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 400 selfloop transitions, 163 changer transitions 0/573 dead transitions. [2024-06-21 16:06:53,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 573 transitions, 7937 flow [2024-06-21 16:06:53,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:06:53,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:06:53,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 16:06:53,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959302325581395 [2024-06-21 16:06:53,317 INFO L175 Difference]: Start difference. First operand has 432 places, 559 transitions, 6127 flow. Second operand 8 states and 205 transitions. [2024-06-21 16:06:53,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 573 transitions, 7937 flow [2024-06-21 16:07:00,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 573 transitions, 7697 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 16:07:00,744 INFO L231 Difference]: Finished difference. Result has 435 places, 559 transitions, 6219 flow [2024-06-21 16:07:00,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5887, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6219, PETRI_PLACES=435, PETRI_TRANSITIONS=559} [2024-06-21 16:07:00,744 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 391 predicate places. [2024-06-21 16:07:00,744 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 559 transitions, 6219 flow [2024-06-21 16:07:00,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:00,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:00,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:00,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-21 16:07:00,745 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:07:00,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:00,745 INFO L85 PathProgramCache]: Analyzing trace with hash -51768300, now seen corresponding path program 17 times [2024-06-21 16:07:00,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:00,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490009195] [2024-06-21 16:07:00,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:00,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:00,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:00,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:00,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:00,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490009195] [2024-06-21 16:07:00,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490009195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:00,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:00,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:07:00,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578523142] [2024-06-21 16:07:00,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:00,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:07:00,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:00,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:07:00,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:07:00,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:07:00,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 559 transitions, 6219 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:00,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:00,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:07:00,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:02,078 INFO L124 PetriNetUnfolderBase]: 3120/5439 cut-off events. [2024-06-21 16:07:02,079 INFO L125 PetriNetUnfolderBase]: For 1117658/1117658 co-relation queries the response was YES. [2024-06-21 16:07:02,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41056 conditions, 5439 events. 3120/5439 cut-off events. For 1117658/1117658 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 38246 event pairs, 616 based on Foata normal form. 1/5432 useless extension candidates. Maximal degree in co-relation 40848. Up to 4529 conditions per place. [2024-06-21 16:07:02,169 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 399 selfloop transitions, 163 changer transitions 0/572 dead transitions. [2024-06-21 16:07:02,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 572 transitions, 7701 flow [2024-06-21 16:07:02,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:07:02,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:07:02,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-21 16:07:02,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-21 16:07:02,170 INFO L175 Difference]: Start difference. First operand has 435 places, 559 transitions, 6219 flow. Second operand 8 states and 204 transitions. [2024-06-21 16:07:02,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 572 transitions, 7701 flow [2024-06-21 16:07:09,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 572 transitions, 7148 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-21 16:07:09,579 INFO L231 Difference]: Finished difference. Result has 434 places, 559 transitions, 5998 flow [2024-06-21 16:07:09,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5666, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5998, PETRI_PLACES=434, PETRI_TRANSITIONS=559} [2024-06-21 16:07:09,579 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 390 predicate places. [2024-06-21 16:07:09,579 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 559 transitions, 5998 flow [2024-06-21 16:07:09,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:09,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:09,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:09,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-21 16:07:09,580 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:07:09,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:09,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1052349744, now seen corresponding path program 18 times [2024-06-21 16:07:09,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:09,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598161918] [2024-06-21 16:07:09,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:09,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:09,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:09,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:09,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:09,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598161918] [2024-06-21 16:07:09,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598161918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:09,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:09,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:07:09,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862134090] [2024-06-21 16:07:09,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:09,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:07:09,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:09,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:07:09,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:07:09,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:07:09,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 559 transitions, 5998 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:09,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:09,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:07:09,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:10,854 INFO L124 PetriNetUnfolderBase]: 3117/5444 cut-off events. [2024-06-21 16:07:10,854 INFO L125 PetriNetUnfolderBase]: For 1114121/1114121 co-relation queries the response was YES. [2024-06-21 16:07:10,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40781 conditions, 5444 events. 3117/5444 cut-off events. For 1114121/1114121 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 38326 event pairs, 602 based on Foata normal form. 1/5437 useless extension candidates. Maximal degree in co-relation 40573. Up to 4526 conditions per place. [2024-06-21 16:07:10,947 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 397 selfloop transitions, 168 changer transitions 0/575 dead transitions. [2024-06-21 16:07:10,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 575 transitions, 7824 flow [2024-06-21 16:07:10,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:07:10,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:07:10,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 250 transitions. [2024-06-21 16:07:10,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-21 16:07:10,950 INFO L175 Difference]: Start difference. First operand has 434 places, 559 transitions, 5998 flow. Second operand 10 states and 250 transitions. [2024-06-21 16:07:10,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 575 transitions, 7824 flow [2024-06-21 16:07:18,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 575 transitions, 7370 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 16:07:18,642 INFO L231 Difference]: Finished difference. Result has 436 places, 559 transitions, 5886 flow [2024-06-21 16:07:18,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5544, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5886, PETRI_PLACES=436, PETRI_TRANSITIONS=559} [2024-06-21 16:07:18,643 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 392 predicate places. [2024-06-21 16:07:18,643 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 559 transitions, 5886 flow [2024-06-21 16:07:18,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:18,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:18,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:18,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-21 16:07:18,643 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:07:18,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:18,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1822462996, now seen corresponding path program 19 times [2024-06-21 16:07:18,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:18,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816311554] [2024-06-21 16:07:18,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:18,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:18,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:18,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:18,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:18,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816311554] [2024-06-21 16:07:18,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816311554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:18,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:18,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:07:18,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672736415] [2024-06-21 16:07:18,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:18,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:07:18,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:18,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:07:18,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:07:18,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:07:18,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 559 transitions, 5886 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:18,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:18,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:07:18,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:19,905 INFO L124 PetriNetUnfolderBase]: 3114/5431 cut-off events. [2024-06-21 16:07:19,905 INFO L125 PetriNetUnfolderBase]: For 1112098/1112098 co-relation queries the response was YES. [2024-06-21 16:07:19,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40631 conditions, 5431 events. 3114/5431 cut-off events. For 1112098/1112098 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 38166 event pairs, 616 based on Foata normal form. 1/5424 useless extension candidates. Maximal degree in co-relation 40423. Up to 4523 conditions per place. [2024-06-21 16:07:19,990 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 395 selfloop transitions, 167 changer transitions 0/572 dead transitions. [2024-06-21 16:07:19,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 572 transitions, 7372 flow [2024-06-21 16:07:19,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:07:19,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:07:19,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 16:07:19,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5901162790697675 [2024-06-21 16:07:19,991 INFO L175 Difference]: Start difference. First operand has 436 places, 559 transitions, 5886 flow. Second operand 8 states and 203 transitions. [2024-06-21 16:07:19,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 572 transitions, 7372 flow [2024-06-21 16:07:27,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 572 transitions, 6634 flow, removed 15 selfloop flow, removed 12 redundant places. [2024-06-21 16:07:27,452 INFO L231 Difference]: Finished difference. Result has 432 places, 559 transitions, 5488 flow [2024-06-21 16:07:27,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5148, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5488, PETRI_PLACES=432, PETRI_TRANSITIONS=559} [2024-06-21 16:07:27,453 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 388 predicate places. [2024-06-21 16:07:27,453 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 559 transitions, 5488 flow [2024-06-21 16:07:27,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:27,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:27,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:27,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-21 16:07:27,453 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:07:27,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:27,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1460001140, now seen corresponding path program 20 times [2024-06-21 16:07:27,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:27,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579300586] [2024-06-21 16:07:27,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:27,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:27,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:27,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:27,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:27,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579300586] [2024-06-21 16:07:27,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579300586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:27,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:27,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:07:27,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675976215] [2024-06-21 16:07:27,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:27,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:07:27,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:27,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:07:27,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:07:27,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:07:27,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 559 transitions, 5488 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:27,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:27,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:07:27,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:28,684 INFO L124 PetriNetUnfolderBase]: 3111/5436 cut-off events. [2024-06-21 16:07:28,684 INFO L125 PetriNetUnfolderBase]: For 1107610/1107610 co-relation queries the response was YES. [2024-06-21 16:07:28,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40339 conditions, 5436 events. 3111/5436 cut-off events. For 1107610/1107610 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 38256 event pairs, 602 based on Foata normal form. 1/5429 useless extension candidates. Maximal degree in co-relation 40131. Up to 4520 conditions per place. [2024-06-21 16:07:28,775 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 394 selfloop transitions, 167 changer transitions 0/571 dead transitions. [2024-06-21 16:07:28,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 571 transitions, 6638 flow [2024-06-21 16:07:28,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:07:28,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:07:28,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 16:07:28,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5872093023255814 [2024-06-21 16:07:28,776 INFO L175 Difference]: Start difference. First operand has 432 places, 559 transitions, 5488 flow. Second operand 8 states and 202 transitions. [2024-06-21 16:07:28,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 571 transitions, 6638 flow [2024-06-21 16:07:36,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 571 transitions, 6272 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 16:07:36,579 INFO L231 Difference]: Finished difference. Result has 432 places, 559 transitions, 5462 flow [2024-06-21 16:07:36,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5122, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5462, PETRI_PLACES=432, PETRI_TRANSITIONS=559} [2024-06-21 16:07:36,579 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 388 predicate places. [2024-06-21 16:07:36,580 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 559 transitions, 5462 flow [2024-06-21 16:07:36,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:36,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:36,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:36,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-21 16:07:36,580 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:07:36,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:36,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1195644972, now seen corresponding path program 5 times [2024-06-21 16:07:36,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:36,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932074394] [2024-06-21 16:07:36,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:36,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:36,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:36,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932074394] [2024-06-21 16:07:36,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932074394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:36,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:36,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:07:36,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45303609] [2024-06-21 16:07:36,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:36,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:07:36,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:36,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:07:36,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:07:36,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:07:36,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 559 transitions, 5462 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:36,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:36,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:07:36,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:37,865 INFO L124 PetriNetUnfolderBase]: 3119/5466 cut-off events. [2024-06-21 16:07:37,865 INFO L125 PetriNetUnfolderBase]: For 1136238/1136238 co-relation queries the response was YES. [2024-06-21 16:07:37,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40603 conditions, 5466 events. 3119/5466 cut-off events. For 1136238/1136238 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 38547 event pairs, 567 based on Foata normal form. 2/5458 useless extension candidates. Maximal degree in co-relation 40394. Up to 4697 conditions per place. [2024-06-21 16:07:37,963 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 503 selfloop transitions, 66 changer transitions 0/579 dead transitions. [2024-06-21 16:07:37,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 579 transitions, 6730 flow [2024-06-21 16:07:37,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:07:37,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:07:37,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 16:07:37,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-21 16:07:37,964 INFO L175 Difference]: Start difference. First operand has 432 places, 559 transitions, 5462 flow. Second operand 7 states and 182 transitions. [2024-06-21 16:07:37,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 579 transitions, 6730 flow [2024-06-21 16:07:46,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 579 transitions, 6377 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 16:07:46,025 INFO L231 Difference]: Finished difference. Result has 431 places, 561 transitions, 5336 flow [2024-06-21 16:07:46,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5109, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5336, PETRI_PLACES=431, PETRI_TRANSITIONS=561} [2024-06-21 16:07:46,025 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 387 predicate places. [2024-06-21 16:07:46,026 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 561 transitions, 5336 flow [2024-06-21 16:07:46,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:46,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:46,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:46,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-21 16:07:46,026 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:07:46,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:46,027 INFO L85 PathProgramCache]: Analyzing trace with hash -558294452, now seen corresponding path program 6 times [2024-06-21 16:07:46,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:46,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941438172] [2024-06-21 16:07:46,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:46,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:46,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:46,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:46,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:46,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941438172] [2024-06-21 16:07:46,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941438172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:46,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:46,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:07:46,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919658525] [2024-06-21 16:07:46,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:46,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:07:46,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:46,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:07:46,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:07:46,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:07:46,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 561 transitions, 5336 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:46,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:46,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:07:46,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:47,280 INFO L124 PetriNetUnfolderBase]: 3127/5476 cut-off events. [2024-06-21 16:07:47,281 INFO L125 PetriNetUnfolderBase]: For 1151943/1151943 co-relation queries the response was YES. [2024-06-21 16:07:47,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40701 conditions, 5476 events. 3127/5476 cut-off events. For 1151943/1151943 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 38617 event pairs, 563 based on Foata normal form. 2/5468 useless extension candidates. Maximal degree in co-relation 40491. Up to 4683 conditions per place. [2024-06-21 16:07:47,371 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 501 selfloop transitions, 73 changer transitions 0/584 dead transitions. [2024-06-21 16:07:47,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 584 transitions, 6682 flow [2024-06-21 16:07:47,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:07:47,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:07:47,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 16:07:47,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6079734219269103 [2024-06-21 16:07:47,372 INFO L175 Difference]: Start difference. First operand has 431 places, 561 transitions, 5336 flow. Second operand 7 states and 183 transitions. [2024-06-21 16:07:47,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 584 transitions, 6682 flow [2024-06-21 16:07:55,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 584 transitions, 6471 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-21 16:07:55,715 INFO L231 Difference]: Finished difference. Result has 434 places, 565 transitions, 5446 flow [2024-06-21 16:07:55,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5125, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5446, PETRI_PLACES=434, PETRI_TRANSITIONS=565} [2024-06-21 16:07:55,716 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 390 predicate places. [2024-06-21 16:07:55,716 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 565 transitions, 5446 flow [2024-06-21 16:07:55,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:55,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:55,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:55,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-21 16:07:55,716 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:07:55,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:55,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1788809994, now seen corresponding path program 7 times [2024-06-21 16:07:55,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:55,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234245359] [2024-06-21 16:07:55,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:55,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:55,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:55,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:55,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:55,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234245359] [2024-06-21 16:07:55,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234245359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:55,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:55,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:07:55,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157017737] [2024-06-21 16:07:55,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:55,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:07:55,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:55,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:07:55,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:07:55,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:07:55,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 565 transitions, 5446 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:55,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:55,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:07:55,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:57,025 INFO L124 PetriNetUnfolderBase]: 3135/5487 cut-off events. [2024-06-21 16:07:57,025 INFO L125 PetriNetUnfolderBase]: For 1166813/1166813 co-relation queries the response was YES. [2024-06-21 16:07:57,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40971 conditions, 5487 events. 3135/5487 cut-off events. For 1166813/1166813 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 38733 event pairs, 581 based on Foata normal form. 2/5484 useless extension candidates. Maximal degree in co-relation 40759. Up to 4721 conditions per place. [2024-06-21 16:07:57,117 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 505 selfloop transitions, 65 changer transitions 0/580 dead transitions. [2024-06-21 16:07:57,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 580 transitions, 6710 flow [2024-06-21 16:07:57,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:07:57,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:07:57,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 16:07:57,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5784883720930233 [2024-06-21 16:07:57,118 INFO L175 Difference]: Start difference. First operand has 434 places, 565 transitions, 5446 flow. Second operand 8 states and 199 transitions. [2024-06-21 16:07:57,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 580 transitions, 6710 flow [2024-06-21 16:08:05,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 580 transitions, 6496 flow, removed 68 selfloop flow, removed 3 redundant places. [2024-06-21 16:08:05,275 INFO L231 Difference]: Finished difference. Result has 439 places, 567 transitions, 5465 flow [2024-06-21 16:08:05,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5232, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5465, PETRI_PLACES=439, PETRI_TRANSITIONS=567} [2024-06-21 16:08:05,276 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 395 predicate places. [2024-06-21 16:08:05,276 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 567 transitions, 5465 flow [2024-06-21 16:08:05,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:05,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:05,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:05,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-21 16:08:05,277 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:08:05,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:05,277 INFO L85 PathProgramCache]: Analyzing trace with hash -764144920, now seen corresponding path program 8 times [2024-06-21 16:08:05,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:05,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197404300] [2024-06-21 16:08:05,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:05,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:05,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:05,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:05,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:05,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197404300] [2024-06-21 16:08:05,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197404300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:05,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:05,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:08:05,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956073111] [2024-06-21 16:08:05,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:05,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:08:05,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:05,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:08:05,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:08:05,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:08:05,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 567 transitions, 5465 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:05,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:05,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:08:05,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:06,606 INFO L124 PetriNetUnfolderBase]: 3143/5503 cut-off events. [2024-06-21 16:08:06,606 INFO L125 PetriNetUnfolderBase]: For 1180084/1180084 co-relation queries the response was YES. [2024-06-21 16:08:06,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41218 conditions, 5503 events. 3143/5503 cut-off events. For 1180084/1180084 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 38921 event pairs, 581 based on Foata normal form. 2/5500 useless extension candidates. Maximal degree in co-relation 41004. Up to 4713 conditions per place. [2024-06-21 16:08:06,706 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 504 selfloop transitions, 70 changer transitions 0/584 dead transitions. [2024-06-21 16:08:06,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 584 transitions, 6745 flow [2024-06-21 16:08:06,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:08:06,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:08:06,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-21 16:08:06,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5710594315245479 [2024-06-21 16:08:06,708 INFO L175 Difference]: Start difference. First operand has 439 places, 567 transitions, 5465 flow. Second operand 9 states and 221 transitions. [2024-06-21 16:08:06,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 584 transitions, 6745 flow [2024-06-21 16:08:16,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 584 transitions, 6528 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-21 16:08:16,335 INFO L231 Difference]: Finished difference. Result has 442 places, 569 transitions, 5495 flow [2024-06-21 16:08:16,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5248, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5495, PETRI_PLACES=442, PETRI_TRANSITIONS=569} [2024-06-21 16:08:16,336 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 398 predicate places. [2024-06-21 16:08:16,336 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 569 transitions, 5495 flow [2024-06-21 16:08:16,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:16,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:16,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:16,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-21 16:08:16,337 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:08:16,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:16,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1831042804, now seen corresponding path program 9 times [2024-06-21 16:08:16,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:16,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021487313] [2024-06-21 16:08:16,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:16,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:16,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:16,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:16,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:16,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021487313] [2024-06-21 16:08:16,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021487313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:16,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:16,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:08:16,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180841404] [2024-06-21 16:08:16,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:16,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:08:16,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:16,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:08:16,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:08:16,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:08:16,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 569 transitions, 5495 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:16,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:16,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:08:16,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:17,639 INFO L124 PetriNetUnfolderBase]: 3164/5541 cut-off events. [2024-06-21 16:08:17,639 INFO L125 PetriNetUnfolderBase]: For 1227253/1227253 co-relation queries the response was YES. [2024-06-21 16:08:17,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42121 conditions, 5541 events. 3164/5541 cut-off events. For 1227253/1227253 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 39192 event pairs, 580 based on Foata normal form. 2/5538 useless extension candidates. Maximal degree in co-relation 41906. Up to 4739 conditions per place. [2024-06-21 16:08:17,737 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 508 selfloop transitions, 72 changer transitions 0/590 dead transitions. [2024-06-21 16:08:17,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 590 transitions, 7241 flow [2024-06-21 16:08:17,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:08:17,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:08:17,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 243 transitions. [2024-06-21 16:08:17,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5651162790697675 [2024-06-21 16:08:17,741 INFO L175 Difference]: Start difference. First operand has 442 places, 569 transitions, 5495 flow. Second operand 10 states and 243 transitions. [2024-06-21 16:08:17,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 590 transitions, 7241 flow [2024-06-21 16:08:26,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 590 transitions, 7010 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-21 16:08:26,111 INFO L231 Difference]: Finished difference. Result has 445 places, 573 transitions, 5621 flow [2024-06-21 16:08:26,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5264, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5621, PETRI_PLACES=445, PETRI_TRANSITIONS=573} [2024-06-21 16:08:26,112 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 401 predicate places. [2024-06-21 16:08:26,112 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 573 transitions, 5621 flow [2024-06-21 16:08:26,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:26,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:26,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:26,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-21 16:08:26,112 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:08:26,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:26,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1813901044, now seen corresponding path program 10 times [2024-06-21 16:08:26,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:26,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626220190] [2024-06-21 16:08:26,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:26,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:26,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:26,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:26,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:26,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626220190] [2024-06-21 16:08:26,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626220190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:26,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:26,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:08:26,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808573588] [2024-06-21 16:08:26,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:26,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:08:26,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:26,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:08:26,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:08:26,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:08:26,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 573 transitions, 5621 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:26,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:26,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:08:26,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:27,392 INFO L124 PetriNetUnfolderBase]: 3172/5553 cut-off events. [2024-06-21 16:08:27,393 INFO L125 PetriNetUnfolderBase]: For 1242770/1242770 co-relation queries the response was YES. [2024-06-21 16:08:27,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42331 conditions, 5553 events. 3172/5553 cut-off events. For 1242770/1242770 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 39332 event pairs, 582 based on Foata normal form. 2/5550 useless extension candidates. Maximal degree in co-relation 42115. Up to 4776 conditions per place. [2024-06-21 16:08:27,494 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 513 selfloop transitions, 67 changer transitions 0/590 dead transitions. [2024-06-21 16:08:27,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 590 transitions, 6921 flow [2024-06-21 16:08:27,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:08:27,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:08:27,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-21 16:08:27,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5604651162790698 [2024-06-21 16:08:27,496 INFO L175 Difference]: Start difference. First operand has 445 places, 573 transitions, 5621 flow. Second operand 10 states and 241 transitions. [2024-06-21 16:08:27,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 590 transitions, 6921 flow [2024-06-21 16:08:36,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 590 transitions, 6685 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-21 16:08:36,219 INFO L231 Difference]: Finished difference. Result has 449 places, 575 transitions, 5634 flow [2024-06-21 16:08:36,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5413, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5634, PETRI_PLACES=449, PETRI_TRANSITIONS=575} [2024-06-21 16:08:36,220 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 405 predicate places. [2024-06-21 16:08:36,220 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 575 transitions, 5634 flow [2024-06-21 16:08:36,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:36,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:36,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:36,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-21 16:08:36,221 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:08:36,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:36,221 INFO L85 PathProgramCache]: Analyzing trace with hash -378976576, now seen corresponding path program 11 times [2024-06-21 16:08:36,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:36,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516935297] [2024-06-21 16:08:36,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:36,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:36,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:36,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:36,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516935297] [2024-06-21 16:08:36,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516935297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:36,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:36,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:08:36,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523333258] [2024-06-21 16:08:36,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:36,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:08:36,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:36,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:08:36,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:08:36,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:08:36,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 575 transitions, 5634 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:36,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:36,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:08:36,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:37,500 INFO L124 PetriNetUnfolderBase]: 3167/5546 cut-off events. [2024-06-21 16:08:37,501 INFO L125 PetriNetUnfolderBase]: For 1221840/1221840 co-relation queries the response was YES. [2024-06-21 16:08:37,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41807 conditions, 5546 events. 3167/5546 cut-off events. For 1221840/1221840 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 39285 event pairs, 581 based on Foata normal form. 2/5543 useless extension candidates. Maximal degree in co-relation 41589. Up to 4769 conditions per place. [2024-06-21 16:08:37,603 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 512 selfloop transitions, 66 changer transitions 0/588 dead transitions. [2024-06-21 16:08:37,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 588 transitions, 6820 flow [2024-06-21 16:08:37,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:08:37,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:08:37,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 16:08:37,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5755813953488372 [2024-06-21 16:08:37,604 INFO L175 Difference]: Start difference. First operand has 449 places, 575 transitions, 5634 flow. Second operand 8 states and 198 transitions. [2024-06-21 16:08:37,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 588 transitions, 6820 flow [2024-06-21 16:08:46,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 588 transitions, 6555 flow, removed 67 selfloop flow, removed 8 redundant places. [2024-06-21 16:08:46,372 INFO L231 Difference]: Finished difference. Result has 449 places, 575 transitions, 5506 flow [2024-06-21 16:08:46,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5369, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5506, PETRI_PLACES=449, PETRI_TRANSITIONS=575} [2024-06-21 16:08:46,373 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 405 predicate places. [2024-06-21 16:08:46,373 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 575 transitions, 5506 flow [2024-06-21 16:08:46,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:46,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:46,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:46,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-21 16:08:46,374 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:08:46,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:46,374 INFO L85 PathProgramCache]: Analyzing trace with hash -286912780, now seen corresponding path program 12 times [2024-06-21 16:08:46,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:46,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336384974] [2024-06-21 16:08:46,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:46,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:46,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:46,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:46,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336384974] [2024-06-21 16:08:46,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336384974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:46,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:46,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:08:46,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862030162] [2024-06-21 16:08:46,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:46,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:08:46,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:46,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:08:46,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:08:46,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:08:46,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 575 transitions, 5506 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:46,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:46,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:08:46,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:47,585 INFO L124 PetriNetUnfolderBase]: 3175/5560 cut-off events. [2024-06-21 16:08:47,585 INFO L125 PetriNetUnfolderBase]: For 1235097/1235097 co-relation queries the response was YES. [2024-06-21 16:08:47,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41853 conditions, 5560 events. 3175/5560 cut-off events. For 1235097/1235097 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 39362 event pairs, 579 based on Foata normal form. 2/5557 useless extension candidates. Maximal degree in co-relation 41634. Up to 4749 conditions per place. [2024-06-21 16:08:47,678 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 508 selfloop transitions, 75 changer transitions 0/593 dead transitions. [2024-06-21 16:08:47,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 593 transitions, 6880 flow [2024-06-21 16:08:47,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:08:47,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:08:47,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 16:08:47,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5784883720930233 [2024-06-21 16:08:47,680 INFO L175 Difference]: Start difference. First operand has 449 places, 575 transitions, 5506 flow. Second operand 8 states and 199 transitions. [2024-06-21 16:08:47,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 593 transitions, 6880 flow [2024-06-21 16:08:55,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 593 transitions, 6731 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 16:08:55,121 INFO L231 Difference]: Finished difference. Result has 451 places, 579 transitions, 5709 flow [2024-06-21 16:08:55,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5357, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5709, PETRI_PLACES=451, PETRI_TRANSITIONS=579} [2024-06-21 16:08:55,121 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 407 predicate places. [2024-06-21 16:08:55,121 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 579 transitions, 5709 flow [2024-06-21 16:08:55,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:55,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:55,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:55,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-21 16:08:55,122 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:08:55,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:55,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1800623086, now seen corresponding path program 13 times [2024-06-21 16:08:55,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:55,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874756079] [2024-06-21 16:08:55,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:55,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:55,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:55,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:55,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:55,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874756079] [2024-06-21 16:08:55,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874756079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:55,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:55,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:08:55,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806217985] [2024-06-21 16:08:55,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:55,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:08:55,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:55,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:08:55,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:08:55,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:08:55,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 579 transitions, 5709 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:55,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:55,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:08:55,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:56,447 INFO L124 PetriNetUnfolderBase]: 3183/5580 cut-off events. [2024-06-21 16:08:56,447 INFO L125 PetriNetUnfolderBase]: For 1253199/1253199 co-relation queries the response was YES. [2024-06-21 16:08:56,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42312 conditions, 5580 events. 3183/5580 cut-off events. For 1253199/1253199 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 39574 event pairs, 562 based on Foata normal form. 2/5577 useless extension candidates. Maximal degree in co-relation 42091. Up to 4646 conditions per place. [2024-06-21 16:08:56,547 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 494 selfloop transitions, 98 changer transitions 0/602 dead transitions. [2024-06-21 16:08:56,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 602 transitions, 7573 flow [2024-06-21 16:08:56,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:08:56,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:08:56,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-21 16:08:56,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762273901808785 [2024-06-21 16:08:56,561 INFO L175 Difference]: Start difference. First operand has 451 places, 579 transitions, 5709 flow. Second operand 9 states and 223 transitions. [2024-06-21 16:08:56,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 602 transitions, 7573 flow [2024-06-21 16:09:06,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 602 transitions, 7335 flow, removed 80 selfloop flow, removed 4 redundant places. [2024-06-21 16:09:06,263 INFO L231 Difference]: Finished difference. Result has 457 places, 585 transitions, 6003 flow [2024-06-21 16:09:06,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5471, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6003, PETRI_PLACES=457, PETRI_TRANSITIONS=585} [2024-06-21 16:09:06,263 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 413 predicate places. [2024-06-21 16:09:06,264 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 585 transitions, 6003 flow [2024-06-21 16:09:06,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:06,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:06,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:06,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-21 16:09:06,264 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:06,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:06,264 INFO L85 PathProgramCache]: Analyzing trace with hash 469170920, now seen corresponding path program 14 times [2024-06-21 16:09:06,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:06,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367524965] [2024-06-21 16:09:06,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:06,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:06,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:06,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367524965] [2024-06-21 16:09:06,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367524965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:06,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:06,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:09:06,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293459030] [2024-06-21 16:09:06,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:06,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:09:06,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:06,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:09:06,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:09:06,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:09:06,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 585 transitions, 6003 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:06,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:06,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:09:06,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:07,829 INFO L124 PetriNetUnfolderBase]: 3178/5573 cut-off events. [2024-06-21 16:09:07,829 INFO L125 PetriNetUnfolderBase]: For 1232968/1232968 co-relation queries the response was YES. [2024-06-21 16:09:08,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42089 conditions, 5573 events. 3178/5573 cut-off events. For 1232968/1232968 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 39611 event pairs, 560 based on Foata normal form. 2/5570 useless extension candidates. Maximal degree in co-relation 41865. Up to 4642 conditions per place. [2024-06-21 16:09:08,062 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 491 selfloop transitions, 100 changer transitions 0/601 dead transitions. [2024-06-21 16:09:08,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 601 transitions, 7221 flow [2024-06-21 16:09:08,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:09:08,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:09:08,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-21 16:09:08,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5736434108527132 [2024-06-21 16:09:08,063 INFO L175 Difference]: Start difference. First operand has 457 places, 585 transitions, 6003 flow. Second operand 9 states and 222 transitions. [2024-06-21 16:09:08,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 601 transitions, 7221 flow [2024-06-21 16:09:14,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 601 transitions, 6887 flow, removed 128 selfloop flow, removed 4 redundant places. [2024-06-21 16:09:14,756 INFO L231 Difference]: Finished difference. Result has 462 places, 585 transitions, 5874 flow [2024-06-21 16:09:14,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5669, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5874, PETRI_PLACES=462, PETRI_TRANSITIONS=585} [2024-06-21 16:09:14,757 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 418 predicate places. [2024-06-21 16:09:14,758 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 585 transitions, 5874 flow [2024-06-21 16:09:14,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:14,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:14,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:14,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-21 16:09:14,758 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:14,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:14,759 INFO L85 PathProgramCache]: Analyzing trace with hash 211963320, now seen corresponding path program 1 times [2024-06-21 16:09:14,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:14,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510816590] [2024-06-21 16:09:14,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:14,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:14,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:14,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510816590] [2024-06-21 16:09:14,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510816590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:14,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:14,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:09:14,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631627918] [2024-06-21 16:09:14,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:14,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:09:14,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:14,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:09:14,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:09:14,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:09:14,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 585 transitions, 5874 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:14,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:14,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:09:14,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:16,646 INFO L124 PetriNetUnfolderBase]: 3310/5804 cut-off events. [2024-06-21 16:09:16,647 INFO L125 PetriNetUnfolderBase]: For 1664971/1664971 co-relation queries the response was YES. [2024-06-21 16:09:16,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46968 conditions, 5804 events. 3310/5804 cut-off events. For 1664971/1664971 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 41348 event pairs, 529 based on Foata normal form. 12/5815 useless extension candidates. Maximal degree in co-relation 46742. Up to 4755 conditions per place. [2024-06-21 16:09:16,742 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 578 selfloop transitions, 35 changer transitions 0/623 dead transitions. [2024-06-21 16:09:16,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 623 transitions, 7754 flow [2024-06-21 16:09:16,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:09:16,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:09:16,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-21 16:09:16,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-21 16:09:16,743 INFO L175 Difference]: Start difference. First operand has 462 places, 585 transitions, 5874 flow. Second operand 9 states and 234 transitions. [2024-06-21 16:09:16,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 623 transitions, 7754 flow [2024-06-21 16:09:26,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 623 transitions, 7428 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 16:09:26,612 INFO L231 Difference]: Finished difference. Result has 462 places, 588 transitions, 5781 flow [2024-06-21 16:09:26,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5548, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5781, PETRI_PLACES=462, PETRI_TRANSITIONS=588} [2024-06-21 16:09:26,613 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 418 predicate places. [2024-06-21 16:09:26,613 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 588 transitions, 5781 flow [2024-06-21 16:09:26,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:26,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:26,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:26,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-21 16:09:26,614 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:26,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:26,614 INFO L85 PathProgramCache]: Analyzing trace with hash 2138046206, now seen corresponding path program 2 times [2024-06-21 16:09:26,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:26,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585080913] [2024-06-21 16:09:26,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:26,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:26,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:26,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:26,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:26,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585080913] [2024-06-21 16:09:26,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585080913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:26,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:26,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:09:26,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417515597] [2024-06-21 16:09:26,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:26,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:09:26,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:26,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:09:26,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:09:26,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:09:26,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 588 transitions, 5781 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:26,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:26,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:09:26,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:28,601 INFO L124 PetriNetUnfolderBase]: 3396/5944 cut-off events. [2024-06-21 16:09:28,601 INFO L125 PetriNetUnfolderBase]: For 1827253/1827253 co-relation queries the response was YES. [2024-06-21 16:09:28,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49652 conditions, 5944 events. 3396/5944 cut-off events. For 1827253/1827253 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 42354 event pairs, 606 based on Foata normal form. 12/5955 useless extension candidates. Maximal degree in co-relation 49427. Up to 5046 conditions per place. [2024-06-21 16:09:28,704 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 579 selfloop transitions, 33 changer transitions 0/622 dead transitions. [2024-06-21 16:09:28,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 622 transitions, 7659 flow [2024-06-21 16:09:28,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:09:28,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:09:28,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-21 16:09:28,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5943152454780362 [2024-06-21 16:09:28,705 INFO L175 Difference]: Start difference. First operand has 462 places, 588 transitions, 5781 flow. Second operand 9 states and 230 transitions. [2024-06-21 16:09:28,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 622 transitions, 7659 flow [2024-06-21 16:09:39,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 622 transitions, 7508 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-21 16:09:39,129 INFO L231 Difference]: Finished difference. Result has 466 places, 592 transitions, 5905 flow [2024-06-21 16:09:39,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5650, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5905, PETRI_PLACES=466, PETRI_TRANSITIONS=592} [2024-06-21 16:09:39,129 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 422 predicate places. [2024-06-21 16:09:39,129 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 592 transitions, 5905 flow [2024-06-21 16:09:39,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:39,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:39,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:39,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-21 16:09:39,130 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:39,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:39,132 INFO L85 PathProgramCache]: Analyzing trace with hash -55362836, now seen corresponding path program 3 times [2024-06-21 16:09:39,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:39,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268983702] [2024-06-21 16:09:39,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:39,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:39,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:39,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:39,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268983702] [2024-06-21 16:09:39,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268983702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:39,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:39,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:09:39,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521227280] [2024-06-21 16:09:39,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:39,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:09:39,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:39,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:09:39,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:09:39,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:09:39,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 592 transitions, 5905 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:39,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:39,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:09:39,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:40,914 INFO L124 PetriNetUnfolderBase]: 3360/5892 cut-off events. [2024-06-21 16:09:40,914 INFO L125 PetriNetUnfolderBase]: For 1640375/1640375 co-relation queries the response was YES. [2024-06-21 16:09:41,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45763 conditions, 5892 events. 3360/5892 cut-off events. For 1640375/1640375 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 42024 event pairs, 602 based on Foata normal form. 16/5907 useless extension candidates. Maximal degree in co-relation 45536. Up to 5090 conditions per place. [2024-06-21 16:09:41,025 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 579 selfloop transitions, 29 changer transitions 0/618 dead transitions. [2024-06-21 16:09:41,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 618 transitions, 7201 flow [2024-06-21 16:09:41,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:09:41,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:09:41,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-21 16:09:41,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5839793281653747 [2024-06-21 16:09:41,027 INFO L175 Difference]: Start difference. First operand has 466 places, 592 transitions, 5905 flow. Second operand 9 states and 226 transitions. [2024-06-21 16:09:41,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 618 transitions, 7201 flow [2024-06-21 16:09:49,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 618 transitions, 7016 flow, removed 76 selfloop flow, removed 5 redundant places. [2024-06-21 16:09:49,081 INFO L231 Difference]: Finished difference. Result has 470 places, 592 transitions, 5784 flow [2024-06-21 16:09:49,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5720, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5784, PETRI_PLACES=470, PETRI_TRANSITIONS=592} [2024-06-21 16:09:49,084 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 426 predicate places. [2024-06-21 16:09:49,084 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 592 transitions, 5784 flow [2024-06-21 16:09:49,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:49,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:49,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:49,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-21 16:09:49,084 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:49,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:49,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1921190932, now seen corresponding path program 4 times [2024-06-21 16:09:49,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:49,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679085280] [2024-06-21 16:09:49,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:49,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:49,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:49,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:49,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679085280] [2024-06-21 16:09:49,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679085280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:49,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:49,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:09:49,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997589513] [2024-06-21 16:09:49,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:49,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:09:49,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:49,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:09:49,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:09:49,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:09:49,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 592 transitions, 5784 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:49,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:49,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:09:49,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:50,739 INFO L124 PetriNetUnfolderBase]: 3416/5975 cut-off events. [2024-06-21 16:09:50,740 INFO L125 PetriNetUnfolderBase]: For 1655658/1655658 co-relation queries the response was YES. [2024-06-21 16:09:50,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45951 conditions, 5975 events. 3416/5975 cut-off events. For 1655658/1655658 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 42658 event pairs, 626 based on Foata normal form. 16/5984 useless extension candidates. Maximal degree in co-relation 45722. Up to 4931 conditions per place. [2024-06-21 16:09:50,946 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 446 selfloop transitions, 157 changer transitions 0/613 dead transitions. [2024-06-21 16:09:50,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 613 transitions, 7154 flow [2024-06-21 16:09:50,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:09:50,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:09:50,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-21 16:09:50,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-21 16:09:50,952 INFO L175 Difference]: Start difference. First operand has 470 places, 592 transitions, 5784 flow. Second operand 8 states and 208 transitions. [2024-06-21 16:09:50,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 613 transitions, 7154 flow [2024-06-21 16:09:59,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 613 transitions, 7088 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 16:09:59,079 INFO L231 Difference]: Finished difference. Result has 470 places, 594 transitions, 6144 flow [2024-06-21 16:09:59,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5718, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6144, PETRI_PLACES=470, PETRI_TRANSITIONS=594} [2024-06-21 16:09:59,079 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 426 predicate places. [2024-06-21 16:09:59,079 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 594 transitions, 6144 flow [2024-06-21 16:09:59,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:59,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:59,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:59,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-21 16:09:59,080 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:59,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:59,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1757627978, now seen corresponding path program 5 times [2024-06-21 16:09:59,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:59,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098521665] [2024-06-21 16:09:59,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:59,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:59,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:59,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:59,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:59,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098521665] [2024-06-21 16:09:59,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098521665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:59,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:59,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:09:59,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087855871] [2024-06-21 16:09:59,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:59,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:09:59,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:59,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:09:59,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:09:59,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:09:59,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 594 transitions, 6144 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:59,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:59,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:09:59,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:00,877 INFO L124 PetriNetUnfolderBase]: 3548/6185 cut-off events. [2024-06-21 16:10:00,878 INFO L125 PetriNetUnfolderBase]: For 1891546/1891546 co-relation queries the response was YES. [2024-06-21 16:10:00,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51705 conditions, 6185 events. 3548/6185 cut-off events. For 1891546/1891546 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 44246 event pairs, 648 based on Foata normal form. 12/6190 useless extension candidates. Maximal degree in co-relation 51475. Up to 4975 conditions per place. [2024-06-21 16:10:00,996 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 448 selfloop transitions, 163 changer transitions 0/621 dead transitions. [2024-06-21 16:10:00,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 621 transitions, 8020 flow [2024-06-21 16:10:00,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:10:00,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:10:00,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-21 16:10:00,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6133720930232558 [2024-06-21 16:10:00,997 INFO L175 Difference]: Start difference. First operand has 470 places, 594 transitions, 6144 flow. Second operand 8 states and 211 transitions. [2024-06-21 16:10:00,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 621 transitions, 8020 flow [2024-06-21 16:10:09,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 621 transitions, 7620 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-21 16:10:09,892 INFO L231 Difference]: Finished difference. Result has 472 places, 598 transitions, 6291 flow [2024-06-21 16:10:09,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5744, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6291, PETRI_PLACES=472, PETRI_TRANSITIONS=598} [2024-06-21 16:10:09,893 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 428 predicate places. [2024-06-21 16:10:09,893 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 598 transitions, 6291 flow [2024-06-21 16:10:09,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:09,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:09,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:09,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-21 16:10:09,894 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:09,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:09,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1934879468, now seen corresponding path program 6 times [2024-06-21 16:10:09,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:09,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185702681] [2024-06-21 16:10:09,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:09,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:09,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:09,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:09,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:09,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185702681] [2024-06-21 16:10:09,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185702681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:09,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:09,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:10:09,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622302231] [2024-06-21 16:10:09,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:09,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:10:09,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:09,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:10:09,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:10:10,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:10:10,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 598 transitions, 6291 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:10,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:10,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:10:10,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:11,742 INFO L124 PetriNetUnfolderBase]: 3512/6135 cut-off events. [2024-06-21 16:10:11,742 INFO L125 PetriNetUnfolderBase]: For 1701424/1701424 co-relation queries the response was YES. [2024-06-21 16:10:11,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47759 conditions, 6135 events. 3512/6135 cut-off events. For 1701424/1701424 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 43997 event pairs, 646 based on Foata normal form. 16/6144 useless extension candidates. Maximal degree in co-relation 47528. Up to 5083 conditions per place. [2024-06-21 16:10:11,850 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 447 selfloop transitions, 160 changer transitions 0/617 dead transitions. [2024-06-21 16:10:11,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 617 transitions, 7567 flow [2024-06-21 16:10:11,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:10:11,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:10:11,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-21 16:10:11,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6017441860465116 [2024-06-21 16:10:11,851 INFO L175 Difference]: Start difference. First operand has 472 places, 598 transitions, 6291 flow. Second operand 8 states and 207 transitions. [2024-06-21 16:10:11,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 617 transitions, 7567 flow [2024-06-21 16:10:20,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 617 transitions, 7073 flow, removed 93 selfloop flow, removed 5 redundant places. [2024-06-21 16:10:20,196 INFO L231 Difference]: Finished difference. Result has 475 places, 598 transitions, 6123 flow [2024-06-21 16:10:20,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5797, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6123, PETRI_PLACES=475, PETRI_TRANSITIONS=598} [2024-06-21 16:10:20,196 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 431 predicate places. [2024-06-21 16:10:20,197 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 598 transitions, 6123 flow [2024-06-21 16:10:20,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:20,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:20,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:20,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-21 16:10:20,197 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:20,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:20,197 INFO L85 PathProgramCache]: Analyzing trace with hash -147292728, now seen corresponding path program 1 times [2024-06-21 16:10:20,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:20,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505042976] [2024-06-21 16:10:20,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:20,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:20,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:20,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:20,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505042976] [2024-06-21 16:10:20,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505042976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:20,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:20,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:10:20,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493983442] [2024-06-21 16:10:20,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:20,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:10:20,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:20,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:10:20,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:10:20,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:10:20,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 598 transitions, 6123 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:20,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:20,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:10:20,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:22,033 INFO L124 PetriNetUnfolderBase]: 3598/6271 cut-off events. [2024-06-21 16:10:22,034 INFO L125 PetriNetUnfolderBase]: For 1784293/1784293 co-relation queries the response was YES. [2024-06-21 16:10:22,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49823 conditions, 6271 events. 3598/6271 cut-off events. For 1784293/1784293 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 44997 event pairs, 654 based on Foata normal form. 12/6276 useless extension candidates. Maximal degree in co-relation 49591. Up to 4975 conditions per place. [2024-06-21 16:10:22,150 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 445 selfloop transitions, 169 changer transitions 0/624 dead transitions. [2024-06-21 16:10:22,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 624 transitions, 7971 flow [2024-06-21 16:10:22,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:10:22,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:10:22,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-21 16:10:22,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6104651162790697 [2024-06-21 16:10:22,152 INFO L175 Difference]: Start difference. First operand has 475 places, 598 transitions, 6123 flow. Second operand 8 states and 210 transitions. [2024-06-21 16:10:22,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 624 transitions, 7971 flow [2024-06-21 16:10:30,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 624 transitions, 7635 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 16:10:30,734 INFO L231 Difference]: Finished difference. Result has 476 places, 601 transitions, 6306 flow [2024-06-21 16:10:30,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5787, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6306, PETRI_PLACES=476, PETRI_TRANSITIONS=601} [2024-06-21 16:10:30,735 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 432 predicate places. [2024-06-21 16:10:30,735 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 601 transitions, 6306 flow [2024-06-21 16:10:30,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:30,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:30,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:30,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-21 16:10:30,736 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:30,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:30,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1797382858, now seen corresponding path program 7 times [2024-06-21 16:10:30,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:30,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914004893] [2024-06-21 16:10:30,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:30,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:30,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:30,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:30,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:30,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914004893] [2024-06-21 16:10:30,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914004893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:30,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:30,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:10:30,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54360238] [2024-06-21 16:10:30,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:30,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:10:30,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:30,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:10:30,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:10:30,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:10:30,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 601 transitions, 6306 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:30,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:30,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:10:30,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:32,644 INFO L124 PetriNetUnfolderBase]: 3654/6343 cut-off events. [2024-06-21 16:10:32,644 INFO L125 PetriNetUnfolderBase]: For 1884310/1884310 co-relation queries the response was YES. [2024-06-21 16:10:32,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51131 conditions, 6343 events. 3654/6343 cut-off events. For 1884310/1884310 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 45514 event pairs, 736 based on Foata normal form. 16/6351 useless extension candidates. Maximal degree in co-relation 50898. Up to 5305 conditions per place. [2024-06-21 16:10:32,751 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 445 selfloop transitions, 164 changer transitions 0/619 dead transitions. [2024-06-21 16:10:32,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 619 transitions, 7690 flow [2024-06-21 16:10:32,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:10:32,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:10:32,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-21 16:10:32,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6017441860465116 [2024-06-21 16:10:32,753 INFO L175 Difference]: Start difference. First operand has 476 places, 601 transitions, 6306 flow. Second operand 8 states and 207 transitions. [2024-06-21 16:10:32,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 619 transitions, 7690 flow [2024-06-21 16:10:42,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 619 transitions, 7400 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-21 16:10:42,444 INFO L231 Difference]: Finished difference. Result has 480 places, 603 transitions, 6466 flow [2024-06-21 16:10:42,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6016, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6466, PETRI_PLACES=480, PETRI_TRANSITIONS=603} [2024-06-21 16:10:42,445 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 436 predicate places. [2024-06-21 16:10:42,445 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 603 transitions, 6466 flow [2024-06-21 16:10:42,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:42,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:42,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:42,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-21 16:10:42,464 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:42,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:42,465 INFO L85 PathProgramCache]: Analyzing trace with hash -340741140, now seen corresponding path program 8 times [2024-06-21 16:10:42,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:42,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077554514] [2024-06-21 16:10:42,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:42,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:42,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:42,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:42,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:42,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077554514] [2024-06-21 16:10:42,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077554514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:42,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:42,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:10:42,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567561356] [2024-06-21 16:10:42,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:42,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:10:42,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:42,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:10:42,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:10:42,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:10:42,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 603 transitions, 6466 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:42,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:42,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:10:42,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:44,412 INFO L124 PetriNetUnfolderBase]: 3710/6435 cut-off events. [2024-06-21 16:10:44,412 INFO L125 PetriNetUnfolderBase]: For 1908370/1908370 co-relation queries the response was YES. [2024-06-21 16:10:44,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52129 conditions, 6435 events. 3710/6435 cut-off events. For 1908370/1908370 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 46244 event pairs, 746 based on Foata normal form. 16/6443 useless extension candidates. Maximal degree in co-relation 51894. Up to 5393 conditions per place. [2024-06-21 16:10:44,534 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 446 selfloop transitions, 165 changer transitions 0/621 dead transitions. [2024-06-21 16:10:44,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 621 transitions, 7858 flow [2024-06-21 16:10:44,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:10:44,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:10:44,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-21 16:10:44,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5988372093023255 [2024-06-21 16:10:44,535 INFO L175 Difference]: Start difference. First operand has 480 places, 603 transitions, 6466 flow. Second operand 8 states and 206 transitions. [2024-06-21 16:10:44,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 621 transitions, 7858 flow [2024-06-21 16:10:55,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 621 transitions, 7434 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-21 16:10:55,587 INFO L231 Difference]: Finished difference. Result has 482 places, 605 transitions, 6498 flow [2024-06-21 16:10:55,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6042, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6498, PETRI_PLACES=482, PETRI_TRANSITIONS=605} [2024-06-21 16:10:55,588 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 438 predicate places. [2024-06-21 16:10:55,588 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 605 transitions, 6498 flow [2024-06-21 16:10:55,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:55,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:55,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:55,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-21 16:10:55,589 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:55,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:55,589 INFO L85 PathProgramCache]: Analyzing trace with hash -56518988, now seen corresponding path program 9 times [2024-06-21 16:10:55,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:55,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64966990] [2024-06-21 16:10:55,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:55,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:55,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:55,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:55,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64966990] [2024-06-21 16:10:55,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64966990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:55,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:55,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:10:55,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885859789] [2024-06-21 16:10:55,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:55,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:10:55,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:55,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:10:55,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:10:55,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:10:55,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 605 transitions, 6498 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:55,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:55,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:10:55,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:57,591 INFO L124 PetriNetUnfolderBase]: 3829/6622 cut-off events. [2024-06-21 16:10:57,592 INFO L125 PetriNetUnfolderBase]: For 2115012/2115012 co-relation queries the response was YES. [2024-06-21 16:10:57,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56563 conditions, 6622 events. 3829/6622 cut-off events. For 2115012/2115012 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 47620 event pairs, 765 based on Foata normal form. 12/6626 useless extension candidates. Maximal degree in co-relation 56327. Up to 5354 conditions per place. [2024-06-21 16:10:57,706 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 446 selfloop transitions, 173 changer transitions 0/629 dead transitions. [2024-06-21 16:10:57,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 629 transitions, 8420 flow [2024-06-21 16:10:57,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:10:57,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:10:57,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-21 16:10:57,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6075581395348837 [2024-06-21 16:10:57,707 INFO L175 Difference]: Start difference. First operand has 482 places, 605 transitions, 6498 flow. Second operand 8 states and 209 transitions. [2024-06-21 16:10:57,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 629 transitions, 8420 flow [2024-06-21 16:11:09,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 629 transitions, 7990 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-21 16:11:09,730 INFO L231 Difference]: Finished difference. Result has 484 places, 609 transitions, 6663 flow [2024-06-21 16:11:09,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6068, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6663, PETRI_PLACES=484, PETRI_TRANSITIONS=609} [2024-06-21 16:11:09,730 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 440 predicate places. [2024-06-21 16:11:09,730 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 609 transitions, 6663 flow [2024-06-21 16:11:09,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:09,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:09,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:09,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-21 16:11:09,731 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:09,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:09,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1009771864, now seen corresponding path program 10 times [2024-06-21 16:11:09,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:09,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032843695] [2024-06-21 16:11:09,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:09,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:09,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:09,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:09,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032843695] [2024-06-21 16:11:09,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032843695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:09,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:09,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:11:09,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620585838] [2024-06-21 16:11:09,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:09,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:11:09,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:09,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:11:09,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:11:09,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:11:09,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 609 transitions, 6663 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:09,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:09,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:11:09,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:11,544 INFO L124 PetriNetUnfolderBase]: 3793/6572 cut-off events. [2024-06-21 16:11:11,544 INFO L125 PetriNetUnfolderBase]: For 1912661/1912661 co-relation queries the response was YES. [2024-06-21 16:11:11,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52401 conditions, 6572 events. 3793/6572 cut-off events. For 1912661/1912661 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 47368 event pairs, 763 based on Foata normal form. 16/6580 useless extension candidates. Maximal degree in co-relation 52164. Up to 5526 conditions per place. [2024-06-21 16:11:11,658 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 446 selfloop transitions, 169 changer transitions 0/625 dead transitions. [2024-06-21 16:11:11,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 625 transitions, 7947 flow [2024-06-21 16:11:11,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:11:11,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:11:11,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 16:11:11,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959302325581395 [2024-06-21 16:11:11,659 INFO L175 Difference]: Start difference. First operand has 484 places, 609 transitions, 6663 flow. Second operand 8 states and 205 transitions. [2024-06-21 16:11:11,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 625 transitions, 7947 flow [2024-06-21 16:11:23,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 625 transitions, 7547 flow, removed 104 selfloop flow, removed 4 redundant places. [2024-06-21 16:11:23,438 INFO L231 Difference]: Finished difference. Result has 488 places, 609 transitions, 6607 flow [2024-06-21 16:11:23,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6263, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6607, PETRI_PLACES=488, PETRI_TRANSITIONS=609} [2024-06-21 16:11:23,438 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 444 predicate places. [2024-06-21 16:11:23,438 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 609 transitions, 6607 flow [2024-06-21 16:11:23,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:23,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:23,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:23,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-21 16:11:23,439 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:23,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:23,439 INFO L85 PathProgramCache]: Analyzing trace with hash -764135992, now seen corresponding path program 2 times [2024-06-21 16:11:23,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:23,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817109957] [2024-06-21 16:11:23,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:23,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:23,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:23,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817109957] [2024-06-21 16:11:23,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817109957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:23,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:23,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:11:23,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748784351] [2024-06-21 16:11:23,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:23,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:11:23,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:23,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:11:23,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:11:23,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:11:23,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 609 transitions, 6607 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:23,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:23,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:11:23,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:25,325 INFO L124 PetriNetUnfolderBase]: 3833/6642 cut-off events. [2024-06-21 16:11:25,325 INFO L125 PetriNetUnfolderBase]: For 1847163/1847163 co-relation queries the response was YES. [2024-06-21 16:11:25,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52377 conditions, 6642 events. 3833/6642 cut-off events. For 1847163/1847163 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 47941 event pairs, 761 based on Foata normal form. 12/6646 useless extension candidates. Maximal degree in co-relation 52138. Up to 5466 conditions per place. [2024-06-21 16:11:25,440 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 450 selfloop transitions, 170 changer transitions 0/630 dead transitions. [2024-06-21 16:11:25,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 630 transitions, 8041 flow [2024-06-21 16:11:25,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:11:25,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:11:25,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-21 16:11:25,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6075581395348837 [2024-06-21 16:11:25,442 INFO L175 Difference]: Start difference. First operand has 488 places, 609 transitions, 6607 flow. Second operand 8 states and 209 transitions. [2024-06-21 16:11:25,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 630 transitions, 8041 flow [2024-06-21 16:11:36,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 630 transitions, 7679 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 16:11:36,853 INFO L231 Difference]: Finished difference. Result has 489 places, 611 transitions, 6718 flow [2024-06-21 16:11:36,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6245, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6718, PETRI_PLACES=489, PETRI_TRANSITIONS=611} [2024-06-21 16:11:36,854 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 445 predicate places. [2024-06-21 16:11:36,854 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 611 transitions, 6718 flow [2024-06-21 16:11:36,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:36,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:36,854 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] [2024-06-21 16:11:36,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-21 16:11:36,854 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:36,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:36,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1001194040, now seen corresponding path program 3 times [2024-06-21 16:11:36,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:36,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288662769] [2024-06-21 16:11:36,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:36,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:36,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:36,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:36,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:36,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288662769] [2024-06-21 16:11:36,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288662769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:36,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:36,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:11:36,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569790243] [2024-06-21 16:11:36,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:36,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:11:36,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:36,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:11:36,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:11:37,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:11:37,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 611 transitions, 6718 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:37,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:37,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:11:37,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:38,688 INFO L124 PetriNetUnfolderBase]: 3873/6714 cut-off events. [2024-06-21 16:11:38,688 INFO L125 PetriNetUnfolderBase]: For 1878572/1878572 co-relation queries the response was YES. [2024-06-21 16:11:38,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53389 conditions, 6714 events. 3873/6714 cut-off events. For 1878572/1878572 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 48649 event pairs, 773 based on Foata normal form. 12/6718 useless extension candidates. Maximal degree in co-relation 53149. Up to 5594 conditions per place. [2024-06-21 16:11:38,804 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 449 selfloop transitions, 173 changer transitions 0/632 dead transitions. [2024-06-21 16:11:38,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 632 transitions, 8160 flow [2024-06-21 16:11:38,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:11:38,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:11:38,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-21 16:11:38,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-21 16:11:38,806 INFO L175 Difference]: Start difference. First operand has 489 places, 611 transitions, 6718 flow. Second operand 8 states and 208 transitions. [2024-06-21 16:11:38,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 632 transitions, 8160 flow [2024-06-21 16:11:53,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 632 transitions, 7709 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-21 16:11:53,714 INFO L231 Difference]: Finished difference. Result has 491 places, 613 transitions, 6750 flow [2024-06-21 16:11:53,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6267, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6750, PETRI_PLACES=491, PETRI_TRANSITIONS=613} [2024-06-21 16:11:53,714 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 447 predicate places. [2024-06-21 16:11:53,714 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 613 transitions, 6750 flow [2024-06-21 16:11:53,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:53,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:53,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:53,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-21 16:11:53,715 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:53,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:53,715 INFO L85 PathProgramCache]: Analyzing trace with hash 475846088, now seen corresponding path program 4 times [2024-06-21 16:11:53,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:53,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135574088] [2024-06-21 16:11:53,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:53,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:53,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:53,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:53,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135574088] [2024-06-21 16:11:53,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135574088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:53,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:53,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:11:53,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942019274] [2024-06-21 16:11:53,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:53,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:11:53,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:53,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:11:53,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:11:53,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:11:53,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 613 transitions, 6750 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:53,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:53,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:11:53,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:55,576 INFO L124 PetriNetUnfolderBase]: 3880/6727 cut-off events. [2024-06-21 16:11:55,576 INFO L125 PetriNetUnfolderBase]: For 1787741/1787741 co-relation queries the response was YES. [2024-06-21 16:11:55,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52025 conditions, 6727 events. 3880/6727 cut-off events. For 1787741/1787741 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 48677 event pairs, 750 based on Foata normal form. 12/6731 useless extension candidates. Maximal degree in co-relation 51784. Up to 5037 conditions per place. [2024-06-21 16:11:55,695 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 427 selfloop transitions, 198 changer transitions 0/635 dead transitions. [2024-06-21 16:11:55,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 635 transitions, 8532 flow [2024-06-21 16:11:55,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:11:55,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:11:55,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-21 16:11:55,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6075581395348837 [2024-06-21 16:11:55,696 INFO L175 Difference]: Start difference. First operand has 491 places, 613 transitions, 6750 flow. Second operand 8 states and 209 transitions. [2024-06-21 16:11:55,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 635 transitions, 8532 flow [2024-06-21 16:12:08,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 635 transitions, 8071 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-21 16:12:08,998 INFO L231 Difference]: Finished difference. Result has 493 places, 614 transitions, 6768 flow [2024-06-21 16:12:08,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6289, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6768, PETRI_PLACES=493, PETRI_TRANSITIONS=614} [2024-06-21 16:12:08,998 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 449 predicate places. [2024-06-21 16:12:08,998 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 614 transitions, 6768 flow [2024-06-21 16:12:08,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:08,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:08,999 INFO L208 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, 1] [2024-06-21 16:12:08,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-21 16:12:08,999 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:08,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:08,999 INFO L85 PathProgramCache]: Analyzing trace with hash 943165583, now seen corresponding path program 1 times [2024-06-21 16:12:08,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:09,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885275747] [2024-06-21 16:12:09,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:09,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:09,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:09,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:09,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:09,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885275747] [2024-06-21 16:12:09,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885275747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:09,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:09,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:12:09,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681049297] [2024-06-21 16:12:09,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:09,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:12:09,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:09,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:12:09,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:12:09,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:12:09,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 614 transitions, 6768 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:09,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:09,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:12:09,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:11,112 INFO L124 PetriNetUnfolderBase]: 3900/6770 cut-off events. [2024-06-21 16:12:11,112 INFO L125 PetriNetUnfolderBase]: For 1709117/1709117 co-relation queries the response was YES. [2024-06-21 16:12:11,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52252 conditions, 6770 events. 3900/6770 cut-off events. For 1709117/1709117 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 49024 event pairs, 600 based on Foata normal form. 6/6770 useless extension candidates. Maximal degree in co-relation 52010. Up to 5554 conditions per place. [2024-06-21 16:12:11,230 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 615 selfloop transitions, 39 changer transitions 0/664 dead transitions. [2024-06-21 16:12:11,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 664 transitions, 8308 flow [2024-06-21 16:12:11,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:12:11,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:12:11,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 271 transitions. [2024-06-21 16:12:11,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6302325581395349 [2024-06-21 16:12:11,231 INFO L175 Difference]: Start difference. First operand has 493 places, 614 transitions, 6768 flow. Second operand 10 states and 271 transitions. [2024-06-21 16:12:11,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 664 transitions, 8308 flow [2024-06-21 16:12:20,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 664 transitions, 7769 flow, removed 61 selfloop flow, removed 8 redundant places. [2024-06-21 16:12:20,085 INFO L231 Difference]: Finished difference. Result has 495 places, 615 transitions, 6383 flow [2024-06-21 16:12:20,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6229, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6383, PETRI_PLACES=495, PETRI_TRANSITIONS=615} [2024-06-21 16:12:20,085 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 451 predicate places. [2024-06-21 16:12:20,086 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 615 transitions, 6383 flow [2024-06-21 16:12:20,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:20,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:20,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:20,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-21 16:12:20,086 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:20,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:20,086 INFO L85 PathProgramCache]: Analyzing trace with hash 664034697, now seen corresponding path program 2 times [2024-06-21 16:12:20,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:20,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876361505] [2024-06-21 16:12:20,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:20,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:20,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:20,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:20,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876361505] [2024-06-21 16:12:20,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876361505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:20,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:20,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:12:20,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788080240] [2024-06-21 16:12:20,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:20,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:12:20,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:20,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:12:20,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:12:20,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:12:20,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 615 transitions, 6383 flow. Second operand has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:20,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:20,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:12:20,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:22,035 INFO L124 PetriNetUnfolderBase]: 3999/6962 cut-off events. [2024-06-21 16:12:22,035 INFO L125 PetriNetUnfolderBase]: For 1988618/1988618 co-relation queries the response was YES. [2024-06-21 16:12:22,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56063 conditions, 6962 events. 3999/6962 cut-off events. For 1988618/1988618 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 50699 event pairs, 489 based on Foata normal form. 6/6960 useless extension candidates. Maximal degree in co-relation 55822. Up to 5110 conditions per place. [2024-06-21 16:12:22,331 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 519 selfloop transitions, 125 changer transitions 0/654 dead transitions. [2024-06-21 16:12:22,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 654 transitions, 8795 flow [2024-06-21 16:12:22,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:12:22,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:12:22,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-21 16:12:22,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6395348837209303 [2024-06-21 16:12:22,332 INFO L175 Difference]: Start difference. First operand has 495 places, 615 transitions, 6383 flow. Second operand 8 states and 220 transitions. [2024-06-21 16:12:22,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 654 transitions, 8795 flow [2024-06-21 16:12:37,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 654 transitions, 8646 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-06-21 16:12:37,902 INFO L231 Difference]: Finished difference. Result has 494 places, 618 transitions, 6710 flow [2024-06-21 16:12:37,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6238, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6710, PETRI_PLACES=494, PETRI_TRANSITIONS=618} [2024-06-21 16:12:37,925 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 450 predicate places. [2024-06-21 16:12:37,925 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 618 transitions, 6710 flow [2024-06-21 16:12:37,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:37,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:37,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:37,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-21 16:12:37,926 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:37,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:37,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1519882431, now seen corresponding path program 3 times [2024-06-21 16:12:37,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:37,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813679290] [2024-06-21 16:12:37,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:37,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:37,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:38,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:38,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813679290] [2024-06-21 16:12:38,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813679290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:38,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:38,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:12:38,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718372857] [2024-06-21 16:12:38,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:38,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:12:38,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:38,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:12:38,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:12:38,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-06-21 16:12:38,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 618 transitions, 6710 flow. Second operand has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:38,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:38,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-06-21 16:12:38,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:40,088 INFO L124 PetriNetUnfolderBase]: 4065/7076 cut-off events. [2024-06-21 16:12:40,089 INFO L125 PetriNetUnfolderBase]: For 2158545/2158545 co-relation queries the response was YES. [2024-06-21 16:12:40,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59242 conditions, 7076 events. 4065/7076 cut-off events. For 2158545/2158545 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 51599 event pairs, 476 based on Foata normal form. 6/7074 useless extension candidates. Maximal degree in co-relation 59001. Up to 5146 conditions per place. [2024-06-21 16:12:40,214 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 507 selfloop transitions, 135 changer transitions 0/652 dead transitions. [2024-06-21 16:12:40,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 652 transitions, 9044 flow [2024-06-21 16:12:40,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:12:40,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:12:40,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-21 16:12:40,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6337209302325582 [2024-06-21 16:12:40,215 INFO L175 Difference]: Start difference. First operand has 494 places, 618 transitions, 6710 flow. Second operand 8 states and 218 transitions. [2024-06-21 16:12:40,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 652 transitions, 9044 flow Killed by 15