./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 19:18:32,818 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 19:18:32,877 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 19:18:32,883 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 19:18:32,883 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 19:18:32,905 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 19:18:32,905 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 19:18:32,906 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 19:18:32,906 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 19:18:32,909 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 19:18:32,909 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 19:18:32,909 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 19:18:32,910 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 19:18:32,911 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 19:18:32,911 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 19:18:32,912 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 19:18:32,912 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 19:18:32,912 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 19:18:32,912 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 19:18:32,912 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 19:18:32,913 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 19:18:32,913 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 19:18:32,913 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 19:18:32,913 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 19:18:32,914 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 19:18:32,914 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 19:18:32,914 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 19:18:32,914 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 19:18:32,915 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 19:18:32,915 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 19:18:32,916 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 19:18:32,916 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 19:18:32,916 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:18:32,916 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 19:18:32,916 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 19:18:32,916 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 19:18:32,917 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 19:18:32,917 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 19:18:32,917 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 19:18:32,917 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 19:18:32,917 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 19:18:32,918 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 19:18:32,918 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 19:18:32,918 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 19:18:33,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 19:18:33,135 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 19:18:33,138 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 19:18:33,139 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 19:18:33,139 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 19:18:33,140 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 19:18:34,079 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 19:18:34,258 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 19:18:34,258 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 19:18:34,283 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1518a56b/4fc1b564931f407c898bda32a8fe4689/FLAG5a0fa7025 [2024-06-27 19:18:34,293 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1518a56b/4fc1b564931f407c898bda32a8fe4689 [2024-06-27 19:18:34,295 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 19:18:34,296 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 19:18:34,297 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-27 19:18:34,404 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 19:18:34,405 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 19:18:34,406 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 19:18:34,406 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 19:18:34,410 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 19:18:34,410 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:18:34" (1/2) ... [2024-06-27 19:18:34,411 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d704815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:18:34, skipping insertion in model container [2024-06-27 19:18:34,411 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:18:34" (1/2) ... [2024-06-27 19:18:34,413 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2d23a458 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:18:34, skipping insertion in model container [2024-06-27 19:18:34,413 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:18:34" (2/2) ... [2024-06-27 19:18:34,413 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d704815 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:18:34, skipping insertion in model container [2024-06-27 19:18:34,414 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:18:34" (2/2) ... [2024-06-27 19:18:34,414 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 19:18:34,452 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 19:18:34,453 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] ((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-27 19:18:34,453 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-27 19:18:34,453 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] ((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-27 19:18:34,453 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 19:18:34,454 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-27 19:18:34,493 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 19:18:34,789 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:18:34,795 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 19:18:34,864 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:18:34,892 INFO L206 MainTranslator]: Completed translation [2024-06-27 19:18:34,893 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:18:34 WrapperNode [2024-06-27 19:18:34,893 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 19:18:34,894 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 19:18:34,894 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 19:18:34,894 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 19:18:34,899 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 27.06 07:18:34" (1/1) ... [2024-06-27 19:18:34,912 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 27.06 07:18:34" (1/1) ... [2024-06-27 19:18:34,927 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 67 [2024-06-27 19:18:34,927 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 19:18:34,928 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 19:18:34,928 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 19:18:34,928 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 19:18:34,935 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:18:34" (1/1) ... [2024-06-27 19:18:34,935 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:18:34" (1/1) ... [2024-06-27 19:18:34,937 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:18:34" (1/1) ... [2024-06-27 19:18:34,946 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]. [2024-06-27 19:18:34,947 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:18:34" (1/1) ... [2024-06-27 19:18:34,947 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:18:34" (1/1) ... [2024-06-27 19:18:34,951 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:18:34" (1/1) ... [2024-06-27 19:18:34,953 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:18:34" (1/1) ... [2024-06-27 19:18:34,954 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:18:34" (1/1) ... [2024-06-27 19:18:34,955 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:18:34" (1/1) ... [2024-06-27 19:18:34,961 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 19:18:34,967 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 19:18:34,967 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 19:18:34,967 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 19:18:34,968 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:18:34" (1/1) ... [2024-06-27 19:18:34,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:18:34,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 19:18:34,988 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) [2024-06-27 19:18:34,996 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 [2024-06-27 19:18:35,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 19:18:35,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 19:18:35,045 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 19:18:35,045 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 19:18:35,045 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 19:18:35,045 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 19:18:35,045 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 19:18:35,046 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 19:18:35,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 19:18:35,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 19:18:35,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 19:18:35,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 19:18:35,047 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 19:18:35,153 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 19:18:35,155 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 19:18:35,283 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 19:18:35,284 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 19:18:35,371 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 19:18:35,371 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 19:18:35,371 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:18:35 BoogieIcfgContainer [2024-06-27 19:18:35,371 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 19:18:35,373 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 19:18:35,373 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 19:18:35,375 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 19:18:35,375 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 07:18:34" (1/4) ... [2024-06-27 19:18:35,375 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@699efec3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:18:35, skipping insertion in model container [2024-06-27 19:18:35,376 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:18:34" (2/4) ... [2024-06-27 19:18:35,376 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@699efec3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:18:35, skipping insertion in model container [2024-06-27 19:18:35,376 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:18:34" (3/4) ... [2024-06-27 19:18:35,376 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@699efec3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:18:35, skipping insertion in model container [2024-06-27 19:18:35,376 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:18:35" (4/4) ... [2024-06-27 19:18:35,377 INFO L112 eAbstractionObserver]: Analyzing ICFG safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 19:18:35,391 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 19:18:35,391 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 19:18:35,391 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 19:18:35,418 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 19:18:35,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 19:18:35,459 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-27 19:18:35,459 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:18:35,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 19:18:35,461 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 19:18:35,463 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-27 19:18:35,470 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 19:18:35,474 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;@18db5fe7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 19:18:35,475 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 19:18:35,477 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 19:18:35,477 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 19:18:35,477 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:18:35,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:35,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 19:18:35,478 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)] === [2024-06-27 19:18:35,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:35,482 INFO L85 PathProgramCache]: Analyzing trace with hash 219098506, now seen corresponding path program 1 times [2024-06-27 19:18:35,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:35,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787420842] [2024-06-27 19:18:35,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:35,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:35,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:35,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:35,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787420842] [2024-06-27 19:18:35,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787420842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:35,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:35,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 19:18:35,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114674453] [2024-06-27 19:18:35,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:35,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 19:18:35,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:35,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 19:18:35,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 19:18:35,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-27 19:18:35,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:35,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:35,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-27 19:18:35,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:36,112 INFO L124 PetriNetUnfolderBase]: 471/807 cut-off events. [2024-06-27 19:18:36,113 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-27 19:18:36,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1595 conditions, 807 events. 471/807 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3881 event pairs, 288 based on Foata normal form. 1/786 useless extension candidates. Maximal degree in co-relation 1583. Up to 733 conditions per place. [2024-06-27 19:18:36,125 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 27 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-27 19:18:36,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 159 flow [2024-06-27 19:18:36,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 19:18:36,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 19:18:36,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-06-27 19:18:36,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2024-06-27 19:18:36,135 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 85 transitions. [2024-06-27 19:18:36,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 159 flow [2024-06-27 19:18:36,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 154 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:36,139 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-27 19:18:36,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-27 19:18:36,143 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-27 19:18:36,143 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-27 19:18:36,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:36,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:36,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:36,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 19:18:36,144 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)] === [2024-06-27 19:18:36,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:36,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1165332823, now seen corresponding path program 1 times [2024-06-27 19:18:36,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:36,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311457539] [2024-06-27 19:18:36,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:36,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:36,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:36,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:36,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311457539] [2024-06-27 19:18:36,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311457539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:36,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:36,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:18:36,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65616928] [2024-06-27 19:18:36,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:36,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:36,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:36,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:36,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:36,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:36,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:36,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:36,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:36,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:36,497 INFO L124 PetriNetUnfolderBase]: 754/1256 cut-off events. [2024-06-27 19:18:36,498 INFO L125 PetriNetUnfolderBase]: For 195/205 co-relation queries the response was YES. [2024-06-27 19:18:36,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2858 conditions, 1256 events. 754/1256 cut-off events. For 195/205 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6202 event pairs, 318 based on Foata normal form. 6/1258 useless extension candidates. Maximal degree in co-relation 2846. Up to 1124 conditions per place. [2024-06-27 19:18:36,504 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 40 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-27 19:18:36,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 55 transitions, 250 flow [2024-06-27 19:18:36,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:18:36,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:18:36,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2024-06-27 19:18:36,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.66875 [2024-06-27 19:18:36,509 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 107 transitions. [2024-06-27 19:18:36,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 55 transitions, 250 flow [2024-06-27 19:18:36,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 55 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 19:18:36,511 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 150 flow [2024-06-27 19:18:36,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-06-27 19:18:36,512 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-27 19:18:36,512 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 150 flow [2024-06-27 19:18:36,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:36,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:36,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:36,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 19:18:36,515 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:36,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:36,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1101657832, now seen corresponding path program 1 times [2024-06-27 19:18:36,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:36,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028277132] [2024-06-27 19:18:36,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:36,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:36,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:36,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:36,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:36,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028277132] [2024-06-27 19:18:36,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028277132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:36,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:36,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:36,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448375089] [2024-06-27 19:18:36,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:36,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:18:36,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:36,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:18:36,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:18:36,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:36,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 150 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:36,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:36,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:36,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:36,899 INFO L124 PetriNetUnfolderBase]: 745/1241 cut-off events. [2024-06-27 19:18:36,899 INFO L125 PetriNetUnfolderBase]: For 594/630 co-relation queries the response was YES. [2024-06-27 19:18:36,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3172 conditions, 1241 events. 745/1241 cut-off events. For 594/630 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6088 event pairs, 218 based on Foata normal form. 19/1256 useless extension candidates. Maximal degree in co-relation 3157. Up to 1079 conditions per place. [2024-06-27 19:18:36,907 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 44 selfloop transitions, 9 changer transitions 0/61 dead transitions. [2024-06-27 19:18:36,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 61 transitions, 310 flow [2024-06-27 19:18:36,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:36,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:36,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-27 19:18:36,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-06-27 19:18:36,910 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 150 flow. Second operand 5 states and 128 transitions. [2024-06-27 19:18:36,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 61 transitions, 310 flow [2024-06-27 19:18:36,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 61 transitions, 308 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 19:18:36,914 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 181 flow [2024-06-27 19:18:36,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=181, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2024-06-27 19:18:36,915 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2024-06-27 19:18:36,915 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 181 flow [2024-06-27 19:18:36,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:36,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:36,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:36,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 19:18:36,916 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:36,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:36,916 INFO L85 PathProgramCache]: Analyzing trace with hash -2113468487, now seen corresponding path program 1 times [2024-06-27 19:18:36,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:36,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337001211] [2024-06-27 19:18:36,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:36,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:37,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:37,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:37,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337001211] [2024-06-27 19:18:37,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337001211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:37,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:37,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:18:37,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096591978] [2024-06-27 19:18:37,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:37,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:37,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:37,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:37,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:37,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:37,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 41 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:37,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:37,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:37,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:37,191 INFO L124 PetriNetUnfolderBase]: 697/1162 cut-off events. [2024-06-27 19:18:37,191 INFO L125 PetriNetUnfolderBase]: For 1029/1029 co-relation queries the response was YES. [2024-06-27 19:18:37,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3245 conditions, 1162 events. 697/1162 cut-off events. For 1029/1029 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5827 event pairs, 308 based on Foata normal form. 2/1162 useless extension candidates. Maximal degree in co-relation 3227. Up to 1047 conditions per place. [2024-06-27 19:18:37,197 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 44 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-06-27 19:18:37,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 60 transitions, 350 flow [2024-06-27 19:18:37,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:18:37,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:18:37,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-27 19:18:37,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-27 19:18:37,199 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 181 flow. Second operand 4 states and 102 transitions. [2024-06-27 19:18:37,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 60 transitions, 350 flow [2024-06-27 19:18:37,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 60 transitions, 325 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:37,205 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 229 flow [2024-06-27 19:18:37,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=229, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2024-06-27 19:18:37,207 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2024-06-27 19:18:37,207 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 229 flow [2024-06-27 19:18:37,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:37,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:37,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:37,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 19:18:37,208 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)] === [2024-06-27 19:18:37,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:37,208 INFO L85 PathProgramCache]: Analyzing trace with hash 298840478, now seen corresponding path program 1 times [2024-06-27 19:18:37,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:37,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851803302] [2024-06-27 19:18:37,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:37,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:37,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:37,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:37,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851803302] [2024-06-27 19:18:37,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851803302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:37,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:37,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:37,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982545995] [2024-06-27 19:18:37,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:37,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:18:37,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:37,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:18:37,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:18:37,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:37,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 229 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:37,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:37,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:37,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:37,524 INFO L124 PetriNetUnfolderBase]: 826/1387 cut-off events. [2024-06-27 19:18:37,525 INFO L125 PetriNetUnfolderBase]: For 1901/1945 co-relation queries the response was YES. [2024-06-27 19:18:37,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4179 conditions, 1387 events. 826/1387 cut-off events. For 1901/1945 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7004 event pairs, 293 based on Foata normal form. 16/1383 useless extension candidates. Maximal degree in co-relation 4159. Up to 1177 conditions per place. [2024-06-27 19:18:37,534 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 47 selfloop transitions, 18 changer transitions 0/75 dead transitions. [2024-06-27 19:18:37,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 75 transitions, 459 flow [2024-06-27 19:18:37,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:37,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:37,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-27 19:18:37,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.655 [2024-06-27 19:18:37,536 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 229 flow. Second operand 5 states and 131 transitions. [2024-06-27 19:18:37,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 75 transitions, 459 flow [2024-06-27 19:18:37,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 75 transitions, 457 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 19:18:37,542 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 309 flow [2024-06-27 19:18:37,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=309, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2024-06-27 19:18:37,544 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 15 predicate places. [2024-06-27 19:18:37,545 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 309 flow [2024-06-27 19:18:37,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:37,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:37,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:37,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 19:18:37,546 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)] === [2024-06-27 19:18:37,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:37,547 INFO L85 PathProgramCache]: Analyzing trace with hash 2136706782, now seen corresponding path program 2 times [2024-06-27 19:18:37,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:37,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107332126] [2024-06-27 19:18:37,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:37,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:37,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:37,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:37,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107332126] [2024-06-27 19:18:37,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107332126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:37,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:37,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:37,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223104467] [2024-06-27 19:18:37,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:37,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:18:37,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:37,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:18:37,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:18:37,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:37,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 309 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:37,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:37,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:37,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:37,873 INFO L124 PetriNetUnfolderBase]: 821/1380 cut-off events. [2024-06-27 19:18:37,873 INFO L125 PetriNetUnfolderBase]: For 3008/3070 co-relation queries the response was YES. [2024-06-27 19:18:37,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4570 conditions, 1380 events. 821/1380 cut-off events. For 3008/3070 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6947 event pairs, 293 based on Foata normal form. 18/1379 useless extension candidates. Maximal degree in co-relation 4547. Up to 1181 conditions per place. [2024-06-27 19:18:37,881 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 44 selfloop transitions, 15 changer transitions 0/69 dead transitions. [2024-06-27 19:18:37,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 69 transitions, 465 flow [2024-06-27 19:18:37,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:18:37,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:18:37,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2024-06-27 19:18:37,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.66875 [2024-06-27 19:18:37,883 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 309 flow. Second operand 4 states and 107 transitions. [2024-06-27 19:18:37,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 69 transitions, 465 flow [2024-06-27 19:18:37,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 69 transitions, 440 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-27 19:18:37,888 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 328 flow [2024-06-27 19:18:37,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=328, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-06-27 19:18:37,889 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2024-06-27 19:18:37,889 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 328 flow [2024-06-27 19:18:37,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:37,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:37,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:37,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 19:18:37,889 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:37,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:37,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1466029098, now seen corresponding path program 1 times [2024-06-27 19:18:37,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:37,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400611895] [2024-06-27 19:18:37,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:37,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:38,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:38,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400611895] [2024-06-27 19:18:38,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400611895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:38,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:38,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:38,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362984610] [2024-06-27 19:18:38,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:38,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:18:38,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:38,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:18:38,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:18:38,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:38,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 328 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:38,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:38,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:38,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:38,155 INFO L124 PetriNetUnfolderBase]: 697/1172 cut-off events. [2024-06-27 19:18:38,155 INFO L125 PetriNetUnfolderBase]: For 3080/3082 co-relation queries the response was YES. [2024-06-27 19:18:38,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4054 conditions, 1172 events. 697/1172 cut-off events. For 3080/3082 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5931 event pairs, 278 based on Foata normal form. 6/1176 useless extension candidates. Maximal degree in co-relation 4029. Up to 1029 conditions per place. [2024-06-27 19:18:38,161 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 55 selfloop transitions, 10 changer transitions 0/73 dead transitions. [2024-06-27 19:18:38,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 73 transitions, 513 flow [2024-06-27 19:18:38,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:38,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:38,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-27 19:18:38,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-27 19:18:38,162 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 328 flow. Second operand 5 states and 124 transitions. [2024-06-27 19:18:38,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 73 transitions, 513 flow [2024-06-27 19:18:38,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 73 transitions, 483 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:38,166 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 339 flow [2024-06-27 19:18:38,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=339, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-06-27 19:18:38,166 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 20 predicate places. [2024-06-27 19:18:38,166 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 339 flow [2024-06-27 19:18:38,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:38,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:38,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:38,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 19:18:38,167 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)] === [2024-06-27 19:18:38,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:38,167 INFO L85 PathProgramCache]: Analyzing trace with hash 674120920, now seen corresponding path program 1 times [2024-06-27 19:18:38,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:38,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598004068] [2024-06-27 19:18:38,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:38,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:38,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:38,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:38,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:38,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598004068] [2024-06-27 19:18:38,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598004068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:38,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:38,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:38,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192301827] [2024-06-27 19:18:38,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:38,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:38,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:38,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:38,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:38,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:38,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 339 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:38,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:38,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:38,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:38,475 INFO L124 PetriNetUnfolderBase]: 888/1471 cut-off events. [2024-06-27 19:18:38,475 INFO L125 PetriNetUnfolderBase]: For 4342/4346 co-relation queries the response was YES. [2024-06-27 19:18:38,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5175 conditions, 1471 events. 888/1471 cut-off events. For 4342/4346 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7289 event pairs, 323 based on Foata normal form. 6/1474 useless extension candidates. Maximal degree in co-relation 5149. Up to 1228 conditions per place. [2024-06-27 19:18:38,484 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 69 selfloop transitions, 19 changer transitions 0/95 dead transitions. [2024-06-27 19:18:38,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 95 transitions, 689 flow [2024-06-27 19:18:38,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:18:38,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:18:38,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 19:18:38,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 19:18:38,486 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 339 flow. Second operand 6 states and 150 transitions. [2024-06-27 19:18:38,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 95 transitions, 689 flow [2024-06-27 19:18:38,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 95 transitions, 666 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:38,491 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 465 flow [2024-06-27 19:18:38,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=465, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2024-06-27 19:18:38,492 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2024-06-27 19:18:38,492 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 465 flow [2024-06-27 19:18:38,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:38,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:38,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:38,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 19:18:38,493 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)] === [2024-06-27 19:18:38,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:38,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1813407076, now seen corresponding path program 2 times [2024-06-27 19:18:38,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:38,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218624980] [2024-06-27 19:18:38,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:38,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:38,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:38,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:38,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:38,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218624980] [2024-06-27 19:18:38,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218624980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:38,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:38,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:38,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251688940] [2024-06-27 19:18:38,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:38,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:38,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:38,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:38,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:38,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:38,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 465 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:38,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:38,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:38,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:38,842 INFO L124 PetriNetUnfolderBase]: 899/1494 cut-off events. [2024-06-27 19:18:38,843 INFO L125 PetriNetUnfolderBase]: For 5627/5637 co-relation queries the response was YES. [2024-06-27 19:18:38,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5642 conditions, 1494 events. 899/1494 cut-off events. For 5627/5637 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7459 event pairs, 310 based on Foata normal form. 12/1505 useless extension candidates. Maximal degree in co-relation 5613. Up to 1258 conditions per place. [2024-06-27 19:18:38,853 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 78 selfloop transitions, 19 changer transitions 0/104 dead transitions. [2024-06-27 19:18:38,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 104 transitions, 809 flow [2024-06-27 19:18:38,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:38,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:38,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 19:18:38,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-27 19:18:38,854 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 465 flow. Second operand 7 states and 170 transitions. [2024-06-27 19:18:38,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 104 transitions, 809 flow [2024-06-27 19:18:38,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 104 transitions, 773 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 19:18:38,866 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 523 flow [2024-06-27 19:18:38,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=523, PETRI_PLACES=72, PETRI_TRANSITIONS=73} [2024-06-27 19:18:38,867 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-27 19:18:38,867 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 523 flow [2024-06-27 19:18:38,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:38,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:38,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:38,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 19:18:38,868 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)] === [2024-06-27 19:18:38,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:38,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1813401496, now seen corresponding path program 3 times [2024-06-27 19:18:38,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:38,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246400881] [2024-06-27 19:18:38,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:38,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:38,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:39,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:39,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:39,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246400881] [2024-06-27 19:18:39,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246400881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:39,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:39,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:39,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079960286] [2024-06-27 19:18:39,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:39,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:39,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:39,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:39,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:39,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:39,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 73 transitions, 523 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:39,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:39,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:39,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:39,197 INFO L124 PetriNetUnfolderBase]: 894/1485 cut-off events. [2024-06-27 19:18:39,197 INFO L125 PetriNetUnfolderBase]: For 6651/6657 co-relation queries the response was YES. [2024-06-27 19:18:39,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5743 conditions, 1485 events. 894/1485 cut-off events. For 6651/6657 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7351 event pairs, 323 based on Foata normal form. 8/1490 useless extension candidates. Maximal degree in co-relation 5712. Up to 1253 conditions per place. [2024-06-27 19:18:39,206 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 68 selfloop transitions, 18 changer transitions 0/93 dead transitions. [2024-06-27 19:18:39,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 93 transitions, 748 flow [2024-06-27 19:18:39,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:39,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:39,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-27 19:18:39,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.635 [2024-06-27 19:18:39,208 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 523 flow. Second operand 5 states and 127 transitions. [2024-06-27 19:18:39,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 93 transitions, 748 flow [2024-06-27 19:18:39,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 93 transitions, 694 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:39,218 INFO L231 Difference]: Finished difference. Result has 73 places, 73 transitions, 513 flow [2024-06-27 19:18:39,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=513, PETRI_PLACES=73, PETRI_TRANSITIONS=73} [2024-06-27 19:18:39,219 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2024-06-27 19:18:39,219 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 73 transitions, 513 flow [2024-06-27 19:18:39,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:39,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:39,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:39,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 19:18:39,220 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:39,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:39,220 INFO L85 PathProgramCache]: Analyzing trace with hash -646658297, now seen corresponding path program 1 times [2024-06-27 19:18:39,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:39,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823987825] [2024-06-27 19:18:39,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:39,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:39,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:39,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:39,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:39,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823987825] [2024-06-27 19:18:39,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823987825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:39,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:39,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:18:39,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988471324] [2024-06-27 19:18:39,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:39,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:39,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:39,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:39,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:39,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:39,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 73 transitions, 513 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:39,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:39,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:39,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:39,456 INFO L124 PetriNetUnfolderBase]: 832/1381 cut-off events. [2024-06-27 19:18:39,456 INFO L125 PetriNetUnfolderBase]: For 7436/7438 co-relation queries the response was YES. [2024-06-27 19:18:39,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5517 conditions, 1381 events. 832/1381 cut-off events. For 7436/7438 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6895 event pairs, 278 based on Foata normal form. 3/1370 useless extension candidates. Maximal degree in co-relation 5485. Up to 1228 conditions per place. [2024-06-27 19:18:39,470 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 69 selfloop transitions, 9 changer transitions 0/90 dead transitions. [2024-06-27 19:18:39,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 90 transitions, 739 flow [2024-06-27 19:18:39,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:18:39,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:18:39,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-27 19:18:39,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-27 19:18:39,472 INFO L175 Difference]: Start difference. First operand has 73 places, 73 transitions, 513 flow. Second operand 4 states and 98 transitions. [2024-06-27 19:18:39,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 90 transitions, 739 flow [2024-06-27 19:18:39,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 90 transitions, 701 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:39,483 INFO L231 Difference]: Finished difference. Result has 74 places, 81 transitions, 565 flow [2024-06-27 19:18:39,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=565, PETRI_PLACES=74, PETRI_TRANSITIONS=81} [2024-06-27 19:18:39,484 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 33 predicate places. [2024-06-27 19:18:39,484 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 81 transitions, 565 flow [2024-06-27 19:18:39,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:39,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:39,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:39,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 19:18:39,485 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)] === [2024-06-27 19:18:39,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:39,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1363176749, now seen corresponding path program 1 times [2024-06-27 19:18:39,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:39,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774993345] [2024-06-27 19:18:39,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:39,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:39,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:39,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:39,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:39,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774993345] [2024-06-27 19:18:39,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774993345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:39,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:39,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:39,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480363209] [2024-06-27 19:18:39,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:39,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:39,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:39,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:39,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:39,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:39,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 81 transitions, 565 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:39,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:39,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:39,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:39,806 INFO L124 PetriNetUnfolderBase]: 854/1423 cut-off events. [2024-06-27 19:18:39,806 INFO L125 PetriNetUnfolderBase]: For 9361/9373 co-relation queries the response was YES. [2024-06-27 19:18:39,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6021 conditions, 1423 events. 854/1423 cut-off events. For 9361/9373 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7210 event pairs, 180 based on Foata normal form. 14/1388 useless extension candidates. Maximal degree in co-relation 5987. Up to 1100 conditions per place. [2024-06-27 19:18:39,814 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 63 selfloop transitions, 32 changer transitions 0/111 dead transitions. [2024-06-27 19:18:39,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 111 transitions, 897 flow [2024-06-27 19:18:39,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:18:39,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:18:39,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-27 19:18:39,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-27 19:18:39,815 INFO L175 Difference]: Start difference. First operand has 74 places, 81 transitions, 565 flow. Second operand 6 states and 154 transitions. [2024-06-27 19:18:39,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 111 transitions, 897 flow [2024-06-27 19:18:39,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 111 transitions, 893 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 19:18:39,826 INFO L231 Difference]: Finished difference. Result has 80 places, 85 transitions, 672 flow [2024-06-27 19:18:39,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=672, PETRI_PLACES=80, PETRI_TRANSITIONS=85} [2024-06-27 19:18:39,827 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 39 predicate places. [2024-06-27 19:18:39,827 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 85 transitions, 672 flow [2024-06-27 19:18:39,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:39,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:39,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:39,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 19:18:39,828 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)] === [2024-06-27 19:18:39,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:39,828 INFO L85 PathProgramCache]: Analyzing trace with hash -2089820353, now seen corresponding path program 2 times [2024-06-27 19:18:39,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:39,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505591024] [2024-06-27 19:18:39,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:39,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:39,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:39,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:39,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505591024] [2024-06-27 19:18:39,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505591024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:39,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:39,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:39,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127448971] [2024-06-27 19:18:39,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:39,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:39,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:39,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:39,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:39,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:39,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 85 transitions, 672 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:39,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:39,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:39,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:40,174 INFO L124 PetriNetUnfolderBase]: 871/1450 cut-off events. [2024-06-27 19:18:40,174 INFO L125 PetriNetUnfolderBase]: For 11696/11715 co-relation queries the response was YES. [2024-06-27 19:18:40,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6500 conditions, 1450 events. 871/1450 cut-off events. For 11696/11715 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7359 event pairs, 252 based on Foata normal form. 12/1409 useless extension candidates. Maximal degree in co-relation 6463. Up to 1198 conditions per place. [2024-06-27 19:18:40,183 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 64 selfloop transitions, 30 changer transitions 0/110 dead transitions. [2024-06-27 19:18:40,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 110 transitions, 940 flow [2024-06-27 19:18:40,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:18:40,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:18:40,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-27 19:18:40,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-27 19:18:40,185 INFO L175 Difference]: Start difference. First operand has 80 places, 85 transitions, 672 flow. Second operand 6 states and 151 transitions. [2024-06-27 19:18:40,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 110 transitions, 940 flow [2024-06-27 19:18:40,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 110 transitions, 888 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 19:18:40,198 INFO L231 Difference]: Finished difference. Result has 84 places, 87 transitions, 714 flow [2024-06-27 19:18:40,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=714, PETRI_PLACES=84, PETRI_TRANSITIONS=87} [2024-06-27 19:18:40,199 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-06-27 19:18:40,199 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 87 transitions, 714 flow [2024-06-27 19:18:40,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:40,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:40,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:40,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 19:18:40,200 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)] === [2024-06-27 19:18:40,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:40,201 INFO L85 PathProgramCache]: Analyzing trace with hash 380867293, now seen corresponding path program 3 times [2024-06-27 19:18:40,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:40,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837266207] [2024-06-27 19:18:40,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:40,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:40,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:40,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:40,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837266207] [2024-06-27 19:18:40,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837266207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:40,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:40,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:40,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212485429] [2024-06-27 19:18:40,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:40,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:40,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:40,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:40,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:40,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:40,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 87 transitions, 714 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:40,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:40,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:40,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:40,541 INFO L124 PetriNetUnfolderBase]: 859/1434 cut-off events. [2024-06-27 19:18:40,541 INFO L125 PetriNetUnfolderBase]: For 12730/12749 co-relation queries the response was YES. [2024-06-27 19:18:40,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6516 conditions, 1434 events. 859/1434 cut-off events. For 12730/12749 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7272 event pairs, 175 based on Foata normal form. 19/1403 useless extension candidates. Maximal degree in co-relation 6477. Up to 1161 conditions per place. [2024-06-27 19:18:40,549 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 63 selfloop transitions, 27 changer transitions 0/106 dead transitions. [2024-06-27 19:18:40,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 106 transitions, 942 flow [2024-06-27 19:18:40,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:40,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:40,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-27 19:18:40,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-27 19:18:40,551 INFO L175 Difference]: Start difference. First operand has 84 places, 87 transitions, 714 flow. Second operand 5 states and 130 transitions. [2024-06-27 19:18:40,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 106 transitions, 942 flow [2024-06-27 19:18:40,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 106 transitions, 868 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:40,568 INFO L231 Difference]: Finished difference. Result has 85 places, 87 transitions, 706 flow [2024-06-27 19:18:40,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=706, PETRI_PLACES=85, PETRI_TRANSITIONS=87} [2024-06-27 19:18:40,568 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 44 predicate places. [2024-06-27 19:18:40,568 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 87 transitions, 706 flow [2024-06-27 19:18:40,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:40,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:40,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:40,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 19:18:40,569 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:40,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:40,570 INFO L85 PathProgramCache]: Analyzing trace with hash -361794759, now seen corresponding path program 1 times [2024-06-27 19:18:40,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:40,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228054878] [2024-06-27 19:18:40,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:40,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:40,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:40,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:40,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:40,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228054878] [2024-06-27 19:18:40,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228054878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:40,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:40,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:40,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855010540] [2024-06-27 19:18:40,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:40,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:40,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:40,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:40,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:40,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:40,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 87 transitions, 706 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:40,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:40,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:40,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:40,980 INFO L124 PetriNetUnfolderBase]: 1027/1704 cut-off events. [2024-06-27 19:18:40,980 INFO L125 PetriNetUnfolderBase]: For 14624/14630 co-relation queries the response was YES. [2024-06-27 19:18:40,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7467 conditions, 1704 events. 1027/1704 cut-off events. For 14624/14630 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8780 event pairs, 220 based on Foata normal form. 18/1720 useless extension candidates. Maximal degree in co-relation 7427. Up to 1134 conditions per place. [2024-06-27 19:18:40,991 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 100 selfloop transitions, 26 changer transitions 0/133 dead transitions. [2024-06-27 19:18:40,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 133 transitions, 1174 flow [2024-06-27 19:18:40,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:40,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:40,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 19:18:40,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-27 19:18:40,993 INFO L175 Difference]: Start difference. First operand has 85 places, 87 transitions, 706 flow. Second operand 7 states and 176 transitions. [2024-06-27 19:18:40,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 133 transitions, 1174 flow [2024-06-27 19:18:41,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 133 transitions, 1105 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:41,012 INFO L231 Difference]: Finished difference. Result has 90 places, 92 transitions, 753 flow [2024-06-27 19:18:41,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=753, PETRI_PLACES=90, PETRI_TRANSITIONS=92} [2024-06-27 19:18:41,013 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 49 predicate places. [2024-06-27 19:18:41,013 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 92 transitions, 753 flow [2024-06-27 19:18:41,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:41,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:41,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:41,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 19:18:41,014 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:41,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:41,014 INFO L85 PathProgramCache]: Analyzing trace with hash 504326899, now seen corresponding path program 2 times [2024-06-27 19:18:41,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:41,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137549567] [2024-06-27 19:18:41,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:41,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:41,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:41,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:41,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:41,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137549567] [2024-06-27 19:18:41,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137549567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:41,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:41,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:41,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520263839] [2024-06-27 19:18:41,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:41,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:41,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:41,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:41,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:41,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:41,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 92 transitions, 753 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:41,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:41,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:41,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:41,405 INFO L124 PetriNetUnfolderBase]: 1085/1812 cut-off events. [2024-06-27 19:18:41,406 INFO L125 PetriNetUnfolderBase]: For 17010/17016 co-relation queries the response was YES. [2024-06-27 19:18:41,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8057 conditions, 1812 events. 1085/1812 cut-off events. For 17010/17016 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9593 event pairs, 325 based on Foata normal form. 22/1832 useless extension candidates. Maximal degree in co-relation 8014. Up to 1466 conditions per place. [2024-06-27 19:18:41,418 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 95 selfloop transitions, 24 changer transitions 0/126 dead transitions. [2024-06-27 19:18:41,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 126 transitions, 1098 flow [2024-06-27 19:18:41,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:41,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:41,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 19:18:41,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-27 19:18:41,420 INFO L175 Difference]: Start difference. First operand has 90 places, 92 transitions, 753 flow. Second operand 7 states and 171 transitions. [2024-06-27 19:18:41,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 126 transitions, 1098 flow [2024-06-27 19:18:41,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 126 transitions, 1068 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 19:18:41,448 INFO L231 Difference]: Finished difference. Result has 95 places, 93 transitions, 789 flow [2024-06-27 19:18:41,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=723, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=789, PETRI_PLACES=95, PETRI_TRANSITIONS=93} [2024-06-27 19:18:41,449 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-06-27 19:18:41,449 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 93 transitions, 789 flow [2024-06-27 19:18:41,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:41,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:41,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:41,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 19:18:41,450 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:41,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:41,451 INFO L85 PathProgramCache]: Analyzing trace with hash -273228999, now seen corresponding path program 3 times [2024-06-27 19:18:41,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:41,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274997647] [2024-06-27 19:18:41,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:41,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:41,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:41,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:41,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:41,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274997647] [2024-06-27 19:18:41,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274997647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:41,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:41,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:41,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780465762] [2024-06-27 19:18:41,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:41,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:41,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:41,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:41,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:41,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:41,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 93 transitions, 789 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:41,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:41,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:41,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:41,879 INFO L124 PetriNetUnfolderBase]: 1126/1883 cut-off events. [2024-06-27 19:18:41,880 INFO L125 PetriNetUnfolderBase]: For 18782/18788 co-relation queries the response was YES. [2024-06-27 19:18:41,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8549 conditions, 1883 events. 1126/1883 cut-off events. For 18782/18788 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10071 event pairs, 318 based on Foata normal form. 18/1899 useless extension candidates. Maximal degree in co-relation 8504. Up to 1450 conditions per place. [2024-06-27 19:18:41,890 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 99 selfloop transitions, 26 changer transitions 0/132 dead transitions. [2024-06-27 19:18:41,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 132 transitions, 1174 flow [2024-06-27 19:18:41,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:41,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:41,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 19:18:41,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-27 19:18:41,891 INFO L175 Difference]: Start difference. First operand has 95 places, 93 transitions, 789 flow. Second operand 7 states and 174 transitions. [2024-06-27 19:18:41,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 132 transitions, 1174 flow [2024-06-27 19:18:41,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 132 transitions, 1127 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 19:18:41,912 INFO L231 Difference]: Finished difference. Result has 98 places, 96 transitions, 837 flow [2024-06-27 19:18:41,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=837, PETRI_PLACES=98, PETRI_TRANSITIONS=96} [2024-06-27 19:18:41,913 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-06-27 19:18:41,913 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 96 transitions, 837 flow [2024-06-27 19:18:41,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:41,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:41,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:41,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 19:18:41,914 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)] === [2024-06-27 19:18:41,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:41,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1077867241, now seen corresponding path program 4 times [2024-06-27 19:18:41,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:41,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673328062] [2024-06-27 19:18:41,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:41,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:42,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:42,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:42,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673328062] [2024-06-27 19:18:42,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673328062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:42,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:42,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:42,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919928923] [2024-06-27 19:18:42,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:42,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:42,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:42,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:42,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:42,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:42,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 96 transitions, 837 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:42,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:42,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:42,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:42,333 INFO L124 PetriNetUnfolderBase]: 1184/1991 cut-off events. [2024-06-27 19:18:42,333 INFO L125 PetriNetUnfolderBase]: For 21864/21870 co-relation queries the response was YES. [2024-06-27 19:18:42,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9128 conditions, 1991 events. 1184/1991 cut-off events. For 21864/21870 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10833 event pairs, 352 based on Foata normal form. 22/2011 useless extension candidates. Maximal degree in co-relation 9081. Up to 1653 conditions per place. [2024-06-27 19:18:42,345 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 100 selfloop transitions, 19 changer transitions 0/126 dead transitions. [2024-06-27 19:18:42,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 126 transitions, 1176 flow [2024-06-27 19:18:42,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:18:42,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:18:42,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 19:18:42,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 19:18:42,347 INFO L175 Difference]: Start difference. First operand has 98 places, 96 transitions, 837 flow. Second operand 6 states and 150 transitions. [2024-06-27 19:18:42,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 126 transitions, 1176 flow [2024-06-27 19:18:42,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 126 transitions, 1144 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:42,376 INFO L231 Difference]: Finished difference. Result has 101 places, 97 transitions, 865 flow [2024-06-27 19:18:42,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=865, PETRI_PLACES=101, PETRI_TRANSITIONS=97} [2024-06-27 19:18:42,376 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2024-06-27 19:18:42,377 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 97 transitions, 865 flow [2024-06-27 19:18:42,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:42,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:42,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:42,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 19:18:42,377 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)] === [2024-06-27 19:18:42,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:42,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1078015111, now seen corresponding path program 5 times [2024-06-27 19:18:42,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:42,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116424213] [2024-06-27 19:18:42,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:42,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:42,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:42,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:42,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116424213] [2024-06-27 19:18:42,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116424213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:42,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:42,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:42,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643539103] [2024-06-27 19:18:42,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:42,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:42,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:42,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:42,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:42,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:42,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 97 transitions, 865 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:42,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:42,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:42,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:42,805 INFO L124 PetriNetUnfolderBase]: 1225/2062 cut-off events. [2024-06-27 19:18:42,805 INFO L125 PetriNetUnfolderBase]: For 23756/23762 co-relation queries the response was YES. [2024-06-27 19:18:42,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9608 conditions, 2062 events. 1225/2062 cut-off events. For 23756/23762 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11370 event pairs, 267 based on Foata normal form. 18/2078 useless extension candidates. Maximal degree in co-relation 9559. Up to 1479 conditions per place. [2024-06-27 19:18:42,816 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 104 selfloop transitions, 22 changer transitions 0/133 dead transitions. [2024-06-27 19:18:42,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 133 transitions, 1309 flow [2024-06-27 19:18:42,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:18:42,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:18:42,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-27 19:18:42,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-06-27 19:18:42,818 INFO L175 Difference]: Start difference. First operand has 101 places, 97 transitions, 865 flow. Second operand 6 states and 155 transitions. [2024-06-27 19:18:42,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 133 transitions, 1309 flow [2024-06-27 19:18:42,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 133 transitions, 1268 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:42,849 INFO L231 Difference]: Finished difference. Result has 104 places, 99 transitions, 906 flow [2024-06-27 19:18:42,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=906, PETRI_PLACES=104, PETRI_TRANSITIONS=99} [2024-06-27 19:18:42,849 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-27 19:18:42,850 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 99 transitions, 906 flow [2024-06-27 19:18:42,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:42,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:42,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:42,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 19:18:42,850 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)] === [2024-06-27 19:18:42,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:42,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1072504861, now seen corresponding path program 6 times [2024-06-27 19:18:42,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:42,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732054986] [2024-06-27 19:18:42,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:42,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:42,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:42,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:42,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:42,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732054986] [2024-06-27 19:18:42,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732054986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:42,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:42,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:42,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12082360] [2024-06-27 19:18:42,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:42,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:42,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:42,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:42,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:43,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:43,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 99 transitions, 906 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:43,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:43,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:43,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:43,292 INFO L124 PetriNetUnfolderBase]: 1197/2019 cut-off events. [2024-06-27 19:18:43,292 INFO L125 PetriNetUnfolderBase]: For 24237/24245 co-relation queries the response was YES. [2024-06-27 19:18:43,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9356 conditions, 2019 events. 1197/2019 cut-off events. For 24237/24245 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11080 event pairs, 338 based on Foata normal form. 24/2042 useless extension candidates. Maximal degree in co-relation 9305. Up to 1680 conditions per place. [2024-06-27 19:18:43,305 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 109 selfloop transitions, 21 changer transitions 0/137 dead transitions. [2024-06-27 19:18:43,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 137 transitions, 1292 flow [2024-06-27 19:18:43,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:18:43,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:18:43,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:18:43,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-27 19:18:43,307 INFO L175 Difference]: Start difference. First operand has 104 places, 99 transitions, 906 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:18:43,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 137 transitions, 1292 flow [2024-06-27 19:18:43,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 137 transitions, 1204 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 19:18:43,336 INFO L231 Difference]: Finished difference. Result has 107 places, 100 transitions, 887 flow [2024-06-27 19:18:43,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=887, PETRI_PLACES=107, PETRI_TRANSITIONS=100} [2024-06-27 19:18:43,337 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 66 predicate places. [2024-06-27 19:18:43,337 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 100 transitions, 887 flow [2024-06-27 19:18:43,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:43,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:43,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:43,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 19:18:43,337 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)] === [2024-06-27 19:18:43,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:43,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1072289659, now seen corresponding path program 1 times [2024-06-27 19:18:43,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:43,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657505798] [2024-06-27 19:18:43,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:43,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:43,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:43,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:43,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:43,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657505798] [2024-06-27 19:18:43,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657505798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:43,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:43,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:43,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786984739] [2024-06-27 19:18:43,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:43,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:43,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:43,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:43,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:43,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:43,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 100 transitions, 887 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:43,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:43,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:43,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:43,796 INFO L124 PetriNetUnfolderBase]: 1177/1987 cut-off events. [2024-06-27 19:18:43,796 INFO L125 PetriNetUnfolderBase]: For 22683/22691 co-relation queries the response was YES. [2024-06-27 19:18:43,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8887 conditions, 1987 events. 1177/1987 cut-off events. For 22683/22691 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 10866 event pairs, 285 based on Foata normal form. 20/2006 useless extension candidates. Maximal degree in co-relation 8836. Up to 1441 conditions per place. [2024-06-27 19:18:43,807 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 108 selfloop transitions, 25 changer transitions 0/140 dead transitions. [2024-06-27 19:18:43,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 140 transitions, 1237 flow [2024-06-27 19:18:43,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:18:43,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:18:43,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 19:18:43,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-27 19:18:43,809 INFO L175 Difference]: Start difference. First operand has 107 places, 100 transitions, 887 flow. Second operand 8 states and 193 transitions. [2024-06-27 19:18:43,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 140 transitions, 1237 flow [2024-06-27 19:18:43,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 140 transitions, 1196 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 19:18:43,838 INFO L231 Difference]: Finished difference. Result has 108 places, 99 transitions, 860 flow [2024-06-27 19:18:43,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=860, PETRI_PLACES=108, PETRI_TRANSITIONS=99} [2024-06-27 19:18:43,839 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-27 19:18:43,839 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 99 transitions, 860 flow [2024-06-27 19:18:43,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:43,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:43,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:43,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 19:18:43,839 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:43,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:43,840 INFO L85 PathProgramCache]: Analyzing trace with hash 819392194, now seen corresponding path program 1 times [2024-06-27 19:18:43,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:43,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044314459] [2024-06-27 19:18:43,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:43,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:43,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:43,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:43,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:43,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044314459] [2024-06-27 19:18:43,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044314459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:43,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:43,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:43,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083056968] [2024-06-27 19:18:43,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:43,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:18:43,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:43,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:18:43,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:18:43,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:43,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 99 transitions, 860 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:43,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:43,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:43,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:44,147 INFO L124 PetriNetUnfolderBase]: 1127/1917 cut-off events. [2024-06-27 19:18:44,147 INFO L125 PetriNetUnfolderBase]: For 22664/22667 co-relation queries the response was YES. [2024-06-27 19:18:44,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8743 conditions, 1917 events. 1127/1917 cut-off events. For 22664/22667 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 10535 event pairs, 308 based on Foata normal form. 5/1906 useless extension candidates. Maximal degree in co-relation 8691. Up to 1703 conditions per place. [2024-06-27 19:18:44,160 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 78 selfloop transitions, 19 changer transitions 0/110 dead transitions. [2024-06-27 19:18:44,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 110 transitions, 1096 flow [2024-06-27 19:18:44,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:18:44,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:18:44,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-27 19:18:44,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-27 19:18:44,162 INFO L175 Difference]: Start difference. First operand has 108 places, 99 transitions, 860 flow. Second operand 4 states and 99 transitions. [2024-06-27 19:18:44,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 110 transitions, 1096 flow [2024-06-27 19:18:44,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 110 transitions, 1026 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 19:18:44,199 INFO L231 Difference]: Finished difference. Result has 105 places, 102 transitions, 868 flow [2024-06-27 19:18:44,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=868, PETRI_PLACES=105, PETRI_TRANSITIONS=102} [2024-06-27 19:18:44,200 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 64 predicate places. [2024-06-27 19:18:44,200 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 102 transitions, 868 flow [2024-06-27 19:18:44,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:44,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:44,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:44,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 19:18:44,201 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:44,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:44,202 INFO L85 PathProgramCache]: Analyzing trace with hash -807621564, now seen corresponding path program 2 times [2024-06-27 19:18:44,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:44,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767823948] [2024-06-27 19:18:44,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:44,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:44,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:44,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:44,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:44,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767823948] [2024-06-27 19:18:44,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767823948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:44,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:44,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:44,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878661444] [2024-06-27 19:18:44,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:44,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:18:44,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:44,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:18:44,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:18:44,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:44,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 102 transitions, 868 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:44,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:44,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:44,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:44,494 INFO L124 PetriNetUnfolderBase]: 1121/1909 cut-off events. [2024-06-27 19:18:44,494 INFO L125 PetriNetUnfolderBase]: For 23506/23509 co-relation queries the response was YES. [2024-06-27 19:18:44,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8694 conditions, 1909 events. 1121/1909 cut-off events. For 23506/23509 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 10518 event pairs, 308 based on Foata normal form. 5/1898 useless extension candidates. Maximal degree in co-relation 8642. Up to 1690 conditions per place. [2024-06-27 19:18:44,508 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 79 selfloop transitions, 22 changer transitions 0/114 dead transitions. [2024-06-27 19:18:44,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 114 transitions, 1120 flow [2024-06-27 19:18:44,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:44,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:44,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-27 19:18:44,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-27 19:18:44,510 INFO L175 Difference]: Start difference. First operand has 105 places, 102 transitions, 868 flow. Second operand 5 states and 118 transitions. [2024-06-27 19:18:44,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 114 transitions, 1120 flow [2024-06-27 19:18:44,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 114 transitions, 1070 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 19:18:44,547 INFO L231 Difference]: Finished difference. Result has 108 places, 105 transitions, 902 flow [2024-06-27 19:18:44,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=902, PETRI_PLACES=108, PETRI_TRANSITIONS=105} [2024-06-27 19:18:44,548 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-27 19:18:44,548 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 105 transitions, 902 flow [2024-06-27 19:18:44,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:44,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:44,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:44,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 19:18:44,549 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:44,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:44,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1154175532, now seen corresponding path program 1 times [2024-06-27 19:18:44,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:44,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564719521] [2024-06-27 19:18:44,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:44,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:44,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:44,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:44,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:44,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564719521] [2024-06-27 19:18:44,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564719521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:44,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:44,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:44,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524021240] [2024-06-27 19:18:44,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:44,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:18:44,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:44,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:18:44,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:18:44,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:44,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 105 transitions, 902 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:44,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:44,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:44,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:44,877 INFO L124 PetriNetUnfolderBase]: 1109/1923 cut-off events. [2024-06-27 19:18:44,877 INFO L125 PetriNetUnfolderBase]: For 23992/23994 co-relation queries the response was YES. [2024-06-27 19:18:44,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8831 conditions, 1923 events. 1109/1923 cut-off events. For 23992/23994 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10768 event pairs, 306 based on Foata normal form. 4/1925 useless extension candidates. Maximal degree in co-relation 8778. Up to 1700 conditions per place. [2024-06-27 19:18:44,887 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 92 selfloop transitions, 22 changer transitions 0/124 dead transitions. [2024-06-27 19:18:44,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 124 transitions, 1266 flow [2024-06-27 19:18:44,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:44,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:44,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-27 19:18:44,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-06-27 19:18:44,889 INFO L175 Difference]: Start difference. First operand has 108 places, 105 transitions, 902 flow. Second operand 5 states and 122 transitions. [2024-06-27 19:18:44,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 124 transitions, 1266 flow [2024-06-27 19:18:44,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 124 transitions, 1208 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:44,927 INFO L231 Difference]: Finished difference. Result has 110 places, 111 transitions, 960 flow [2024-06-27 19:18:44,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=960, PETRI_PLACES=110, PETRI_TRANSITIONS=111} [2024-06-27 19:18:44,927 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2024-06-27 19:18:44,928 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 111 transitions, 960 flow [2024-06-27 19:18:44,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:44,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:44,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:44,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 19:18:44,928 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:44,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:44,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1025374060, now seen corresponding path program 2 times [2024-06-27 19:18:44,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:44,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765988833] [2024-06-27 19:18:44,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:44,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:44,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:45,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:45,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:45,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765988833] [2024-06-27 19:18:45,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765988833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:45,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:45,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:45,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777155439] [2024-06-27 19:18:45,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:45,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:18:45,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:45,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:18:45,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:18:45,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:45,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 111 transitions, 960 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:45,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:45,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:45,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:45,246 INFO L124 PetriNetUnfolderBase]: 1104/1916 cut-off events. [2024-06-27 19:18:45,247 INFO L125 PetriNetUnfolderBase]: For 25924/25926 co-relation queries the response was YES. [2024-06-27 19:18:45,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9032 conditions, 1916 events. 1104/1916 cut-off events. For 25924/25926 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 10727 event pairs, 306 based on Foata normal form. 4/1918 useless extension candidates. Maximal degree in co-relation 8978. Up to 1701 conditions per place. [2024-06-27 19:18:45,261 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 93 selfloop transitions, 19 changer transitions 0/122 dead transitions. [2024-06-27 19:18:45,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 122 transitions, 1212 flow [2024-06-27 19:18:45,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:18:45,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:18:45,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-27 19:18:45,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-27 19:18:45,263 INFO L175 Difference]: Start difference. First operand has 110 places, 111 transitions, 960 flow. Second operand 4 states and 102 transitions. [2024-06-27 19:18:45,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 122 transitions, 1212 flow [2024-06-27 19:18:45,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 122 transitions, 1157 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-27 19:18:45,307 INFO L231 Difference]: Finished difference. Result has 113 places, 111 transitions, 955 flow [2024-06-27 19:18:45,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=905, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=955, PETRI_PLACES=113, PETRI_TRANSITIONS=111} [2024-06-27 19:18:45,307 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 72 predicate places. [2024-06-27 19:18:45,307 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 111 transitions, 955 flow [2024-06-27 19:18:45,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:45,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:45,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:45,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 19:18:45,308 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:45,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:45,309 INFO L85 PathProgramCache]: Analyzing trace with hash -807606684, now seen corresponding path program 1 times [2024-06-27 19:18:45,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:45,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562008540] [2024-06-27 19:18:45,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:45,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:45,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:45,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:45,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562008540] [2024-06-27 19:18:45,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562008540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:45,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:45,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:45,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757265687] [2024-06-27 19:18:45,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:45,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:18:45,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:45,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:18:45,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:18:45,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:45,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 111 transitions, 955 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:45,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:45,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:45,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:45,634 INFO L124 PetriNetUnfolderBase]: 1111/1911 cut-off events. [2024-06-27 19:18:45,635 INFO L125 PetriNetUnfolderBase]: For 27513/27518 co-relation queries the response was YES. [2024-06-27 19:18:45,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8990 conditions, 1911 events. 1111/1911 cut-off events. For 27513/27518 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 10598 event pairs, 292 based on Foata normal form. 7/1904 useless extension candidates. Maximal degree in co-relation 8934. Up to 1704 conditions per place. [2024-06-27 19:18:45,650 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 100 selfloop transitions, 11 changer transitions 0/124 dead transitions. [2024-06-27 19:18:45,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 124 transitions, 1222 flow [2024-06-27 19:18:45,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:45,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:45,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-27 19:18:45,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-06-27 19:18:45,651 INFO L175 Difference]: Start difference. First operand has 113 places, 111 transitions, 955 flow. Second operand 5 states and 116 transitions. [2024-06-27 19:18:45,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 124 transitions, 1222 flow [2024-06-27 19:18:45,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 124 transitions, 1184 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:45,693 INFO L231 Difference]: Finished difference. Result has 115 places, 113 transitions, 964 flow [2024-06-27 19:18:45,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=917, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=964, PETRI_PLACES=115, PETRI_TRANSITIONS=113} [2024-06-27 19:18:45,694 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 74 predicate places. [2024-06-27 19:18:45,694 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 113 transitions, 964 flow [2024-06-27 19:18:45,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:45,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:45,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:45,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 19:18:45,694 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:45,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:45,695 INFO L85 PathProgramCache]: Analyzing trace with hash 212333482, now seen corresponding path program 1 times [2024-06-27 19:18:45,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:45,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045575216] [2024-06-27 19:18:45,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:45,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:45,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:45,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:45,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045575216] [2024-06-27 19:18:45,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045575216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:45,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:45,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:45,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280199004] [2024-06-27 19:18:45,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:45,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:45,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:45,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:45,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:45,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:45,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 113 transitions, 964 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:45,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:45,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:45,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:46,062 INFO L124 PetriNetUnfolderBase]: 1193/2031 cut-off events. [2024-06-27 19:18:46,063 INFO L125 PetriNetUnfolderBase]: For 28911/28917 co-relation queries the response was YES. [2024-06-27 19:18:46,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9645 conditions, 2031 events. 1193/2031 cut-off events. For 28911/28917 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11247 event pairs, 308 based on Foata normal form. 7/2037 useless extension candidates. Maximal degree in co-relation 9588. Up to 1807 conditions per place. [2024-06-27 19:18:46,074 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 116 selfloop transitions, 26 changer transitions 0/149 dead transitions. [2024-06-27 19:18:46,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 149 transitions, 1473 flow [2024-06-27 19:18:46,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:18:46,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:18:46,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-27 19:18:46,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-27 19:18:46,075 INFO L175 Difference]: Start difference. First operand has 115 places, 113 transitions, 964 flow. Second operand 8 states and 176 transitions. [2024-06-27 19:18:46,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 149 transitions, 1473 flow [2024-06-27 19:18:46,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 149 transitions, 1437 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:46,117 INFO L231 Difference]: Finished difference. Result has 122 places, 128 transitions, 1136 flow [2024-06-27 19:18:46,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1136, PETRI_PLACES=122, PETRI_TRANSITIONS=128} [2024-06-27 19:18:46,117 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-27 19:18:46,118 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 128 transitions, 1136 flow [2024-06-27 19:18:46,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:46,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:46,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:46,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 19:18:46,118 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:46,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:46,119 INFO L85 PathProgramCache]: Analyzing trace with hash -326650804, now seen corresponding path program 2 times [2024-06-27 19:18:46,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:46,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937163637] [2024-06-27 19:18:46,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:46,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:46,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:46,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:46,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:46,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937163637] [2024-06-27 19:18:46,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937163637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:46,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:46,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:46,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862481958] [2024-06-27 19:18:46,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:46,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:46,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:46,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:46,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:46,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:46,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 128 transitions, 1136 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:46,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:46,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:46,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:46,465 INFO L124 PetriNetUnfolderBase]: 1198/2040 cut-off events. [2024-06-27 19:18:46,466 INFO L125 PetriNetUnfolderBase]: For 31674/31682 co-relation queries the response was YES. [2024-06-27 19:18:46,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10018 conditions, 2040 events. 1198/2040 cut-off events. For 31674/31682 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11317 event pairs, 308 based on Foata normal form. 9/2048 useless extension candidates. Maximal degree in co-relation 9958. Up to 1813 conditions per place. [2024-06-27 19:18:46,480 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 116 selfloop transitions, 28 changer transitions 0/151 dead transitions. [2024-06-27 19:18:46,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 151 transitions, 1556 flow [2024-06-27 19:18:46,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:46,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:46,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-27 19:18:46,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2024-06-27 19:18:46,481 INFO L175 Difference]: Start difference. First operand has 122 places, 128 transitions, 1136 flow. Second operand 7 states and 158 transitions. [2024-06-27 19:18:46,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 151 transitions, 1556 flow [2024-06-27 19:18:46,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 151 transitions, 1492 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:46,526 INFO L231 Difference]: Finished difference. Result has 126 places, 131 transitions, 1164 flow [2024-06-27 19:18:46,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1078, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1164, PETRI_PLACES=126, PETRI_TRANSITIONS=131} [2024-06-27 19:18:46,527 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-06-27 19:18:46,527 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 131 transitions, 1164 flow [2024-06-27 19:18:46,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:46,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:46,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:46,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 19:18:46,528 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:46,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:46,528 INFO L85 PathProgramCache]: Analyzing trace with hash -326639644, now seen corresponding path program 3 times [2024-06-27 19:18:46,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:46,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646592723] [2024-06-27 19:18:46,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:46,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:46,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:46,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:46,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646592723] [2024-06-27 19:18:46,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646592723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:46,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:46,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:46,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727887687] [2024-06-27 19:18:46,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:46,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:46,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:46,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:46,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:46,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:46,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 131 transitions, 1164 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:46,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:46,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:46,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:46,943 INFO L124 PetriNetUnfolderBase]: 1195/2033 cut-off events. [2024-06-27 19:18:46,943 INFO L125 PetriNetUnfolderBase]: For 33476/33480 co-relation queries the response was YES. [2024-06-27 19:18:46,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10017 conditions, 2033 events. 1195/2033 cut-off events. For 33476/33480 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11237 event pairs, 317 based on Foata normal form. 2/2033 useless extension candidates. Maximal degree in co-relation 9956. Up to 1810 conditions per place. [2024-06-27 19:18:46,959 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 109 selfloop transitions, 26 changer transitions 0/142 dead transitions. [2024-06-27 19:18:46,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 142 transitions, 1466 flow [2024-06-27 19:18:46,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:46,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:46,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-27 19:18:46,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-06-27 19:18:46,961 INFO L175 Difference]: Start difference. First operand has 126 places, 131 transitions, 1164 flow. Second operand 5 states and 116 transitions. [2024-06-27 19:18:46,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 142 transitions, 1466 flow [2024-06-27 19:18:47,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 142 transitions, 1400 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 19:18:47,024 INFO L231 Difference]: Finished difference. Result has 126 places, 131 transitions, 1156 flow [2024-06-27 19:18:47,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1156, PETRI_PLACES=126, PETRI_TRANSITIONS=131} [2024-06-27 19:18:47,025 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-06-27 19:18:47,025 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 131 transitions, 1156 flow [2024-06-27 19:18:47,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:47,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:47,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:47,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 19:18:47,026 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:47,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:47,026 INFO L85 PathProgramCache]: Analyzing trace with hash 733536100, now seen corresponding path program 4 times [2024-06-27 19:18:47,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:47,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721293710] [2024-06-27 19:18:47,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:47,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:47,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:47,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:47,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:47,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721293710] [2024-06-27 19:18:47,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721293710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:47,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:47,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:47,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230777103] [2024-06-27 19:18:47,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:47,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:47,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:47,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:47,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:47,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:47,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 131 transitions, 1156 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:47,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:47,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:47,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:47,380 INFO L124 PetriNetUnfolderBase]: 1192/2016 cut-off events. [2024-06-27 19:18:47,380 INFO L125 PetriNetUnfolderBase]: For 32881/32885 co-relation queries the response was YES. [2024-06-27 19:18:47,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9940 conditions, 2016 events. 1192/2016 cut-off events. For 32881/32885 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11036 event pairs, 317 based on Foata normal form. 2/2016 useless extension candidates. Maximal degree in co-relation 9879. Up to 1800 conditions per place. [2024-06-27 19:18:47,393 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 111 selfloop transitions, 31 changer transitions 0/149 dead transitions. [2024-06-27 19:18:47,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 149 transitions, 1512 flow [2024-06-27 19:18:47,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:18:47,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:18:47,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-27 19:18:47,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-27 19:18:47,394 INFO L175 Difference]: Start difference. First operand has 126 places, 131 transitions, 1156 flow. Second operand 6 states and 134 transitions. [2024-06-27 19:18:47,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 149 transitions, 1512 flow [2024-06-27 19:18:47,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 149 transitions, 1460 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:47,447 INFO L231 Difference]: Finished difference. Result has 129 places, 137 transitions, 1224 flow [2024-06-27 19:18:47,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1104, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1224, PETRI_PLACES=129, PETRI_TRANSITIONS=137} [2024-06-27 19:18:47,448 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 88 predicate places. [2024-06-27 19:18:47,448 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 137 transitions, 1224 flow [2024-06-27 19:18:47,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:47,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:47,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:47,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 19:18:47,449 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:47,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:47,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1419704304, now seen corresponding path program 1 times [2024-06-27 19:18:47,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:47,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655205435] [2024-06-27 19:18:47,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:47,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:47,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:47,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:47,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:47,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655205435] [2024-06-27 19:18:47,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655205435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:47,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:47,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:47,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795599569] [2024-06-27 19:18:47,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:47,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:47,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:47,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:47,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:47,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:47,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 137 transitions, 1224 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:47,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:47,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:47,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:47,773 INFO L124 PetriNetUnfolderBase]: 1197/2027 cut-off events. [2024-06-27 19:18:47,774 INFO L125 PetriNetUnfolderBase]: For 34929/34931 co-relation queries the response was YES. [2024-06-27 19:18:47,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10268 conditions, 2027 events. 1197/2027 cut-off events. For 34929/34931 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11114 event pairs, 306 based on Foata normal form. 3/2029 useless extension candidates. Maximal degree in co-relation 10205. Up to 1823 conditions per place. [2024-06-27 19:18:47,786 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 139 selfloop transitions, 21 changer transitions 0/167 dead transitions. [2024-06-27 19:18:47,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 167 transitions, 1750 flow [2024-06-27 19:18:47,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:18:47,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:18:47,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-27 19:18:47,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 19:18:47,788 INFO L175 Difference]: Start difference. First operand has 129 places, 137 transitions, 1224 flow. Second operand 6 states and 138 transitions. [2024-06-27 19:18:47,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 167 transitions, 1750 flow [2024-06-27 19:18:47,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 167 transitions, 1697 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 19:18:47,842 INFO L231 Difference]: Finished difference. Result has 135 places, 149 transitions, 1342 flow [2024-06-27 19:18:47,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1342, PETRI_PLACES=135, PETRI_TRANSITIONS=149} [2024-06-27 19:18:47,843 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 94 predicate places. [2024-06-27 19:18:47,843 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 149 transitions, 1342 flow [2024-06-27 19:18:47,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:47,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:47,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:47,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 19:18:47,844 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)] === [2024-06-27 19:18:47,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:47,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1721831548, now seen corresponding path program 2 times [2024-06-27 19:18:47,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:47,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93880472] [2024-06-27 19:18:47,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:47,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:47,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:47,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:47,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93880472] [2024-06-27 19:18:47,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93880472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:47,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:47,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:47,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368493544] [2024-06-27 19:18:47,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:47,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:47,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:47,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:47,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:47,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:47,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 149 transitions, 1342 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:47,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:47,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:47,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:48,213 INFO L124 PetriNetUnfolderBase]: 1202/2036 cut-off events. [2024-06-27 19:18:48,214 INFO L125 PetriNetUnfolderBase]: For 37822/37826 co-relation queries the response was YES. [2024-06-27 19:18:48,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10696 conditions, 2036 events. 1202/2036 cut-off events. For 37822/37826 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11208 event pairs, 304 based on Foata normal form. 5/2040 useless extension candidates. Maximal degree in co-relation 10629. Up to 1835 conditions per place. [2024-06-27 19:18:48,227 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 143 selfloop transitions, 22 changer transitions 0/172 dead transitions. [2024-06-27 19:18:48,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 172 transitions, 1830 flow [2024-06-27 19:18:48,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:48,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:48,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-27 19:18:48,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-27 19:18:48,229 INFO L175 Difference]: Start difference. First operand has 135 places, 149 transitions, 1342 flow. Second operand 7 states and 155 transitions. [2024-06-27 19:18:48,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 172 transitions, 1830 flow [2024-06-27 19:18:48,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 172 transitions, 1778 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-27 19:18:48,309 INFO L231 Difference]: Finished difference. Result has 141 places, 154 transitions, 1396 flow [2024-06-27 19:18:48,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1296, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1396, PETRI_PLACES=141, PETRI_TRANSITIONS=154} [2024-06-27 19:18:48,310 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2024-06-27 19:18:48,310 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 154 transitions, 1396 flow [2024-06-27 19:18:48,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:48,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:48,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:48,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 19:18:48,311 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)] === [2024-06-27 19:18:48,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:48,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1721825968, now seen corresponding path program 3 times [2024-06-27 19:18:48,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:48,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063680532] [2024-06-27 19:18:48,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:48,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:48,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:48,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:48,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:48,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063680532] [2024-06-27 19:18:48,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063680532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:48,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:48,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:48,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912241146] [2024-06-27 19:18:48,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:48,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:48,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:48,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:48,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:48,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:48,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 154 transitions, 1396 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:48,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:48,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:48,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:48,675 INFO L124 PetriNetUnfolderBase]: 1199/2032 cut-off events. [2024-06-27 19:18:48,675 INFO L125 PetriNetUnfolderBase]: For 39693/39697 co-relation queries the response was YES. [2024-06-27 19:18:48,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10707 conditions, 2032 events. 1199/2032 cut-off events. For 39693/39697 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11172 event pairs, 306 based on Foata normal form. 5/2036 useless extension candidates. Maximal degree in co-relation 10638. Up to 1832 conditions per place. [2024-06-27 19:18:48,689 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 142 selfloop transitions, 20 changer transitions 0/169 dead transitions. [2024-06-27 19:18:48,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 169 transitions, 1767 flow [2024-06-27 19:18:48,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:48,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:48,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-27 19:18:48,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595 [2024-06-27 19:18:48,691 INFO L175 Difference]: Start difference. First operand has 141 places, 154 transitions, 1396 flow. Second operand 5 states and 119 transitions. [2024-06-27 19:18:48,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 169 transitions, 1767 flow [2024-06-27 19:18:48,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 169 transitions, 1695 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:48,752 INFO L231 Difference]: Finished difference. Result has 142 places, 154 transitions, 1370 flow [2024-06-27 19:18:48,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1324, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1370, PETRI_PLACES=142, PETRI_TRANSITIONS=154} [2024-06-27 19:18:48,752 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 101 predicate places. [2024-06-27 19:18:48,752 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 154 transitions, 1370 flow [2024-06-27 19:18:48,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:48,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:48,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:48,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 19:18:48,753 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)] === [2024-06-27 19:18:48,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:48,753 INFO L85 PathProgramCache]: Analyzing trace with hash 865299045, now seen corresponding path program 1 times [2024-06-27 19:18:48,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:48,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312314933] [2024-06-27 19:18:48,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:48,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:48,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:48,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:48,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312314933] [2024-06-27 19:18:48,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312314933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:48,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:48,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:48,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046939768] [2024-06-27 19:18:48,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:48,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:48,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:48,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:48,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:48,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:48,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 154 transitions, 1370 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:48,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:48,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:48,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:49,169 INFO L124 PetriNetUnfolderBase]: 1165/1985 cut-off events. [2024-06-27 19:18:49,170 INFO L125 PetriNetUnfolderBase]: For 43624/43629 co-relation queries the response was YES. [2024-06-27 19:18:49,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10548 conditions, 1985 events. 1165/1985 cut-off events. For 43624/43629 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11019 event pairs, 302 based on Foata normal form. 9/1978 useless extension candidates. Maximal degree in co-relation 10478. Up to 1713 conditions per place. [2024-06-27 19:18:49,182 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 119 selfloop transitions, 27 changer transitions 0/166 dead transitions. [2024-06-27 19:18:49,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 166 transitions, 1714 flow [2024-06-27 19:18:49,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:49,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:49,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-27 19:18:49,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595 [2024-06-27 19:18:49,184 INFO L175 Difference]: Start difference. First operand has 142 places, 154 transitions, 1370 flow. Second operand 5 states and 119 transitions. [2024-06-27 19:18:49,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 166 transitions, 1714 flow [2024-06-27 19:18:49,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 166 transitions, 1674 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:49,258 INFO L231 Difference]: Finished difference. Result has 143 places, 156 transitions, 1426 flow [2024-06-27 19:18:49,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1426, PETRI_PLACES=143, PETRI_TRANSITIONS=156} [2024-06-27 19:18:49,258 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 102 predicate places. [2024-06-27 19:18:49,258 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 156 transitions, 1426 flow [2024-06-27 19:18:49,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:49,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:49,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:49,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 19:18:49,259 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)] === [2024-06-27 19:18:49,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:49,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1264796355, now seen corresponding path program 2 times [2024-06-27 19:18:49,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:49,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299723789] [2024-06-27 19:18:49,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:49,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:49,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:49,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:49,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:49,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299723789] [2024-06-27 19:18:49,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299723789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:49,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:49,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:49,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926467401] [2024-06-27 19:18:49,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:49,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:49,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:49,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:49,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:49,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:49,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 156 transitions, 1426 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:49,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:49,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:49,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:49,620 INFO L124 PetriNetUnfolderBase]: 1177/2005 cut-off events. [2024-06-27 19:18:49,620 INFO L125 PetriNetUnfolderBase]: For 46673/46678 co-relation queries the response was YES. [2024-06-27 19:18:49,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10879 conditions, 2005 events. 1177/2005 cut-off events. For 46673/46678 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11120 event pairs, 306 based on Foata normal form. 9/1998 useless extension candidates. Maximal degree in co-relation 10808. Up to 1739 conditions per place. [2024-06-27 19:18:49,633 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 119 selfloop transitions, 30 changer transitions 0/169 dead transitions. [2024-06-27 19:18:49,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 169 transitions, 1782 flow [2024-06-27 19:18:49,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:18:49,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:18:49,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-27 19:18:49,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2024-06-27 19:18:49,634 INFO L175 Difference]: Start difference. First operand has 143 places, 156 transitions, 1426 flow. Second operand 6 states and 137 transitions. [2024-06-27 19:18:49,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 169 transitions, 1782 flow [2024-06-27 19:18:49,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 169 transitions, 1714 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:49,717 INFO L231 Difference]: Finished difference. Result has 146 places, 158 transitions, 1460 flow [2024-06-27 19:18:49,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1358, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1460, PETRI_PLACES=146, PETRI_TRANSITIONS=158} [2024-06-27 19:18:49,717 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 105 predicate places. [2024-06-27 19:18:49,717 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 158 transitions, 1460 flow [2024-06-27 19:18:49,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:49,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:49,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:49,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 19:18:49,718 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)] === [2024-06-27 19:18:49,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:49,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1279081155, now seen corresponding path program 3 times [2024-06-27 19:18:49,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:49,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593475546] [2024-06-27 19:18:49,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:49,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:49,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:49,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:49,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:49,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593475546] [2024-06-27 19:18:49,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593475546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:49,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:49,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:49,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964448220] [2024-06-27 19:18:49,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:49,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:49,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:49,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:49,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:49,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:49,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 158 transitions, 1460 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:49,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:49,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:49,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:50,092 INFO L124 PetriNetUnfolderBase]: 1167/1991 cut-off events. [2024-06-27 19:18:50,092 INFO L125 PetriNetUnfolderBase]: For 47210/47215 co-relation queries the response was YES. [2024-06-27 19:18:50,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10774 conditions, 1991 events. 1167/1991 cut-off events. For 47210/47215 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11058 event pairs, 300 based on Foata normal form. 9/1984 useless extension candidates. Maximal degree in co-relation 10702. Up to 1687 conditions per place. [2024-06-27 19:18:50,105 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 118 selfloop transitions, 34 changer transitions 0/172 dead transitions. [2024-06-27 19:18:50,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 172 transitions, 1828 flow [2024-06-27 19:18:50,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:18:50,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:18:50,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-27 19:18:50,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 19:18:50,106 INFO L175 Difference]: Start difference. First operand has 146 places, 158 transitions, 1460 flow. Second operand 6 states and 138 transitions. [2024-06-27 19:18:50,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 172 transitions, 1828 flow [2024-06-27 19:18:50,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 172 transitions, 1744 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:50,186 INFO L231 Difference]: Finished difference. Result has 148 places, 160 transitions, 1489 flow [2024-06-27 19:18:50,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1376, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1489, PETRI_PLACES=148, PETRI_TRANSITIONS=160} [2024-06-27 19:18:50,187 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 107 predicate places. [2024-06-27 19:18:50,187 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 160 transitions, 1489 flow [2024-06-27 19:18:50,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:50,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:50,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:50,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 19:18:50,187 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)] === [2024-06-27 19:18:50,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:50,188 INFO L85 PathProgramCache]: Analyzing trace with hash -436841749, now seen corresponding path program 1 times [2024-06-27 19:18:50,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:50,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564415305] [2024-06-27 19:18:50,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:50,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:50,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:50,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:50,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:50,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564415305] [2024-06-27 19:18:50,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564415305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:50,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:50,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:50,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946131273] [2024-06-27 19:18:50,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:50,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:50,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:50,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:50,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:50,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:50,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 160 transitions, 1489 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:50,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:50,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:50,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:50,567 INFO L124 PetriNetUnfolderBase]: 1178/2011 cut-off events. [2024-06-27 19:18:50,567 INFO L125 PetriNetUnfolderBase]: For 50406/50410 co-relation queries the response was YES. [2024-06-27 19:18:50,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11025 conditions, 2011 events. 1178/2011 cut-off events. For 50406/50410 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 11216 event pairs, 261 based on Foata normal form. 8/2011 useless extension candidates. Maximal degree in co-relation 10952. Up to 1686 conditions per place. [2024-06-27 19:18:50,581 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 134 selfloop transitions, 32 changer transitions 0/183 dead transitions. [2024-06-27 19:18:50,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 183 transitions, 2003 flow [2024-06-27 19:18:50,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:18:50,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:18:50,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 19:18:50,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-27 19:18:50,582 INFO L175 Difference]: Start difference. First operand has 148 places, 160 transitions, 1489 flow. Second operand 6 states and 145 transitions. [2024-06-27 19:18:50,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 183 transitions, 2003 flow [2024-06-27 19:18:50,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 183 transitions, 1906 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:50,651 INFO L231 Difference]: Finished difference. Result has 150 places, 164 transitions, 1533 flow [2024-06-27 19:18:50,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1392, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1533, PETRI_PLACES=150, PETRI_TRANSITIONS=164} [2024-06-27 19:18:50,652 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2024-06-27 19:18:50,652 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 164 transitions, 1533 flow [2024-06-27 19:18:50,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:50,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:50,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:50,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 19:18:50,652 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:50,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:50,653 INFO L85 PathProgramCache]: Analyzing trace with hash -436781299, now seen corresponding path program 2 times [2024-06-27 19:18:50,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:50,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063937275] [2024-06-27 19:18:50,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:50,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:50,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:50,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:50,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:50,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063937275] [2024-06-27 19:18:50,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063937275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:50,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:50,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:50,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993605118] [2024-06-27 19:18:50,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:50,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:50,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:50,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:50,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:50,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:50,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 164 transitions, 1533 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:50,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:50,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:50,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:51,059 INFO L124 PetriNetUnfolderBase]: 1192/2033 cut-off events. [2024-06-27 19:18:51,059 INFO L125 PetriNetUnfolderBase]: For 53248/53252 co-relation queries the response was YES. [2024-06-27 19:18:51,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11229 conditions, 2033 events. 1192/2033 cut-off events. For 53248/53252 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 11352 event pairs, 298 based on Foata normal form. 8/2033 useless extension candidates. Maximal degree in co-relation 11155. Up to 1768 conditions per place. [2024-06-27 19:18:51,074 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 133 selfloop transitions, 30 changer transitions 0/180 dead transitions. [2024-06-27 19:18:51,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 180 transitions, 1931 flow [2024-06-27 19:18:51,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:18:51,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:18:51,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-27 19:18:51,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-27 19:18:51,075 INFO L175 Difference]: Start difference. First operand has 150 places, 164 transitions, 1533 flow. Second operand 6 states and 140 transitions. [2024-06-27 19:18:51,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 180 transitions, 1931 flow [2024-06-27 19:18:51,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 180 transitions, 1855 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-27 19:18:51,174 INFO L231 Difference]: Finished difference. Result has 154 places, 166 transitions, 1565 flow [2024-06-27 19:18:51,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1465, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1565, PETRI_PLACES=154, PETRI_TRANSITIONS=166} [2024-06-27 19:18:51,174 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-27 19:18:51,174 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 166 transitions, 1565 flow [2024-06-27 19:18:51,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:51,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:51,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:51,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 19:18:51,175 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)] === [2024-06-27 19:18:51,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:51,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1836993707, now seen corresponding path program 3 times [2024-06-27 19:18:51,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:51,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388563441] [2024-06-27 19:18:51,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:51,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:51,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:51,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:51,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388563441] [2024-06-27 19:18:51,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388563441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:51,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:51,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:51,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036624831] [2024-06-27 19:18:51,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:51,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:51,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:51,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:51,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:51,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:51,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 166 transitions, 1565 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:51,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:51,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:51,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:51,578 INFO L124 PetriNetUnfolderBase]: 1182/2019 cut-off events. [2024-06-27 19:18:51,578 INFO L125 PetriNetUnfolderBase]: For 53369/53373 co-relation queries the response was YES. [2024-06-27 19:18:51,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11043 conditions, 2019 events. 1182/2019 cut-off events. For 53369/53373 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 11294 event pairs, 259 based on Foata normal form. 8/2019 useless extension candidates. Maximal degree in co-relation 10967. Up to 1726 conditions per place. [2024-06-27 19:18:51,590 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 138 selfloop transitions, 27 changer transitions 0/182 dead transitions. [2024-06-27 19:18:51,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 182 transitions, 1935 flow [2024-06-27 19:18:51,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:51,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:51,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-27 19:18:51,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 19:18:51,591 INFO L175 Difference]: Start difference. First operand has 154 places, 166 transitions, 1565 flow. Second operand 5 states and 125 transitions. [2024-06-27 19:18:51,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 182 transitions, 1935 flow [2024-06-27 19:18:51,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 182 transitions, 1837 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:51,669 INFO L231 Difference]: Finished difference. Result has 155 places, 166 transitions, 1531 flow [2024-06-27 19:18:51,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1467, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1531, PETRI_PLACES=155, PETRI_TRANSITIONS=166} [2024-06-27 19:18:51,671 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 114 predicate places. [2024-06-27 19:18:51,671 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 166 transitions, 1531 flow [2024-06-27 19:18:51,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:51,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:51,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:51,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 19:18:51,672 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)] === [2024-06-27 19:18:51,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:51,672 INFO L85 PathProgramCache]: Analyzing trace with hash -154294055, now seen corresponding path program 1 times [2024-06-27 19:18:51,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:51,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246540704] [2024-06-27 19:18:51,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:51,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:51,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:51,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:51,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:51,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246540704] [2024-06-27 19:18:51,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246540704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:51,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:51,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:51,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279319315] [2024-06-27 19:18:51,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:51,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:51,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:51,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:51,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:51,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:51,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 166 transitions, 1531 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:51,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:51,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:51,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:52,089 INFO L124 PetriNetUnfolderBase]: 1256/2130 cut-off events. [2024-06-27 19:18:52,089 INFO L125 PetriNetUnfolderBase]: For 54741/54749 co-relation queries the response was YES. [2024-06-27 19:18:52,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11559 conditions, 2130 events. 1256/2130 cut-off events. For 54741/54749 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 11851 event pairs, 335 based on Foata normal form. 9/2137 useless extension candidates. Maximal degree in co-relation 11482. Up to 1767 conditions per place. [2024-06-27 19:18:52,106 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 139 selfloop transitions, 54 changer transitions 0/200 dead transitions. [2024-06-27 19:18:52,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 200 transitions, 2241 flow [2024-06-27 19:18:52,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:52,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:52,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 19:18:52,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-27 19:18:52,108 INFO L175 Difference]: Start difference. First operand has 155 places, 166 transitions, 1531 flow. Second operand 7 states and 170 transitions. [2024-06-27 19:18:52,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 200 transitions, 2241 flow [2024-06-27 19:18:52,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 200 transitions, 2179 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:52,203 INFO L231 Difference]: Finished difference. Result has 158 places, 175 transitions, 1703 flow [2024-06-27 19:18:52,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1469, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1703, PETRI_PLACES=158, PETRI_TRANSITIONS=175} [2024-06-27 19:18:52,203 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 117 predicate places. [2024-06-27 19:18:52,203 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 175 transitions, 1703 flow [2024-06-27 19:18:52,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:52,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:52,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:52,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 19:18:52,204 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:52,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:52,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1033448141, now seen corresponding path program 1 times [2024-06-27 19:18:52,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:52,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335207904] [2024-06-27 19:18:52,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:52,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:52,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:52,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335207904] [2024-06-27 19:18:52,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335207904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:52,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:52,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:52,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050413213] [2024-06-27 19:18:52,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:52,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:52,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:52,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:52,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:52,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:52,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 175 transitions, 1703 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:52,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:52,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:52,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:52,666 INFO L124 PetriNetUnfolderBase]: 1282/2171 cut-off events. [2024-06-27 19:18:52,666 INFO L125 PetriNetUnfolderBase]: For 60122/60134 co-relation queries the response was YES. [2024-06-27 19:18:52,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12250 conditions, 2171 events. 1282/2171 cut-off events. For 60122/60134 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 12111 event pairs, 322 based on Foata normal form. 13/2183 useless extension candidates. Maximal degree in co-relation 12172. Up to 1843 conditions per place. [2024-06-27 19:18:52,682 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 142 selfloop transitions, 63 changer transitions 0/212 dead transitions. [2024-06-27 19:18:52,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 212 transitions, 2492 flow [2024-06-27 19:18:52,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:18:52,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:18:52,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-27 19:18:52,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5525 [2024-06-27 19:18:52,693 INFO L175 Difference]: Start difference. First operand has 158 places, 175 transitions, 1703 flow. Second operand 10 states and 221 transitions. [2024-06-27 19:18:52,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 212 transitions, 2492 flow [2024-06-27 19:18:52,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 212 transitions, 2403 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-27 19:18:52,795 INFO L231 Difference]: Finished difference. Result has 166 places, 187 transitions, 1919 flow [2024-06-27 19:18:52,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1617, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1919, PETRI_PLACES=166, PETRI_TRANSITIONS=187} [2024-06-27 19:18:52,796 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-27 19:18:52,796 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 187 transitions, 1919 flow [2024-06-27 19:18:52,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:52,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:52,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:52,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 19:18:52,796 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:52,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:52,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1033447955, now seen corresponding path program 2 times [2024-06-27 19:18:52,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:52,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590853315] [2024-06-27 19:18:52,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:52,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:52,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:52,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:52,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:52,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590853315] [2024-06-27 19:18:52,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590853315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:52,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:52,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:52,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655705492] [2024-06-27 19:18:52,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:52,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:52,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:52,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:52,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:52,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:52,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 187 transitions, 1919 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:52,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:52,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:52,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:53,266 INFO L124 PetriNetUnfolderBase]: 1287/2180 cut-off events. [2024-06-27 19:18:53,266 INFO L125 PetriNetUnfolderBase]: For 63974/63986 co-relation queries the response was YES. [2024-06-27 19:18:53,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12630 conditions, 2180 events. 1287/2180 cut-off events. For 63974/63986 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 12199 event pairs, 322 based on Foata normal form. 13/2192 useless extension candidates. Maximal degree in co-relation 12550. Up to 1891 conditions per place. [2024-06-27 19:18:53,279 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 165 selfloop transitions, 38 changer transitions 0/210 dead transitions. [2024-06-27 19:18:53,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 210 transitions, 2403 flow [2024-06-27 19:18:53,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:53,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:53,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-27 19:18:53,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-27 19:18:53,281 INFO L175 Difference]: Start difference. First operand has 166 places, 187 transitions, 1919 flow. Second operand 7 states and 162 transitions. [2024-06-27 19:18:53,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 210 transitions, 2403 flow [2024-06-27 19:18:53,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 210 transitions, 2276 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:53,385 INFO L231 Difference]: Finished difference. Result has 169 places, 190 transitions, 1908 flow [2024-06-27 19:18:53,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1792, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1908, PETRI_PLACES=169, PETRI_TRANSITIONS=190} [2024-06-27 19:18:53,386 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2024-06-27 19:18:53,386 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 190 transitions, 1908 flow [2024-06-27 19:18:53,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:53,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:53,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:53,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 19:18:53,388 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:53,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:53,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1210816811, now seen corresponding path program 2 times [2024-06-27 19:18:53,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:53,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366069255] [2024-06-27 19:18:53,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:53,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:53,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:53,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:53,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:53,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366069255] [2024-06-27 19:18:53,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366069255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:53,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:53,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:53,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241667898] [2024-06-27 19:18:53,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:53,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:53,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:53,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:53,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:53,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:53,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 190 transitions, 1908 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:53,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:53,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:53,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:53,859 INFO L124 PetriNetUnfolderBase]: 1318/2229 cut-off events. [2024-06-27 19:18:53,859 INFO L125 PetriNetUnfolderBase]: For 68552/68564 co-relation queries the response was YES. [2024-06-27 19:18:53,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13090 conditions, 2229 events. 1318/2229 cut-off events. For 68552/68564 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 12539 event pairs, 322 based on Foata normal form. 13/2241 useless extension candidates. Maximal degree in co-relation 13008. Up to 1882 conditions per place. [2024-06-27 19:18:53,876 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 144 selfloop transitions, 75 changer transitions 0/226 dead transitions. [2024-06-27 19:18:53,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 226 transitions, 2743 flow [2024-06-27 19:18:53,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:18:53,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:18:53,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-27 19:18:53,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-27 19:18:53,878 INFO L175 Difference]: Start difference. First operand has 169 places, 190 transitions, 1908 flow. Second operand 9 states and 201 transitions. [2024-06-27 19:18:53,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 226 transitions, 2743 flow [2024-06-27 19:18:54,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 226 transitions, 2643 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 19:18:54,012 INFO L231 Difference]: Finished difference. Result has 173 places, 205 transitions, 2151 flow [2024-06-27 19:18:54,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1820, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2151, PETRI_PLACES=173, PETRI_TRANSITIONS=205} [2024-06-27 19:18:54,013 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 132 predicate places. [2024-06-27 19:18:54,013 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 205 transitions, 2151 flow [2024-06-27 19:18:54,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:54,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:54,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:54,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 19:18:54,013 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:54,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:54,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1210579475, now seen corresponding path program 3 times [2024-06-27 19:18:54,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:54,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082595218] [2024-06-27 19:18:54,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:54,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:54,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:54,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:54,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:54,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082595218] [2024-06-27 19:18:54,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082595218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:54,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:54,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:54,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907531135] [2024-06-27 19:18:54,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:54,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:54,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:54,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:54,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:54,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:54,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 205 transitions, 2151 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:54,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:54,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:54,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:54,477 INFO L124 PetriNetUnfolderBase]: 1331/2251 cut-off events. [2024-06-27 19:18:54,478 INFO L125 PetriNetUnfolderBase]: For 72643/72655 co-relation queries the response was YES. [2024-06-27 19:18:54,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13383 conditions, 2251 events. 1331/2251 cut-off events. For 72643/72655 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 12663 event pairs, 322 based on Foata normal form. 13/2263 useless extension candidates. Maximal degree in co-relation 13300. Up to 1943 conditions per place. [2024-06-27 19:18:54,496 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 173 selfloop transitions, 50 changer transitions 0/230 dead transitions. [2024-06-27 19:18:54,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 230 transitions, 2795 flow [2024-06-27 19:18:54,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:18:54,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:18:54,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-27 19:18:54,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55625 [2024-06-27 19:18:54,497 INFO L175 Difference]: Start difference. First operand has 173 places, 205 transitions, 2151 flow. Second operand 8 states and 178 transitions. [2024-06-27 19:18:54,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 230 transitions, 2795 flow [2024-06-27 19:18:54,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 230 transitions, 2682 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:54,650 INFO L231 Difference]: Finished difference. Result has 179 places, 211 transitions, 2234 flow [2024-06-27 19:18:54,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2038, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2234, PETRI_PLACES=179, PETRI_TRANSITIONS=211} [2024-06-27 19:18:54,651 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 138 predicate places. [2024-06-27 19:18:54,651 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 211 transitions, 2234 flow [2024-06-27 19:18:54,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:54,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:54,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:54,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 19:18:54,651 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:54,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:54,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1126390637, now seen corresponding path program 3 times [2024-06-27 19:18:54,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:54,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24116741] [2024-06-27 19:18:54,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:54,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:54,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:54,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:54,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:54,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24116741] [2024-06-27 19:18:54,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24116741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:54,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:54,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:54,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958736824] [2024-06-27 19:18:54,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:54,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:54,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:54,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:54,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:54,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:54,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 211 transitions, 2234 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:54,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:54,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:54,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:55,098 INFO L124 PetriNetUnfolderBase]: 1328/2247 cut-off events. [2024-06-27 19:18:55,098 INFO L125 PetriNetUnfolderBase]: For 75138/75150 co-relation queries the response was YES. [2024-06-27 19:18:55,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13387 conditions, 2247 events. 1328/2247 cut-off events. For 75138/75150 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 12679 event pairs, 322 based on Foata normal form. 13/2259 useless extension candidates. Maximal degree in co-relation 13302. Up to 1897 conditions per place. [2024-06-27 19:18:55,116 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 151 selfloop transitions, 76 changer transitions 0/234 dead transitions. [2024-06-27 19:18:55,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 234 transitions, 2910 flow [2024-06-27 19:18:55,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:18:55,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:18:55,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2024-06-27 19:18:55,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386363636363637 [2024-06-27 19:18:55,121 INFO L175 Difference]: Start difference. First operand has 179 places, 211 transitions, 2234 flow. Second operand 11 states and 237 transitions. [2024-06-27 19:18:55,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 234 transitions, 2910 flow [2024-06-27 19:18:55,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 234 transitions, 2790 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:55,276 INFO L231 Difference]: Finished difference. Result has 186 places, 211 transitions, 2272 flow [2024-06-27 19:18:55,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2114, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2272, PETRI_PLACES=186, PETRI_TRANSITIONS=211} [2024-06-27 19:18:55,276 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 145 predicate places. [2024-06-27 19:18:55,277 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 211 transitions, 2272 flow [2024-06-27 19:18:55,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:55,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:55,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:55,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 19:18:55,277 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:55,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:55,277 INFO L85 PathProgramCache]: Analyzing trace with hash 944790125, now seen corresponding path program 1 times [2024-06-27 19:18:55,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:55,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450758471] [2024-06-27 19:18:55,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:55,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:55,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:55,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:55,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:55,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450758471] [2024-06-27 19:18:55,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450758471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:55,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:55,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:55,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411727343] [2024-06-27 19:18:55,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:55,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:55,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:55,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:55,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:55,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:55,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 211 transitions, 2272 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:55,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:55,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:55,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:55,770 INFO L124 PetriNetUnfolderBase]: 1402/2363 cut-off events. [2024-06-27 19:18:55,770 INFO L125 PetriNetUnfolderBase]: For 90450/90458 co-relation queries the response was YES. [2024-06-27 19:18:55,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14307 conditions, 2363 events. 1402/2363 cut-off events. For 90450/90458 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 13421 event pairs, 244 based on Foata normal form. 14/2376 useless extension candidates. Maximal degree in co-relation 14221. Up to 1984 conditions per place. [2024-06-27 19:18:55,787 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 207 selfloop transitions, 35 changer transitions 0/249 dead transitions. [2024-06-27 19:18:55,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 249 transitions, 3006 flow [2024-06-27 19:18:55,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:18:55,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:18:55,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-27 19:18:55,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5611111111111111 [2024-06-27 19:18:55,789 INFO L175 Difference]: Start difference. First operand has 186 places, 211 transitions, 2272 flow. Second operand 9 states and 202 transitions. [2024-06-27 19:18:55,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 249 transitions, 3006 flow [2024-06-27 19:18:55,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 249 transitions, 2830 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-27 19:18:55,992 INFO L231 Difference]: Finished difference. Result has 188 places, 216 transitions, 2236 flow [2024-06-27 19:18:55,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2096, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2236, PETRI_PLACES=188, PETRI_TRANSITIONS=216} [2024-06-27 19:18:55,993 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 147 predicate places. [2024-06-27 19:18:55,993 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 216 transitions, 2236 flow [2024-06-27 19:18:55,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:55,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:55,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:55,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 19:18:55,993 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:55,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:55,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1210813835, now seen corresponding path program 2 times [2024-06-27 19:18:55,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:55,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019871850] [2024-06-27 19:18:55,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:55,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:56,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:56,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:56,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019871850] [2024-06-27 19:18:56,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019871850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:56,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:56,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:56,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151987870] [2024-06-27 19:18:56,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:56,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:56,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:56,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:56,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:56,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:56,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 216 transitions, 2236 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:56,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:56,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:56,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:56,510 INFO L124 PetriNetUnfolderBase]: 1430/2411 cut-off events. [2024-06-27 19:18:56,511 INFO L125 PetriNetUnfolderBase]: For 96531/96539 co-relation queries the response was YES. [2024-06-27 19:18:56,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14656 conditions, 2411 events. 1430/2411 cut-off events. For 96531/96539 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 13757 event pairs, 325 based on Foata normal form. 16/2426 useless extension candidates. Maximal degree in co-relation 14567. Up to 2128 conditions per place. [2024-06-27 19:18:56,529 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 205 selfloop transitions, 30 changer transitions 0/242 dead transitions. [2024-06-27 19:18:56,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 242 transitions, 2807 flow [2024-06-27 19:18:56,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:18:56,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:18:56,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-27 19:18:56,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-27 19:18:56,531 INFO L175 Difference]: Start difference. First operand has 188 places, 216 transitions, 2236 flow. Second operand 9 states and 195 transitions. [2024-06-27 19:18:56,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 242 transitions, 2807 flow [2024-06-27 19:18:56,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 242 transitions, 2762 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:56,795 INFO L231 Difference]: Finished difference. Result has 193 places, 217 transitions, 2269 flow [2024-06-27 19:18:56,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2193, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2269, PETRI_PLACES=193, PETRI_TRANSITIONS=217} [2024-06-27 19:18:56,795 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 152 predicate places. [2024-06-27 19:18:56,795 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 217 transitions, 2269 flow [2024-06-27 19:18:56,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:56,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:56,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:56,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 19:18:56,796 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:56,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:56,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1210487405, now seen corresponding path program 3 times [2024-06-27 19:18:56,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:56,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279582306] [2024-06-27 19:18:56,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:56,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:56,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:56,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:56,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279582306] [2024-06-27 19:18:56,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279582306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:56,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:56,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:56,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369211933] [2024-06-27 19:18:56,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:56,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:56,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:56,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:56,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:56,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:56,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 217 transitions, 2269 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:56,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:56,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:56,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:57,298 INFO L124 PetriNetUnfolderBase]: 1458/2455 cut-off events. [2024-06-27 19:18:57,298 INFO L125 PetriNetUnfolderBase]: For 98782/98790 co-relation queries the response was YES. [2024-06-27 19:18:57,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15006 conditions, 2455 events. 1458/2455 cut-off events. For 98782/98790 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 14047 event pairs, 323 based on Foata normal form. 14/2468 useless extension candidates. Maximal degree in co-relation 14915. Up to 2142 conditions per place. [2024-06-27 19:18:57,317 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 209 selfloop transitions, 33 changer transitions 0/249 dead transitions. [2024-06-27 19:18:57,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 249 transitions, 2896 flow [2024-06-27 19:18:57,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:18:57,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:18:57,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-27 19:18:57,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-27 19:18:57,318 INFO L175 Difference]: Start difference. First operand has 193 places, 217 transitions, 2269 flow. Second operand 10 states and 215 transitions. [2024-06-27 19:18:57,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 249 transitions, 2896 flow [2024-06-27 19:18:57,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 249 transitions, 2837 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 19:18:57,501 INFO L231 Difference]: Finished difference. Result has 197 places, 220 transitions, 2325 flow [2024-06-27 19:18:57,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2210, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2325, PETRI_PLACES=197, PETRI_TRANSITIONS=220} [2024-06-27 19:18:57,502 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 156 predicate places. [2024-06-27 19:18:57,502 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 220 transitions, 2325 flow [2024-06-27 19:18:57,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:57,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:57,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:57,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 19:18:57,502 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:57,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:57,503 INFO L85 PathProgramCache]: Analyzing trace with hash 318037639, now seen corresponding path program 4 times [2024-06-27 19:18:57,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:57,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409554289] [2024-06-27 19:18:57,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:57,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:57,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:57,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:57,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409554289] [2024-06-27 19:18:57,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409554289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:57,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:57,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:57,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102625079] [2024-06-27 19:18:57,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:57,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:57,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:57,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:57,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:57,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:57,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 220 transitions, 2325 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:57,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:57,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:57,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:57,982 INFO L124 PetriNetUnfolderBase]: 1471/2479 cut-off events. [2024-06-27 19:18:57,982 INFO L125 PetriNetUnfolderBase]: For 99355/99367 co-relation queries the response was YES. [2024-06-27 19:18:57,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15345 conditions, 2479 events. 1471/2479 cut-off events. For 99355/99367 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 14249 event pairs, 350 based on Foata normal form. 13/2491 useless extension candidates. Maximal degree in co-relation 15252. Up to 2111 conditions per place. [2024-06-27 19:18:58,001 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 189 selfloop transitions, 59 changer transitions 0/255 dead transitions. [2024-06-27 19:18:58,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 255 transitions, 3161 flow [2024-06-27 19:18:58,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:18:58,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:18:58,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:18:58,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-27 19:18:58,002 INFO L175 Difference]: Start difference. First operand has 197 places, 220 transitions, 2325 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:18:58,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 255 transitions, 3161 flow [2024-06-27 19:18:58,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 255 transitions, 3095 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 19:18:58,235 INFO L231 Difference]: Finished difference. Result has 198 places, 226 transitions, 2467 flow [2024-06-27 19:18:58,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2259, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2467, PETRI_PLACES=198, PETRI_TRANSITIONS=226} [2024-06-27 19:18:58,236 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 157 predicate places. [2024-06-27 19:18:58,236 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 226 transitions, 2467 flow [2024-06-27 19:18:58,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:58,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:58,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:58,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 19:18:58,236 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:58,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:58,237 INFO L85 PathProgramCache]: Analyzing trace with hash -700013827, now seen corresponding path program 5 times [2024-06-27 19:18:58,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:58,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632393520] [2024-06-27 19:18:58,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:58,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:58,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:58,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:58,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:58,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632393520] [2024-06-27 19:18:58,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632393520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:58,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:58,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:58,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746384904] [2024-06-27 19:18:58,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:58,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:58,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:58,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:58,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:58,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:58,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 226 transitions, 2467 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:58,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:58,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:58,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:58,710 INFO L124 PetriNetUnfolderBase]: 1484/2499 cut-off events. [2024-06-27 19:18:58,710 INFO L125 PetriNetUnfolderBase]: For 104835/104847 co-relation queries the response was YES. [2024-06-27 19:18:58,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15659 conditions, 2499 events. 1484/2499 cut-off events. For 104835/104847 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 14396 event pairs, 350 based on Foata normal form. 13/2511 useless extension candidates. Maximal degree in co-relation 15565. Up to 2126 conditions per place. [2024-06-27 19:18:58,730 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 184 selfloop transitions, 68 changer transitions 0/259 dead transitions. [2024-06-27 19:18:58,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 259 transitions, 3321 flow [2024-06-27 19:18:58,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:18:58,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:18:58,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-27 19:18:58,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5722222222222222 [2024-06-27 19:18:58,731 INFO L175 Difference]: Start difference. First operand has 198 places, 226 transitions, 2467 flow. Second operand 9 states and 206 transitions. [2024-06-27 19:18:58,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 259 transitions, 3321 flow [2024-06-27 19:18:58,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 259 transitions, 3105 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-27 19:18:58,972 INFO L231 Difference]: Finished difference. Result has 202 places, 232 transitions, 2489 flow [2024-06-27 19:18:58,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2285, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2489, PETRI_PLACES=202, PETRI_TRANSITIONS=232} [2024-06-27 19:18:58,972 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 161 predicate places. [2024-06-27 19:18:58,972 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 232 transitions, 2489 flow [2024-06-27 19:18:58,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:58,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:58,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:58,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:18:58,973 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:58,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:58,973 INFO L85 PathProgramCache]: Analyzing trace with hash -700013455, now seen corresponding path program 1 times [2024-06-27 19:18:58,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:58,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349198653] [2024-06-27 19:18:58,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:58,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:59,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:59,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:59,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349198653] [2024-06-27 19:18:59,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349198653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:59,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:59,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:59,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403481203] [2024-06-27 19:18:59,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:59,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:59,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:59,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:59,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:59,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:59,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 232 transitions, 2489 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:59,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:59,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:59,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:59,454 INFO L124 PetriNetUnfolderBase]: 1497/2519 cut-off events. [2024-06-27 19:18:59,454 INFO L125 PetriNetUnfolderBase]: For 109585/109597 co-relation queries the response was YES. [2024-06-27 19:18:59,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15853 conditions, 2519 events. 1497/2519 cut-off events. For 109585/109597 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 14495 event pairs, 349 based on Foata normal form. 13/2531 useless extension candidates. Maximal degree in co-relation 15758. Up to 2186 conditions per place. [2024-06-27 19:18:59,477 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 194 selfloop transitions, 53 changer transitions 0/254 dead transitions. [2024-06-27 19:18:59,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 254 transitions, 3213 flow [2024-06-27 19:18:59,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:18:59,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:18:59,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-27 19:18:59,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.559375 [2024-06-27 19:18:59,478 INFO L175 Difference]: Start difference. First operand has 202 places, 232 transitions, 2489 flow. Second operand 8 states and 179 transitions. [2024-06-27 19:18:59,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 254 transitions, 3213 flow [2024-06-27 19:18:59,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 254 transitions, 3083 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 19:18:59,674 INFO L231 Difference]: Finished difference. Result has 205 places, 238 transitions, 2577 flow [2024-06-27 19:18:59,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2359, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2577, PETRI_PLACES=205, PETRI_TRANSITIONS=238} [2024-06-27 19:18:59,675 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-27 19:18:59,675 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 238 transitions, 2577 flow [2024-06-27 19:18:59,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:59,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:59,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:59,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:18:59,675 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:59,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:59,675 INFO L85 PathProgramCache]: Analyzing trace with hash -705674737, now seen corresponding path program 6 times [2024-06-27 19:18:59,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:59,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316800378] [2024-06-27 19:18:59,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:59,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:59,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:59,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:59,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:59,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316800378] [2024-06-27 19:18:59,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316800378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:59,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:59,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:59,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954698069] [2024-06-27 19:18:59,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:59,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:59,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:59,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:59,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:59,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:59,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 238 transitions, 2577 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:59,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:59,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:59,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:00,163 INFO L124 PetriNetUnfolderBase]: 1494/2514 cut-off events. [2024-06-27 19:19:00,163 INFO L125 PetriNetUnfolderBase]: For 113382/113390 co-relation queries the response was YES. [2024-06-27 19:19:00,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16020 conditions, 2514 events. 1494/2514 cut-off events. For 113382/113390 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 14452 event pairs, 361 based on Foata normal form. 9/2521 useless extension candidates. Maximal degree in co-relation 15924. Up to 2141 conditions per place. [2024-06-27 19:19:00,179 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 191 selfloop transitions, 61 changer transitions 0/259 dead transitions. [2024-06-27 19:19:00,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 259 transitions, 3329 flow [2024-06-27 19:19:00,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:19:00,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:19:00,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 19:19:00,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-27 19:19:00,180 INFO L175 Difference]: Start difference. First operand has 205 places, 238 transitions, 2577 flow. Second operand 6 states and 148 transitions. [2024-06-27 19:19:00,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 259 transitions, 3329 flow [2024-06-27 19:19:00,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 259 transitions, 3207 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 19:19:00,429 INFO L231 Difference]: Finished difference. Result has 206 places, 238 transitions, 2587 flow [2024-06-27 19:19:00,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2459, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2587, PETRI_PLACES=206, PETRI_TRANSITIONS=238} [2024-06-27 19:19:00,429 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-06-27 19:19:00,429 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 238 transitions, 2587 flow [2024-06-27 19:19:00,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:00,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:00,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:00,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 19:19:00,430 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:00,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:00,430 INFO L85 PathProgramCache]: Analyzing trace with hash -705554581, now seen corresponding path program 4 times [2024-06-27 19:19:00,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:00,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681491316] [2024-06-27 19:19:00,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:00,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:00,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:00,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:00,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:00,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681491316] [2024-06-27 19:19:00,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681491316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:00,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:00,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:00,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231288481] [2024-06-27 19:19:00,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:00,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:00,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:00,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:00,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:00,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:00,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 238 transitions, 2587 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:00,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:00,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:00,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:00,910 INFO L124 PetriNetUnfolderBase]: 1491/2511 cut-off events. [2024-06-27 19:19:00,910 INFO L125 PetriNetUnfolderBase]: For 112438/112450 co-relation queries the response was YES. [2024-06-27 19:19:00,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16025 conditions, 2511 events. 1491/2511 cut-off events. For 112438/112450 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 14454 event pairs, 349 based on Foata normal form. 13/2523 useless extension candidates. Maximal degree in co-relation 15928. Up to 2181 conditions per place. [2024-06-27 19:19:00,931 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 195 selfloop transitions, 54 changer transitions 0/256 dead transitions. [2024-06-27 19:19:00,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 256 transitions, 3227 flow [2024-06-27 19:19:00,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:19:00,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:19:00,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-27 19:19:00,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-27 19:19:00,932 INFO L175 Difference]: Start difference. First operand has 206 places, 238 transitions, 2587 flow. Second operand 7 states and 164 transitions. [2024-06-27 19:19:00,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 256 transitions, 3227 flow [2024-06-27 19:19:01,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 256 transitions, 3075 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 19:19:01,259 INFO L231 Difference]: Finished difference. Result has 208 places, 238 transitions, 2553 flow [2024-06-27 19:19:01,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2435, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2553, PETRI_PLACES=208, PETRI_TRANSITIONS=238} [2024-06-27 19:19:01,259 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 167 predicate places. [2024-06-27 19:19:01,259 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 238 transitions, 2553 flow [2024-06-27 19:19:01,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:01,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:01,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:01,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 19:19:01,260 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:01,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:01,260 INFO L85 PathProgramCache]: Analyzing trace with hash -705554767, now seen corresponding path program 7 times [2024-06-27 19:19:01,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:01,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050096293] [2024-06-27 19:19:01,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:01,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:01,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:01,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:01,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050096293] [2024-06-27 19:19:01,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050096293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:01,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:01,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:01,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438174368] [2024-06-27 19:19:01,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:01,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:01,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:01,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:01,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:01,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:01,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 238 transitions, 2553 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:01,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:01,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:01,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:01,778 INFO L124 PetriNetUnfolderBase]: 1488/2507 cut-off events. [2024-06-27 19:19:01,779 INFO L125 PetriNetUnfolderBase]: For 115189/115201 co-relation queries the response was YES. [2024-06-27 19:19:01,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15991 conditions, 2507 events. 1488/2507 cut-off events. For 115189/115201 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 14428 event pairs, 349 based on Foata normal form. 13/2519 useless extension candidates. Maximal degree in co-relation 15893. Up to 2208 conditions per place. [2024-06-27 19:19:01,800 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 213 selfloop transitions, 34 changer transitions 0/254 dead transitions. [2024-06-27 19:19:01,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 254 transitions, 3087 flow [2024-06-27 19:19:01,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:19:01,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:19:01,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-27 19:19:01,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-27 19:19:01,801 INFO L175 Difference]: Start difference. First operand has 208 places, 238 transitions, 2553 flow. Second operand 6 states and 141 transitions. [2024-06-27 19:19:01,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 254 transitions, 3087 flow [2024-06-27 19:19:02,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 254 transitions, 2984 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 19:19:02,069 INFO L231 Difference]: Finished difference. Result has 209 places, 238 transitions, 2524 flow [2024-06-27 19:19:02,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2450, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2524, PETRI_PLACES=209, PETRI_TRANSITIONS=238} [2024-06-27 19:19:02,069 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 168 predicate places. [2024-06-27 19:19:02,069 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 238 transitions, 2524 flow [2024-06-27 19:19:02,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:02,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:02,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:02,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 19:19:02,070 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)] === [2024-06-27 19:19:02,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:02,070 INFO L85 PathProgramCache]: Analyzing trace with hash 620163953, now seen corresponding path program 8 times [2024-06-27 19:19:02,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:02,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902686415] [2024-06-27 19:19:02,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:02,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:02,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:02,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:02,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:02,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902686415] [2024-06-27 19:19:02,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902686415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:02,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:02,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:02,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64076069] [2024-06-27 19:19:02,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:02,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:02,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:02,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:02,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:02,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:02,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 238 transitions, 2524 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:02,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:02,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:02,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:02,571 INFO L124 PetriNetUnfolderBase]: 1485/2505 cut-off events. [2024-06-27 19:19:02,571 INFO L125 PetriNetUnfolderBase]: For 118170/118182 co-relation queries the response was YES. [2024-06-27 19:19:02,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15972 conditions, 2505 events. 1485/2505 cut-off events. For 118170/118182 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 14449 event pairs, 349 based on Foata normal form. 13/2517 useless extension candidates. Maximal degree in co-relation 15873. Up to 2148 conditions per place. [2024-06-27 19:19:02,630 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 204 selfloop transitions, 54 changer transitions 0/265 dead transitions. [2024-06-27 19:19:02,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 265 transitions, 3210 flow [2024-06-27 19:19:02,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:19:02,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:19:02,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:19:02,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-27 19:19:02,631 INFO L175 Difference]: Start difference. First operand has 209 places, 238 transitions, 2524 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:19:02,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 265 transitions, 3210 flow [2024-06-27 19:19:02,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 265 transitions, 3122 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 19:19:02,911 INFO L231 Difference]: Finished difference. Result has 211 places, 238 transitions, 2558 flow [2024-06-27 19:19:02,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2436, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2558, PETRI_PLACES=211, PETRI_TRANSITIONS=238} [2024-06-27 19:19:02,912 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 170 predicate places. [2024-06-27 19:19:02,912 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 238 transitions, 2558 flow [2024-06-27 19:19:02,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:02,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:02,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:02,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 19:19:02,912 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)] === [2024-06-27 19:19:02,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:02,913 INFO L85 PathProgramCache]: Analyzing trace with hash 620175485, now seen corresponding path program 2 times [2024-06-27 19:19:02,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:02,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238687723] [2024-06-27 19:19:02,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:02,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:03,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:03,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238687723] [2024-06-27 19:19:03,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238687723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:03,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:03,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:03,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61761742] [2024-06-27 19:19:03,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:03,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:03,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:03,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:03,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:03,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:03,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 238 transitions, 2558 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:03,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:03,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:03,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:03,415 INFO L124 PetriNetUnfolderBase]: 1514/2548 cut-off events. [2024-06-27 19:19:03,416 INFO L125 PetriNetUnfolderBase]: For 124275/124287 co-relation queries the response was YES. [2024-06-27 19:19:03,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16507 conditions, 2548 events. 1514/2548 cut-off events. For 124275/124287 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 14668 event pairs, 349 based on Foata normal form. 13/2560 useless extension candidates. Maximal degree in co-relation 16407. Up to 2231 conditions per place. [2024-06-27 19:19:03,436 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 212 selfloop transitions, 46 changer transitions 0/265 dead transitions. [2024-06-27 19:19:03,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 265 transitions, 3383 flow [2024-06-27 19:19:03,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:19:03,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:19:03,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-27 19:19:03,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-27 19:19:03,437 INFO L175 Difference]: Start difference. First operand has 211 places, 238 transitions, 2558 flow. Second operand 7 states and 160 transitions. [2024-06-27 19:19:03,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 265 transitions, 3383 flow [2024-06-27 19:19:03,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 265 transitions, 3221 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 19:19:03,684 INFO L231 Difference]: Finished difference. Result has 210 places, 250 transitions, 2704 flow [2024-06-27 19:19:03,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2414, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2704, PETRI_PLACES=210, PETRI_TRANSITIONS=250} [2024-06-27 19:19:03,685 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 169 predicate places. [2024-06-27 19:19:03,685 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 250 transitions, 2704 flow [2024-06-27 19:19:03,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:03,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:03,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:03,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 19:19:03,686 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)] === [2024-06-27 19:19:03,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:03,686 INFO L85 PathProgramCache]: Analyzing trace with hash 620164139, now seen corresponding path program 5 times [2024-06-27 19:19:03,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:03,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052087521] [2024-06-27 19:19:03,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:03,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:03,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:03,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:03,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:03,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052087521] [2024-06-27 19:19:03,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052087521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:03,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:03,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:03,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758658182] [2024-06-27 19:19:03,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:03,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:03,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:03,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:03,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:03,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:03,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 250 transitions, 2704 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:03,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:03,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:03,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:04,202 INFO L124 PetriNetUnfolderBase]: 1519/2557 cut-off events. [2024-06-27 19:19:04,202 INFO L125 PetriNetUnfolderBase]: For 119855/119869 co-relation queries the response was YES. [2024-06-27 19:19:04,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16450 conditions, 2557 events. 1519/2557 cut-off events. For 119855/119869 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 14739 event pairs, 349 based on Foata normal form. 15/2571 useless extension candidates. Maximal degree in co-relation 16350. Up to 2220 conditions per place. [2024-06-27 19:19:04,225 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 206 selfloop transitions, 57 changer transitions 0/270 dead transitions. [2024-06-27 19:19:04,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 270 transitions, 3420 flow [2024-06-27 19:19:04,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:19:04,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:19:04,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 19:19:04,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-27 19:19:04,226 INFO L175 Difference]: Start difference. First operand has 210 places, 250 transitions, 2704 flow. Second operand 6 states and 145 transitions. [2024-06-27 19:19:04,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 270 transitions, 3420 flow [2024-06-27 19:19:04,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 270 transitions, 3359 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 19:19:04,493 INFO L231 Difference]: Finished difference. Result has 213 places, 253 transitions, 2823 flow [2024-06-27 19:19:04,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2645, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2823, PETRI_PLACES=213, PETRI_TRANSITIONS=253} [2024-06-27 19:19:04,494 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-27 19:19:04,494 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 253 transitions, 2823 flow [2024-06-27 19:19:04,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:04,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:04,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:04,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 19:19:04,494 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)] === [2024-06-27 19:19:04,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:04,495 INFO L85 PathProgramCache]: Analyzing trace with hash 620169905, now seen corresponding path program 3 times [2024-06-27 19:19:04,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:04,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012842335] [2024-06-27 19:19:04,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:04,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:04,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:04,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:04,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:04,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012842335] [2024-06-27 19:19:04,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012842335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:04,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:04,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:04,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9508562] [2024-06-27 19:19:04,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:04,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:04,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:04,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:04,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:04,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:04,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 253 transitions, 2823 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:04,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:04,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:04,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:05,049 INFO L124 PetriNetUnfolderBase]: 1516/2553 cut-off events. [2024-06-27 19:19:05,049 INFO L125 PetriNetUnfolderBase]: For 118707/118721 co-relation queries the response was YES. [2024-06-27 19:19:05,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16501 conditions, 2553 events. 1516/2553 cut-off events. For 118707/118721 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 14724 event pairs, 349 based on Foata normal form. 15/2567 useless extension candidates. Maximal degree in co-relation 16400. Up to 2235 conditions per place. [2024-06-27 19:19:05,071 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 213 selfloop transitions, 46 changer transitions 0/266 dead transitions. [2024-06-27 19:19:05,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 266 transitions, 3373 flow [2024-06-27 19:19:05,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:19:05,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:19:05,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-27 19:19:05,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-27 19:19:05,073 INFO L175 Difference]: Start difference. First operand has 213 places, 253 transitions, 2823 flow. Second operand 6 states and 141 transitions. [2024-06-27 19:19:05,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 266 transitions, 3373 flow [2024-06-27 19:19:05,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 266 transitions, 3235 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 19:19:05,355 INFO L231 Difference]: Finished difference. Result has 214 places, 253 transitions, 2787 flow [2024-06-27 19:19:05,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2685, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2787, PETRI_PLACES=214, PETRI_TRANSITIONS=253} [2024-06-27 19:19:05,356 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 173 predicate places. [2024-06-27 19:19:05,356 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 253 transitions, 2787 flow [2024-06-27 19:19:05,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:05,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:05,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:05,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 19:19:05,356 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)] === [2024-06-27 19:19:05,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:05,356 INFO L85 PathProgramCache]: Analyzing trace with hash 620175299, now seen corresponding path program 6 times [2024-06-27 19:19:05,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:05,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695401344] [2024-06-27 19:19:05,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:05,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:05,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:05,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:05,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:05,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695401344] [2024-06-27 19:19:05,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695401344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:05,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:05,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:05,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165666543] [2024-06-27 19:19:05,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:05,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:05,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:05,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:05,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:05,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:05,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 253 transitions, 2787 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:05,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:05,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:05,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:05,859 INFO L124 PetriNetUnfolderBase]: 1513/2549 cut-off events. [2024-06-27 19:19:05,859 INFO L125 PetriNetUnfolderBase]: For 113372/113386 co-relation queries the response was YES. [2024-06-27 19:19:05,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16286 conditions, 2549 events. 1513/2549 cut-off events. For 113372/113386 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 14719 event pairs, 349 based on Foata normal form. 15/2563 useless extension candidates. Maximal degree in co-relation 16186. Up to 2213 conditions per place. [2024-06-27 19:19:05,879 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 206 selfloop transitions, 57 changer transitions 0/270 dead transitions. [2024-06-27 19:19:05,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 270 transitions, 3355 flow [2024-06-27 19:19:05,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:19:05,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:19:05,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-27 19:19:05,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-27 19:19:05,880 INFO L175 Difference]: Start difference. First operand has 214 places, 253 transitions, 2787 flow. Second operand 7 states and 162 transitions. [2024-06-27 19:19:05,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 270 transitions, 3355 flow [2024-06-27 19:19:06,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 270 transitions, 3233 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 19:19:06,166 INFO L231 Difference]: Finished difference. Result has 215 places, 253 transitions, 2789 flow [2024-06-27 19:19:06,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2665, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2789, PETRI_PLACES=215, PETRI_TRANSITIONS=253} [2024-06-27 19:19:06,167 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 174 predicate places. [2024-06-27 19:19:06,167 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 253 transitions, 2789 flow [2024-06-27 19:19:06,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:06,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:06,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:06,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 19:19:06,167 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)] === [2024-06-27 19:19:06,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:06,167 INFO L85 PathProgramCache]: Analyzing trace with hash 620169533, now seen corresponding path program 9 times [2024-06-27 19:19:06,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:06,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822839689] [2024-06-27 19:19:06,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:06,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:06,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:06,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:06,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:06,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822839689] [2024-06-27 19:19:06,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822839689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:06,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:06,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:06,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594738945] [2024-06-27 19:19:06,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:06,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:06,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:06,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:06,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:06,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:06,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 253 transitions, 2789 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:06,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:06,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:06,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:06,670 INFO L124 PetriNetUnfolderBase]: 1510/2545 cut-off events. [2024-06-27 19:19:06,670 INFO L125 PetriNetUnfolderBase]: For 112095/112109 co-relation queries the response was YES. [2024-06-27 19:19:06,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16222 conditions, 2545 events. 1510/2545 cut-off events. For 112095/112109 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 14686 event pairs, 349 based on Foata normal form. 15/2559 useless extension candidates. Maximal degree in co-relation 16122. Up to 2173 conditions per place. [2024-06-27 19:19:06,690 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 208 selfloop transitions, 60 changer transitions 0/275 dead transitions. [2024-06-27 19:19:06,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 275 transitions, 3381 flow [2024-06-27 19:19:06,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:19:06,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:19:06,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 19:19:06,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 19:19:06,691 INFO L175 Difference]: Start difference. First operand has 215 places, 253 transitions, 2789 flow. Second operand 6 states and 150 transitions. [2024-06-27 19:19:06,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 275 transitions, 3381 flow [2024-06-27 19:19:06,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 275 transitions, 3205 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 19:19:06,959 INFO L231 Difference]: Finished difference. Result has 213 places, 253 transitions, 2745 flow [2024-06-27 19:19:06,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2613, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2745, PETRI_PLACES=213, PETRI_TRANSITIONS=253} [2024-06-27 19:19:06,959 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-27 19:19:06,959 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 253 transitions, 2745 flow [2024-06-27 19:19:06,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:06,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:06,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:06,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 19:19:06,960 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)] === [2024-06-27 19:19:06,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:06,960 INFO L85 PathProgramCache]: Analyzing trace with hash -368055421, now seen corresponding path program 7 times [2024-06-27 19:19:06,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:06,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056922446] [2024-06-27 19:19:06,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:06,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:06,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:07,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:07,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056922446] [2024-06-27 19:19:07,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056922446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:07,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:07,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:07,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084204878] [2024-06-27 19:19:07,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:07,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:07,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:07,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:07,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:07,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:07,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 253 transitions, 2745 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:07,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:07,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:07,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:07,430 INFO L124 PetriNetUnfolderBase]: 1515/2551 cut-off events. [2024-06-27 19:19:07,430 INFO L125 PetriNetUnfolderBase]: For 112391/112401 co-relation queries the response was YES. [2024-06-27 19:19:07,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16269 conditions, 2551 events. 1515/2551 cut-off events. For 112391/112401 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 14715 event pairs, 371 based on Foata normal form. 8/2557 useless extension candidates. Maximal degree in co-relation 16169. Up to 2180 conditions per place. [2024-06-27 19:19:07,450 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 186 selfloop transitions, 74 changer transitions 0/267 dead transitions. [2024-06-27 19:19:07,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 267 transitions, 3430 flow [2024-06-27 19:19:07,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:19:07,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:19:07,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-27 19:19:07,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 19:19:07,451 INFO L175 Difference]: Start difference. First operand has 213 places, 253 transitions, 2745 flow. Second operand 6 states and 138 transitions. [2024-06-27 19:19:07,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 267 transitions, 3430 flow [2024-06-27 19:19:07,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 267 transitions, 3301 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 19:19:07,717 INFO L231 Difference]: Finished difference. Result has 213 places, 256 transitions, 2811 flow [2024-06-27 19:19:07,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2618, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2811, PETRI_PLACES=213, PETRI_TRANSITIONS=256} [2024-06-27 19:19:07,717 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-27 19:19:07,718 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 256 transitions, 2811 flow [2024-06-27 19:19:07,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:07,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:07,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:07,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 19:19:07,718 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)] === [2024-06-27 19:19:07,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:07,718 INFO L85 PathProgramCache]: Analyzing trace with hash -379017517, now seen corresponding path program 10 times [2024-06-27 19:19:07,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:07,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539469803] [2024-06-27 19:19:07,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:07,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:07,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:07,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:07,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:07,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539469803] [2024-06-27 19:19:07,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539469803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:07,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:07,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:07,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168360004] [2024-06-27 19:19:07,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:07,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:07,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:07,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:07,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:07,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:07,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 256 transitions, 2811 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:07,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:07,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:07,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:08,195 INFO L124 PetriNetUnfolderBase]: 1512/2548 cut-off events. [2024-06-27 19:19:08,195 INFO L125 PetriNetUnfolderBase]: For 110827/110841 co-relation queries the response was YES. [2024-06-27 19:19:08,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16187 conditions, 2548 events. 1512/2548 cut-off events. For 110827/110841 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 14707 event pairs, 349 based on Foata normal form. 15/2562 useless extension candidates. Maximal degree in co-relation 16087. Up to 2140 conditions per place. [2024-06-27 19:19:08,215 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 196 selfloop transitions, 83 changer transitions 0/286 dead transitions. [2024-06-27 19:19:08,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 286 transitions, 3445 flow [2024-06-27 19:19:08,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:19:08,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:19:08,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 19:19:08,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-27 19:19:08,216 INFO L175 Difference]: Start difference. First operand has 213 places, 256 transitions, 2811 flow. Second operand 8 states and 193 transitions. [2024-06-27 19:19:08,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 286 transitions, 3445 flow [2024-06-27 19:19:08,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 286 transitions, 3308 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 19:19:08,502 INFO L231 Difference]: Finished difference. Result has 218 places, 256 transitions, 2858 flow [2024-06-27 19:19:08,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2674, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2858, PETRI_PLACES=218, PETRI_TRANSITIONS=256} [2024-06-27 19:19:08,503 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 177 predicate places. [2024-06-27 19:19:08,503 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 256 transitions, 2858 flow [2024-06-27 19:19:08,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:08,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:08,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:08,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 19:19:08,503 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)] === [2024-06-27 19:19:08,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:08,504 INFO L85 PathProgramCache]: Analyzing trace with hash -378780181, now seen corresponding path program 8 times [2024-06-27 19:19:08,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:08,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642192463] [2024-06-27 19:19:08,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:08,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:08,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:08,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:08,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642192463] [2024-06-27 19:19:08,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642192463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:08,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:08,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:08,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34768843] [2024-06-27 19:19:08,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:08,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:08,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:08,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:08,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:08,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:08,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 256 transitions, 2858 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:08,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:08,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:08,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:08,970 INFO L124 PetriNetUnfolderBase]: 1517/2557 cut-off events. [2024-06-27 19:19:08,970 INFO L125 PetriNetUnfolderBase]: For 115138/115152 co-relation queries the response was YES. [2024-06-27 19:19:08,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16391 conditions, 2557 events. 1517/2557 cut-off events. For 115138/115152 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 14798 event pairs, 349 based on Foata normal form. 15/2571 useless extension candidates. Maximal degree in co-relation 16290. Up to 2182 conditions per place. [2024-06-27 19:19:08,989 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 189 selfloop transitions, 82 changer transitions 0/278 dead transitions. [2024-06-27 19:19:08,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 278 transitions, 3590 flow [2024-06-27 19:19:08,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:19:08,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:19:08,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-27 19:19:08,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2024-06-27 19:19:08,990 INFO L175 Difference]: Start difference. First operand has 218 places, 256 transitions, 2858 flow. Second operand 8 states and 181 transitions. [2024-06-27 19:19:08,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 278 transitions, 3590 flow [2024-06-27 19:19:09,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 278 transitions, 3408 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 19:19:09,226 INFO L231 Difference]: Finished difference. Result has 218 places, 259 transitions, 2898 flow [2024-06-27 19:19:09,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2682, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2898, PETRI_PLACES=218, PETRI_TRANSITIONS=259} [2024-06-27 19:19:09,226 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 177 predicate places. [2024-06-27 19:19:09,226 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 259 transitions, 2898 flow [2024-06-27 19:19:09,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:09,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:09,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:09,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 19:19:09,227 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)] === [2024-06-27 19:19:09,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:09,227 INFO L85 PathProgramCache]: Analyzing trace with hash -379017331, now seen corresponding path program 9 times [2024-06-27 19:19:09,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:09,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142511759] [2024-06-27 19:19:09,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:09,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:09,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:09,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:09,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142511759] [2024-06-27 19:19:09,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142511759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:09,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:09,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:09,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322604258] [2024-06-27 19:19:09,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:09,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:09,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:09,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:09,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:09,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:09,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 259 transitions, 2898 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:09,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:09,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:09,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:09,700 INFO L124 PetriNetUnfolderBase]: 1514/2553 cut-off events. [2024-06-27 19:19:09,700 INFO L125 PetriNetUnfolderBase]: For 105977/105991 co-relation queries the response was YES. [2024-06-27 19:19:09,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16123 conditions, 2553 events. 1514/2553 cut-off events. For 105977/105991 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 14767 event pairs, 349 based on Foata normal form. 15/2567 useless extension candidates. Maximal degree in co-relation 16022. Up to 2179 conditions per place. [2024-06-27 19:19:09,720 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 188 selfloop transitions, 86 changer transitions 0/281 dead transitions. [2024-06-27 19:19:09,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 281 transitions, 3500 flow [2024-06-27 19:19:09,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:19:09,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:19:09,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-27 19:19:09,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-27 19:19:09,722 INFO L175 Difference]: Start difference. First operand has 218 places, 259 transitions, 2898 flow. Second operand 9 states and 201 transitions. [2024-06-27 19:19:09,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 281 transitions, 3500 flow [2024-06-27 19:19:09,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 281 transitions, 3272 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-27 19:19:09,949 INFO L231 Difference]: Finished difference. Result has 220 places, 259 transitions, 2856 flow [2024-06-27 19:19:09,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2670, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2856, PETRI_PLACES=220, PETRI_TRANSITIONS=259} [2024-06-27 19:19:09,949 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 179 predicate places. [2024-06-27 19:19:09,950 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 259 transitions, 2856 flow [2024-06-27 19:19:09,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:09,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:09,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:09,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 19:19:09,950 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)] === [2024-06-27 19:19:09,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:09,951 INFO L85 PathProgramCache]: Analyzing trace with hash -368058397, now seen corresponding path program 4 times [2024-06-27 19:19:09,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:09,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76278776] [2024-06-27 19:19:09,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:09,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:09,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:10,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:10,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:10,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76278776] [2024-06-27 19:19:10,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76278776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:10,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:10,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:10,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859964950] [2024-06-27 19:19:10,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:10,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:10,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:10,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:10,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:10,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:10,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 259 transitions, 2856 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:10,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:10,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:10,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:10,480 INFO L124 PetriNetUnfolderBase]: 1542/2592 cut-off events. [2024-06-27 19:19:10,480 INFO L125 PetriNetUnfolderBase]: For 114272/114276 co-relation queries the response was YES. [2024-06-27 19:19:10,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16329 conditions, 2592 events. 1542/2592 cut-off events. For 114272/114276 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 14975 event pairs, 341 based on Foata normal form. 9/2599 useless extension candidates. Maximal degree in co-relation 16228. Up to 2296 conditions per place. [2024-06-27 19:19:10,499 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 242 selfloop transitions, 27 changer transitions 0/276 dead transitions. [2024-06-27 19:19:10,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 276 transitions, 3477 flow [2024-06-27 19:19:10,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:19:10,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:19:10,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-27 19:19:10,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-27 19:19:10,500 INFO L175 Difference]: Start difference. First operand has 220 places, 259 transitions, 2856 flow. Second operand 6 states and 136 transitions. [2024-06-27 19:19:10,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 276 transitions, 3477 flow [2024-06-27 19:19:10,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 276 transitions, 3277 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 19:19:10,709 INFO L231 Difference]: Finished difference. Result has 216 places, 260 transitions, 2730 flow [2024-06-27 19:19:10,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2656, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2730, PETRI_PLACES=216, PETRI_TRANSITIONS=260} [2024-06-27 19:19:10,709 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-27 19:19:10,709 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 260 transitions, 2730 flow [2024-06-27 19:19:10,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:10,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:10,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:10,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 19:19:10,710 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)] === [2024-06-27 19:19:10,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:10,710 INFO L85 PathProgramCache]: Analyzing trace with hash -378783157, now seen corresponding path program 5 times [2024-06-27 19:19:10,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:10,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787965044] [2024-06-27 19:19:10,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:10,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:10,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:10,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:10,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:10,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787965044] [2024-06-27 19:19:10,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787965044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:10,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:10,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:10,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916336936] [2024-06-27 19:19:10,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:10,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:10,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:10,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:10,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:10,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:10,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 260 transitions, 2730 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:10,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:10,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:10,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:11,227 INFO L124 PetriNetUnfolderBase]: 1557/2624 cut-off events. [2024-06-27 19:19:11,228 INFO L125 PetriNetUnfolderBase]: For 107392/107400 co-relation queries the response was YES. [2024-06-27 19:19:11,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16198 conditions, 2624 events. 1557/2624 cut-off events. For 107392/107400 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 15212 event pairs, 337 based on Foata normal form. 16/2639 useless extension candidates. Maximal degree in co-relation 16098. Up to 2289 conditions per place. [2024-06-27 19:19:11,248 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 248 selfloop transitions, 30 changer transitions 0/285 dead transitions. [2024-06-27 19:19:11,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 285 transitions, 3391 flow [2024-06-27 19:19:11,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:19:11,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:19:11,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-27 19:19:11,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553125 [2024-06-27 19:19:11,249 INFO L175 Difference]: Start difference. First operand has 216 places, 260 transitions, 2730 flow. Second operand 8 states and 177 transitions. [2024-06-27 19:19:11,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 285 transitions, 3391 flow [2024-06-27 19:19:11,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 285 transitions, 3334 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 19:19:11,456 INFO L231 Difference]: Finished difference. Result has 220 places, 261 transitions, 2758 flow [2024-06-27 19:19:11,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2673, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2758, PETRI_PLACES=220, PETRI_TRANSITIONS=261} [2024-06-27 19:19:11,457 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 179 predicate places. [2024-06-27 19:19:11,457 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 261 transitions, 2758 flow [2024-06-27 19:19:11,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:11,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:11,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:11,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 19:19:11,457 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)] === [2024-06-27 19:19:11,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:11,457 INFO L85 PathProgramCache]: Analyzing trace with hash -379109587, now seen corresponding path program 6 times [2024-06-27 19:19:11,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:11,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614335357] [2024-06-27 19:19:11,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:11,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:11,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:11,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:11,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:11,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614335357] [2024-06-27 19:19:11,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614335357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:11,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:11,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:11,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592091512] [2024-06-27 19:19:11,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:11,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:11,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:11,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:11,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:11,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:11,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 261 transitions, 2758 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:11,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:11,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:11,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:11,965 INFO L124 PetriNetUnfolderBase]: 1544/2605 cut-off events. [2024-06-27 19:19:11,965 INFO L125 PetriNetUnfolderBase]: For 102056/102064 co-relation queries the response was YES. [2024-06-27 19:19:11,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15913 conditions, 2605 events. 1544/2605 cut-off events. For 102056/102064 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 15112 event pairs, 245 based on Foata normal form. 14/2618 useless extension candidates. Maximal degree in co-relation 15812. Up to 2116 conditions per place. [2024-06-27 19:19:11,983 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 243 selfloop transitions, 41 changer transitions 0/291 dead transitions. [2024-06-27 19:19:11,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 291 transitions, 3444 flow [2024-06-27 19:19:11,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:19:11,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:19:11,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 19:19:11,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-27 19:19:11,984 INFO L175 Difference]: Start difference. First operand has 220 places, 261 transitions, 2758 flow. Second operand 8 states and 183 transitions. [2024-06-27 19:19:11,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 291 transitions, 3444 flow [2024-06-27 19:19:12,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 291 transitions, 3376 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 19:19:12,231 INFO L231 Difference]: Finished difference. Result has 222 places, 261 transitions, 2780 flow [2024-06-27 19:19:12,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2690, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2780, PETRI_PLACES=222, PETRI_TRANSITIONS=261} [2024-06-27 19:19:12,231 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-27 19:19:12,231 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 261 transitions, 2780 flow [2024-06-27 19:19:12,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:12,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:12,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:12,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 19:19:12,232 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)] === [2024-06-27 19:19:12,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:12,232 INFO L85 PathProgramCache]: Analyzing trace with hash -367658683, now seen corresponding path program 1 times [2024-06-27 19:19:12,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:12,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656048209] [2024-06-27 19:19:12,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:12,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:12,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:12,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:12,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:12,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656048209] [2024-06-27 19:19:12,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656048209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:12,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:12,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:12,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741928396] [2024-06-27 19:19:12,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:12,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:12,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:12,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:12,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:12,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:12,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 261 transitions, 2780 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:12,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:12,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:12,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:12,783 INFO L124 PetriNetUnfolderBase]: 1564/2634 cut-off events. [2024-06-27 19:19:12,783 INFO L125 PetriNetUnfolderBase]: For 102807/102811 co-relation queries the response was YES. [2024-06-27 19:19:12,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16113 conditions, 2634 events. 1564/2634 cut-off events. For 102807/102811 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 15239 event pairs, 335 based on Foata normal form. 7/2639 useless extension candidates. Maximal degree in co-relation 16011. Up to 2234 conditions per place. [2024-06-27 19:19:12,806 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 245 selfloop transitions, 32 changer transitions 0/284 dead transitions. [2024-06-27 19:19:12,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 284 transitions, 3456 flow [2024-06-27 19:19:12,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:19:12,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:19:12,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-27 19:19:12,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-27 19:19:12,806 INFO L175 Difference]: Start difference. First operand has 222 places, 261 transitions, 2780 flow. Second operand 6 states and 139 transitions. [2024-06-27 19:19:12,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 284 transitions, 3456 flow [2024-06-27 19:19:13,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 284 transitions, 3368 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 19:19:13,039 INFO L231 Difference]: Finished difference. Result has 222 places, 265 transitions, 2812 flow [2024-06-27 19:19:13,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2692, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2812, PETRI_PLACES=222, PETRI_TRANSITIONS=265} [2024-06-27 19:19:13,039 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-27 19:19:13,039 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 265 transitions, 2812 flow [2024-06-27 19:19:13,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:13,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:13,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:13,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 19:19:13,040 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)] === [2024-06-27 19:19:13,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:13,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1449083601, now seen corresponding path program 4 times [2024-06-27 19:19:13,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:13,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032575161] [2024-06-27 19:19:13,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:13,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:13,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:13,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:13,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:13,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032575161] [2024-06-27 19:19:13,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032575161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:13,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:13,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:13,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674965700] [2024-06-27 19:19:13,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:13,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:13,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:13,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:13,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:13,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:13,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 265 transitions, 2812 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:13,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:13,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:13,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:13,543 INFO L124 PetriNetUnfolderBase]: 1569/2648 cut-off events. [2024-06-27 19:19:13,543 INFO L125 PetriNetUnfolderBase]: For 93756/93770 co-relation queries the response was YES. [2024-06-27 19:19:13,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16139 conditions, 2648 events. 1569/2648 cut-off events. For 93756/93770 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 15454 event pairs, 361 based on Foata normal form. 15/2662 useless extension candidates. Maximal degree in co-relation 16036. Up to 2271 conditions per place. [2024-06-27 19:19:13,565 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 214 selfloop transitions, 65 changer transitions 0/286 dead transitions. [2024-06-27 19:19:13,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 286 transitions, 3610 flow [2024-06-27 19:19:13,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:19:13,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:19:13,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-27 19:19:13,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-27 19:19:13,565 INFO L175 Difference]: Start difference. First operand has 222 places, 265 transitions, 2812 flow. Second operand 7 states and 160 transitions. [2024-06-27 19:19:13,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 286 transitions, 3610 flow [2024-06-27 19:19:13,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 286 transitions, 3571 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-27 19:19:13,821 INFO L231 Difference]: Finished difference. Result has 227 places, 271 transitions, 3023 flow [2024-06-27 19:19:13,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2773, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3023, PETRI_PLACES=227, PETRI_TRANSITIONS=271} [2024-06-27 19:19:13,822 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 186 predicate places. [2024-06-27 19:19:13,822 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 271 transitions, 3023 flow [2024-06-27 19:19:13,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:13,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:13,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:13,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 19:19:13,823 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)] === [2024-06-27 19:19:13,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:13,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1111954481, now seen corresponding path program 5 times [2024-06-27 19:19:13,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:13,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958236069] [2024-06-27 19:19:13,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:13,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:13,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:13,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:13,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:13,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958236069] [2024-06-27 19:19:13,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958236069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:13,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:13,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:13,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242234004] [2024-06-27 19:19:13,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:13,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:13,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:13,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:13,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:14,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:14,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 271 transitions, 3023 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:14,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:14,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:14,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:14,373 INFO L124 PetriNetUnfolderBase]: 1566/2646 cut-off events. [2024-06-27 19:19:14,373 INFO L125 PetriNetUnfolderBase]: For 97261/97275 co-relation queries the response was YES. [2024-06-27 19:19:14,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16450 conditions, 2646 events. 1566/2646 cut-off events. For 97261/97275 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 15423 event pairs, 357 based on Foata normal form. 15/2660 useless extension candidates. Maximal degree in co-relation 16345. Up to 2331 conditions per place. [2024-06-27 19:19:14,395 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 247 selfloop transitions, 33 changer transitions 0/287 dead transitions. [2024-06-27 19:19:14,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 287 transitions, 3623 flow [2024-06-27 19:19:14,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:19:14,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:19:14,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-27 19:19:14,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-27 19:19:14,396 INFO L175 Difference]: Start difference. First operand has 227 places, 271 transitions, 3023 flow. Second operand 6 states and 141 transitions. [2024-06-27 19:19:14,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 287 transitions, 3623 flow [2024-06-27 19:19:14,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 287 transitions, 3503 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-27 19:19:14,655 INFO L231 Difference]: Finished difference. Result has 230 places, 271 transitions, 2975 flow [2024-06-27 19:19:14,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2903, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2975, PETRI_PLACES=230, PETRI_TRANSITIONS=271} [2024-06-27 19:19:14,655 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 189 predicate places. [2024-06-27 19:19:14,655 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 271 transitions, 2975 flow [2024-06-27 19:19:14,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:14,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:14,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:14,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 19:19:14,656 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)] === [2024-06-27 19:19:14,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:14,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1112370191, now seen corresponding path program 6 times [2024-06-27 19:19:14,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:14,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439018032] [2024-06-27 19:19:14,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:14,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:14,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:14,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:14,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439018032] [2024-06-27 19:19:14,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439018032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:14,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:14,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:14,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964232227] [2024-06-27 19:19:14,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:14,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:14,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:14,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:14,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:14,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:14,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 271 transitions, 2975 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:14,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:14,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:14,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:15,137 INFO L124 PetriNetUnfolderBase]: 1571/2651 cut-off events. [2024-06-27 19:19:15,137 INFO L125 PetriNetUnfolderBase]: For 99431/99443 co-relation queries the response was YES. [2024-06-27 19:19:15,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16393 conditions, 2651 events. 1571/2651 cut-off events. For 99431/99443 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 15464 event pairs, 361 based on Foata normal form. 13/2663 useless extension candidates. Maximal degree in co-relation 16286. Up to 2293 conditions per place. [2024-06-27 19:19:15,160 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 223 selfloop transitions, 58 changer transitions 0/288 dead transitions. [2024-06-27 19:19:15,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 288 transitions, 3727 flow [2024-06-27 19:19:15,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:19:15,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:19:15,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-27 19:19:15,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-27 19:19:15,161 INFO L175 Difference]: Start difference. First operand has 230 places, 271 transitions, 2975 flow. Second operand 6 states and 141 transitions. [2024-06-27 19:19:15,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 288 transitions, 3727 flow [2024-06-27 19:19:15,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 288 transitions, 3555 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 19:19:15,501 INFO L231 Difference]: Finished difference. Result has 229 places, 274 transitions, 2981 flow [2024-06-27 19:19:15,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2803, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2981, PETRI_PLACES=229, PETRI_TRANSITIONS=274} [2024-06-27 19:19:15,501 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 188 predicate places. [2024-06-27 19:19:15,501 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 274 transitions, 2981 flow [2024-06-27 19:19:15,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:15,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:15,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:15,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 19:19:15,502 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)] === [2024-06-27 19:19:15,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:15,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1117495235, now seen corresponding path program 10 times [2024-06-27 19:19:15,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:15,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373283950] [2024-06-27 19:19:15,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:15,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:15,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:15,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:15,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:15,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373283950] [2024-06-27 19:19:15,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373283950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:15,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:15,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:15,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980989895] [2024-06-27 19:19:15,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:15,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:15,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:15,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:15,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:15,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:15,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 274 transitions, 2981 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:15,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:15,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:15,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:15,996 INFO L124 PetriNetUnfolderBase]: 1576/2658 cut-off events. [2024-06-27 19:19:15,996 INFO L125 PetriNetUnfolderBase]: For 102895/102907 co-relation queries the response was YES. [2024-06-27 19:19:16,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16400 conditions, 2658 events. 1576/2658 cut-off events. For 102895/102907 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 15505 event pairs, 355 based on Foata normal form. 13/2670 useless extension candidates. Maximal degree in co-relation 16294. Up to 2300 conditions per place. [2024-06-27 19:19:16,019 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 220 selfloop transitions, 68 changer transitions 0/295 dead transitions. [2024-06-27 19:19:16,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 295 transitions, 3655 flow [2024-06-27 19:19:16,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:19:16,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:19:16,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-27 19:19:16,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2024-06-27 19:19:16,020 INFO L175 Difference]: Start difference. First operand has 229 places, 274 transitions, 2981 flow. Second operand 8 states and 181 transitions. [2024-06-27 19:19:16,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 295 transitions, 3655 flow [2024-06-27 19:19:16,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 295 transitions, 3491 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 19:19:16,272 INFO L231 Difference]: Finished difference. Result has 233 places, 277 transitions, 3023 flow [2024-06-27 19:19:16,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2817, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3023, PETRI_PLACES=233, PETRI_TRANSITIONS=277} [2024-06-27 19:19:16,272 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 192 predicate places. [2024-06-27 19:19:16,272 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 277 transitions, 3023 flow [2024-06-27 19:19:16,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:16,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:16,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:16,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 19:19:16,273 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)] === [2024-06-27 19:19:16,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:16,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1117495421, now seen corresponding path program 7 times [2024-06-27 19:19:16,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:16,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783542479] [2024-06-27 19:19:16,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:16,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:16,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:16,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:16,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783542479] [2024-06-27 19:19:16,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783542479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:16,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:16,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:16,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752400699] [2024-06-27 19:19:16,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:16,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:16,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:16,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:16,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:16,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:16,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 277 transitions, 3023 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:16,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:16,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:16,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:16,853 INFO L124 PetriNetUnfolderBase]: 1581/2669 cut-off events. [2024-06-27 19:19:16,853 INFO L125 PetriNetUnfolderBase]: For 106634/106646 co-relation queries the response was YES. [2024-06-27 19:19:16,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16734 conditions, 2669 events. 1581/2669 cut-off events. For 106634/106646 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 15586 event pairs, 357 based on Foata normal form. 13/2681 useless extension candidates. Maximal degree in co-relation 16627. Up to 2306 conditions per place. [2024-06-27 19:19:16,877 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 222 selfloop transitions, 68 changer transitions 0/297 dead transitions. [2024-06-27 19:19:16,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 297 transitions, 3803 flow [2024-06-27 19:19:16,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:19:16,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:19:16,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-27 19:19:16,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-06-27 19:19:16,878 INFO L175 Difference]: Start difference. First operand has 233 places, 277 transitions, 3023 flow. Second operand 9 states and 196 transitions. [2024-06-27 19:19:16,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 297 transitions, 3803 flow [2024-06-27 19:19:17,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 297 transitions, 3631 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 19:19:17,199 INFO L231 Difference]: Finished difference. Result has 236 places, 280 transitions, 3049 flow [2024-06-27 19:19:17,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2851, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3049, PETRI_PLACES=236, PETRI_TRANSITIONS=280} [2024-06-27 19:19:17,199 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 195 predicate places. [2024-06-27 19:19:17,199 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 280 transitions, 3049 flow [2024-06-27 19:19:17,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:17,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:17,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:17,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 19:19:17,200 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)] === [2024-06-27 19:19:17,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:17,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1117732571, now seen corresponding path program 8 times [2024-06-27 19:19:17,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:17,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516098812] [2024-06-27 19:19:17,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:17,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:17,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:17,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:17,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516098812] [2024-06-27 19:19:17,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516098812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:17,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:17,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:17,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844107257] [2024-06-27 19:19:17,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:17,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:17,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:17,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:17,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:17,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:17,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 280 transitions, 3049 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:17,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:17,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:17,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:17,674 INFO L124 PetriNetUnfolderBase]: 1578/2665 cut-off events. [2024-06-27 19:19:17,674 INFO L125 PetriNetUnfolderBase]: For 108576/108588 co-relation queries the response was YES. [2024-06-27 19:19:17,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16684 conditions, 2665 events. 1578/2665 cut-off events. For 108576/108588 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 15568 event pairs, 357 based on Foata normal form. 13/2677 useless extension candidates. Maximal degree in co-relation 16576. Up to 2303 conditions per place. [2024-06-27 19:19:17,695 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 223 selfloop transitions, 65 changer transitions 0/295 dead transitions. [2024-06-27 19:19:17,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 295 transitions, 3661 flow [2024-06-27 19:19:17,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:19:17,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:19:17,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-27 19:19:17,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553125 [2024-06-27 19:19:17,696 INFO L175 Difference]: Start difference. First operand has 236 places, 280 transitions, 3049 flow. Second operand 8 states and 177 transitions. [2024-06-27 19:19:17,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 295 transitions, 3661 flow [2024-06-27 19:19:18,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 295 transitions, 3402 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-27 19:19:18,037 INFO L231 Difference]: Finished difference. Result has 237 places, 280 transitions, 2926 flow [2024-06-27 19:19:18,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2790, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2926, PETRI_PLACES=237, PETRI_TRANSITIONS=280} [2024-06-27 19:19:18,037 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 196 predicate places. [2024-06-27 19:19:18,038 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 280 transitions, 2926 flow [2024-06-27 19:19:18,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:18,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:18,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:18,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 19:19:18,038 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)] === [2024-06-27 19:19:18,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:18,039 INFO L85 PathProgramCache]: Analyzing trace with hash 553585411, now seen corresponding path program 11 times [2024-06-27 19:19:18,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:18,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022312144] [2024-06-27 19:19:18,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:18,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:18,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:18,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:18,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:18,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022312144] [2024-06-27 19:19:18,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022312144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:18,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:18,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:18,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131552061] [2024-06-27 19:19:18,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:18,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:18,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:18,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:18,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:18,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:18,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 280 transitions, 2926 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:18,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:18,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:18,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:18,474 INFO L124 PetriNetUnfolderBase]: 1575/2654 cut-off events. [2024-06-27 19:19:18,474 INFO L125 PetriNetUnfolderBase]: For 110661/110669 co-relation queries the response was YES. [2024-06-27 19:19:18,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16458 conditions, 2654 events. 1575/2654 cut-off events. For 110661/110669 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 15449 event pairs, 377 based on Foata normal form. 6/2658 useless extension candidates. Maximal degree in co-relation 16350. Up to 2260 conditions per place. [2024-06-27 19:19:18,496 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 199 selfloop transitions, 88 changer transitions 0/294 dead transitions. [2024-06-27 19:19:18,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 294 transitions, 3586 flow [2024-06-27 19:19:18,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:19:18,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:19:18,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-27 19:19:18,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-27 19:19:18,497 INFO L175 Difference]: Start difference. First operand has 237 places, 280 transitions, 2926 flow. Second operand 7 states and 156 transitions. [2024-06-27 19:19:18,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 294 transitions, 3586 flow [2024-06-27 19:19:18,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 294 transitions, 3408 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 19:19:18,772 INFO L231 Difference]: Finished difference. Result has 236 places, 283 transitions, 2996 flow [2024-06-27 19:19:18,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2752, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2996, PETRI_PLACES=236, PETRI_TRANSITIONS=283} [2024-06-27 19:19:18,772 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 195 predicate places. [2024-06-27 19:19:18,772 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 283 transitions, 2996 flow [2024-06-27 19:19:18,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:18,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:18,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:18,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 19:19:18,773 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)] === [2024-06-27 19:19:18,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:18,773 INFO L85 PathProgramCache]: Analyzing trace with hash 553582435, now seen corresponding path program 7 times [2024-06-27 19:19:18,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:18,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622317367] [2024-06-27 19:19:18,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:18,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:18,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:18,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:18,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:18,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622317367] [2024-06-27 19:19:18,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622317367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:18,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:18,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:18,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577508941] [2024-06-27 19:19:18,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:18,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:18,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:18,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:18,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:18,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:18,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 283 transitions, 2996 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:18,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:18,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:18,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:19,270 INFO L124 PetriNetUnfolderBase]: 1590/2681 cut-off events. [2024-06-27 19:19:19,270 INFO L125 PetriNetUnfolderBase]: For 117900/117904 co-relation queries the response was YES. [2024-06-27 19:19:19,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16513 conditions, 2681 events. 1590/2681 cut-off events. For 117900/117904 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 15621 event pairs, 348 based on Foata normal form. 9/2688 useless extension candidates. Maximal degree in co-relation 16404. Up to 2369 conditions per place. [2024-06-27 19:19:19,292 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 262 selfloop transitions, 32 changer transitions 0/301 dead transitions. [2024-06-27 19:19:19,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 301 transitions, 3672 flow [2024-06-27 19:19:19,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:19:19,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:19:19,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-27 19:19:19,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-27 19:19:19,292 INFO L175 Difference]: Start difference. First operand has 236 places, 283 transitions, 2996 flow. Second operand 7 states and 154 transitions. [2024-06-27 19:19:19,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 301 transitions, 3672 flow [2024-06-27 19:19:19,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 301 transitions, 3450 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 19:19:19,574 INFO L231 Difference]: Finished difference. Result has 238 places, 284 transitions, 2857 flow [2024-06-27 19:19:19,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2774, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2857, PETRI_PLACES=238, PETRI_TRANSITIONS=284} [2024-06-27 19:19:19,575 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 197 predicate places. [2024-06-27 19:19:19,575 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 284 transitions, 2857 flow [2024-06-27 19:19:19,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:19,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:19,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:19,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 19:19:19,576 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)] === [2024-06-27 19:19:19,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:19,576 INFO L85 PathProgramCache]: Analyzing trace with hash 553982149, now seen corresponding path program 2 times [2024-06-27 19:19:19,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:19,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079443913] [2024-06-27 19:19:19,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:19,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:19,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:19,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:19,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:19,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079443913] [2024-06-27 19:19:19,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079443913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:19,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:19,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:19,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934275808] [2024-06-27 19:19:19,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:19,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:19,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:19,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:19,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:19,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:19,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 284 transitions, 2857 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:19,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:19,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:19,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:20,077 INFO L124 PetriNetUnfolderBase]: 1610/2717 cut-off events. [2024-06-27 19:19:20,077 INFO L125 PetriNetUnfolderBase]: For 118800/118804 co-relation queries the response was YES. [2024-06-27 19:19:20,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16646 conditions, 2717 events. 1610/2717 cut-off events. For 118800/118804 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 15899 event pairs, 348 based on Foata normal form. 7/2722 useless extension candidates. Maximal degree in co-relation 16536. Up to 2371 conditions per place. [2024-06-27 19:19:20,100 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 266 selfloop transitions, 34 changer transitions 0/307 dead transitions. [2024-06-27 19:19:20,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 307 transitions, 3587 flow [2024-06-27 19:19:20,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:19:20,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:19:20,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-27 19:19:20,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-27 19:19:20,101 INFO L175 Difference]: Start difference. First operand has 238 places, 284 transitions, 2857 flow. Second operand 7 states and 157 transitions. [2024-06-27 19:19:20,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 307 transitions, 3587 flow [2024-06-27 19:19:20,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 307 transitions, 3518 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 19:19:20,442 INFO L231 Difference]: Finished difference. Result has 241 places, 287 transitions, 2902 flow [2024-06-27 19:19:20,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2788, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2902, PETRI_PLACES=241, PETRI_TRANSITIONS=287} [2024-06-27 19:19:20,442 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 200 predicate places. [2024-06-27 19:19:20,442 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 287 transitions, 2902 flow [2024-06-27 19:19:20,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:20,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:20,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:20,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 19:19:20,443 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)] === [2024-06-27 19:19:20,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:20,443 INFO L85 PathProgramCache]: Analyzing trace with hash 996810949, now seen corresponding path program 3 times [2024-06-27 19:19:20,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:20,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475551526] [2024-06-27 19:19:20,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:20,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:20,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:20,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:20,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:20,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475551526] [2024-06-27 19:19:20,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475551526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:20,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:20,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:20,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871806058] [2024-06-27 19:19:20,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:20,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:20,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:20,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:20,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:20,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:20,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 287 transitions, 2902 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:20,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:20,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:20,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:20,969 INFO L124 PetriNetUnfolderBase]: 1597/2698 cut-off events. [2024-06-27 19:19:20,970 INFO L125 PetriNetUnfolderBase]: For 113402/113406 co-relation queries the response was YES. [2024-06-27 19:19:20,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16301 conditions, 2698 events. 1597/2698 cut-off events. For 113402/113406 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 15726 event pairs, 339 based on Foata normal form. 7/2703 useless extension candidates. Maximal degree in co-relation 16189. Up to 2188 conditions per place. [2024-06-27 19:19:20,988 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 262 selfloop transitions, 41 changer transitions 0/310 dead transitions. [2024-06-27 19:19:20,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 310 transitions, 3628 flow [2024-06-27 19:19:20,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:19:20,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:19:20,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-27 19:19:20,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-27 19:19:20,989 INFO L175 Difference]: Start difference. First operand has 241 places, 287 transitions, 2902 flow. Second operand 7 states and 157 transitions. [2024-06-27 19:19:20,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 310 transitions, 3628 flow [2024-06-27 19:19:21,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 310 transitions, 3546 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 19:19:21,315 INFO L231 Difference]: Finished difference. Result has 245 places, 289 transitions, 2931 flow [2024-06-27 19:19:21,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2822, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2931, PETRI_PLACES=245, PETRI_TRANSITIONS=289} [2024-06-27 19:19:21,316 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 204 predicate places. [2024-06-27 19:19:21,316 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 289 transitions, 2931 flow [2024-06-27 19:19:21,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:21,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:21,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:21,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 19:19:21,316 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)] === [2024-06-27 19:19:21,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:21,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1537788303, now seen corresponding path program 1 times [2024-06-27 19:19:21,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:21,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631885995] [2024-06-27 19:19:21,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:21,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:21,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:21,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:21,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631885995] [2024-06-27 19:19:21,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631885995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:21,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:21,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:21,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751766140] [2024-06-27 19:19:21,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:21,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:21,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:21,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:21,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:21,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:21,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 289 transitions, 2931 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:21,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:21,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:21,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:21,858 INFO L124 PetriNetUnfolderBase]: 1650/2787 cut-off events. [2024-06-27 19:19:21,858 INFO L125 PetriNetUnfolderBase]: For 126647/126651 co-relation queries the response was YES. [2024-06-27 19:19:21,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17058 conditions, 2787 events. 1650/2787 cut-off events. For 126647/126651 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 16396 event pairs, 346 based on Foata normal form. 10/2796 useless extension candidates. Maximal degree in co-relation 16944. Up to 2385 conditions per place. [2024-06-27 19:19:21,886 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 290 selfloop transitions, 28 changer transitions 0/325 dead transitions. [2024-06-27 19:19:21,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 325 transitions, 3851 flow [2024-06-27 19:19:21,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:19:21,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:19:21,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-27 19:19:21,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-27 19:19:21,886 INFO L175 Difference]: Start difference. First operand has 245 places, 289 transitions, 2931 flow. Second operand 7 states and 164 transitions. [2024-06-27 19:19:21,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 325 transitions, 3851 flow [2024-06-27 19:19:22,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 325 transitions, 3700 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 19:19:22,206 INFO L231 Difference]: Finished difference. Result has 248 places, 294 transitions, 2899 flow [2024-06-27 19:19:22,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2788, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2899, PETRI_PLACES=248, PETRI_TRANSITIONS=294} [2024-06-27 19:19:22,207 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 207 predicate places. [2024-06-27 19:19:22,207 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 294 transitions, 2899 flow [2024-06-27 19:19:22,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:22,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:22,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:22,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 19:19:22,207 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)] === [2024-06-27 19:19:22,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:22,208 INFO L85 PathProgramCache]: Analyzing trace with hash -568477521, now seen corresponding path program 2 times [2024-06-27 19:19:22,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:22,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883879304] [2024-06-27 19:19:22,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:22,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:22,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:22,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883879304] [2024-06-27 19:19:22,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883879304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:22,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:22,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:22,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504782801] [2024-06-27 19:19:22,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:22,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:22,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:22,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:22,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:22,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:22,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 294 transitions, 2899 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:22,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:22,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:22,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:22,746 INFO L124 PetriNetUnfolderBase]: 1678/2835 cut-off events. [2024-06-27 19:19:22,746 INFO L125 PetriNetUnfolderBase]: For 133770/133774 co-relation queries the response was YES. [2024-06-27 19:19:22,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17069 conditions, 2835 events. 1678/2835 cut-off events. For 133770/133774 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 16741 event pairs, 360 based on Foata normal form. 12/2846 useless extension candidates. Maximal degree in co-relation 16954. Up to 2525 conditions per place. [2024-06-27 19:19:22,772 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 283 selfloop transitions, 26 changer transitions 0/316 dead transitions. [2024-06-27 19:19:22,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 316 transitions, 3613 flow [2024-06-27 19:19:22,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:19:22,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:19:22,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-27 19:19:22,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-27 19:19:22,773 INFO L175 Difference]: Start difference. First operand has 248 places, 294 transitions, 2899 flow. Second operand 7 states and 157 transitions. [2024-06-27 19:19:22,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 316 transitions, 3613 flow [2024-06-27 19:19:23,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 316 transitions, 3581 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 19:19:23,201 INFO L231 Difference]: Finished difference. Result has 253 places, 295 transitions, 2935 flow [2024-06-27 19:19:23,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2867, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2935, PETRI_PLACES=253, PETRI_TRANSITIONS=295} [2024-06-27 19:19:23,201 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 212 predicate places. [2024-06-27 19:19:23,202 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 295 transitions, 2935 flow [2024-06-27 19:19:23,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:23,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:23,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:23,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 19:19:23,202 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)] === [2024-06-27 19:19:23,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:23,202 INFO L85 PathProgramCache]: Analyzing trace with hash -568625391, now seen corresponding path program 3 times [2024-06-27 19:19:23,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:23,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301765250] [2024-06-27 19:19:23,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:23,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:23,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:23,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:23,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:23,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301765250] [2024-06-27 19:19:23,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301765250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:23,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:23,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:23,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146398259] [2024-06-27 19:19:23,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:23,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:23,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:23,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:23,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:23,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:23,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 295 transitions, 2935 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:23,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:23,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:23,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:23,789 INFO L124 PetriNetUnfolderBase]: 1698/2867 cut-off events. [2024-06-27 19:19:23,789 INFO L125 PetriNetUnfolderBase]: For 135209/135213 co-relation queries the response was YES. [2024-06-27 19:19:23,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17411 conditions, 2867 events. 1698/2867 cut-off events. For 135209/135213 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 17034 event pairs, 358 based on Foata normal form. 10/2876 useless extension candidates. Maximal degree in co-relation 17294. Up to 2527 conditions per place. [2024-06-27 19:19:23,819 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 287 selfloop transitions, 28 changer transitions 0/322 dead transitions. [2024-06-27 19:19:23,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 322 transitions, 3701 flow [2024-06-27 19:19:23,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:19:23,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:19:23,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-27 19:19:23,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-27 19:19:23,820 INFO L175 Difference]: Start difference. First operand has 253 places, 295 transitions, 2935 flow. Second operand 7 states and 160 transitions. [2024-06-27 19:19:23,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 322 transitions, 3701 flow [2024-06-27 19:19:24,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 322 transitions, 3650 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 19:19:24,151 INFO L231 Difference]: Finished difference. Result has 256 places, 298 transitions, 2981 flow [2024-06-27 19:19:24,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2884, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2981, PETRI_PLACES=256, PETRI_TRANSITIONS=298} [2024-06-27 19:19:24,151 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 215 predicate places. [2024-06-27 19:19:24,151 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 298 transitions, 2981 flow [2024-06-27 19:19:24,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:24,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:24,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:24,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 19:19:24,152 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)] === [2024-06-27 19:19:24,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:24,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1117741499, now seen corresponding path program 4 times [2024-06-27 19:19:24,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:24,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232376050] [2024-06-27 19:19:24,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:24,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:24,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:24,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:24,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232376050] [2024-06-27 19:19:24,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232376050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:24,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:24,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:24,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946901333] [2024-06-27 19:19:24,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:24,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:24,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:24,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:24,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:24,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:24,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 298 transitions, 2981 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:24,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:24,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:24,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:24,698 INFO L124 PetriNetUnfolderBase]: 1726/2911 cut-off events. [2024-06-27 19:19:24,698 INFO L125 PetriNetUnfolderBase]: For 143936/143940 co-relation queries the response was YES. [2024-06-27 19:19:24,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17802 conditions, 2911 events. 1726/2911 cut-off events. For 143936/143940 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 17311 event pairs, 366 based on Foata normal form. 12/2922 useless extension candidates. Maximal degree in co-relation 17683. Up to 2607 conditions per place. [2024-06-27 19:19:24,723 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 291 selfloop transitions, 23 changer transitions 0/321 dead transitions. [2024-06-27 19:19:24,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 321 transitions, 3711 flow [2024-06-27 19:19:24,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:19:24,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:19:24,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-27 19:19:24,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-27 19:19:24,724 INFO L175 Difference]: Start difference. First operand has 256 places, 298 transitions, 2981 flow. Second operand 8 states and 174 transitions. [2024-06-27 19:19:24,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 321 transitions, 3711 flow [2024-06-27 19:19:25,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 321 transitions, 3677 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 19:19:25,135 INFO L231 Difference]: Finished difference. Result has 261 places, 299 transitions, 3013 flow [2024-06-27 19:19:25,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2947, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3013, PETRI_PLACES=261, PETRI_TRANSITIONS=299} [2024-06-27 19:19:25,136 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 220 predicate places. [2024-06-27 19:19:25,136 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 299 transitions, 3013 flow [2024-06-27 19:19:25,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:25,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:25,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:25,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 19:19:25,136 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)] === [2024-06-27 19:19:25,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:25,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1112234969, now seen corresponding path program 5 times [2024-06-27 19:19:25,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:25,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006839833] [2024-06-27 19:19:25,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:25,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:25,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:25,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:25,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006839833] [2024-06-27 19:19:25,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006839833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:25,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:25,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:25,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815583665] [2024-06-27 19:19:25,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:25,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:25,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:25,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:25,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:25,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:25,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 299 transitions, 3013 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:25,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:25,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:25,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:25,711 INFO L124 PetriNetUnfolderBase]: 1741/2940 cut-off events. [2024-06-27 19:19:25,711 INFO L125 PetriNetUnfolderBase]: For 144159/144163 co-relation queries the response was YES. [2024-06-27 19:19:25,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17990 conditions, 2940 events. 1741/2940 cut-off events. For 144159/144163 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 17515 event pairs, 373 based on Foata normal form. 12/2951 useless extension candidates. Maximal degree in co-relation 17869. Up to 2632 conditions per place. [2024-06-27 19:19:25,737 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 292 selfloop transitions, 21 changer transitions 0/320 dead transitions. [2024-06-27 19:19:25,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 320 transitions, 3739 flow [2024-06-27 19:19:25,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:19:25,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:19:25,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-27 19:19:25,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-27 19:19:25,738 INFO L175 Difference]: Start difference. First operand has 261 places, 299 transitions, 3013 flow. Second operand 6 states and 139 transitions. [2024-06-27 19:19:25,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 320 transitions, 3739 flow [2024-06-27 19:19:26,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 320 transitions, 3690 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 19:19:26,139 INFO L231 Difference]: Finished difference. Result has 261 places, 300 transitions, 3028 flow [2024-06-27 19:19:26,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2964, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3028, PETRI_PLACES=261, PETRI_TRANSITIONS=300} [2024-06-27 19:19:26,139 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 220 predicate places. [2024-06-27 19:19:26,140 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 300 transitions, 3028 flow [2024-06-27 19:19:26,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:26,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:26,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:26,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 19:19:26,140 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)] === [2024-06-27 19:19:26,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:26,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1112231249, now seen corresponding path program 6 times [2024-06-27 19:19:26,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:26,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219034793] [2024-06-27 19:19:26,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:26,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:26,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:26,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:26,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219034793] [2024-06-27 19:19:26,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219034793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:26,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:26,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:26,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554966148] [2024-06-27 19:19:26,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:26,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:26,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:26,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:26,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:26,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:26,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 300 transitions, 3028 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:26,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:26,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:26,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:26,712 INFO L124 PetriNetUnfolderBase]: 1728/2921 cut-off events. [2024-06-27 19:19:26,712 INFO L125 PetriNetUnfolderBase]: For 133425/133429 co-relation queries the response was YES. [2024-06-27 19:19:26,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17580 conditions, 2921 events. 1728/2921 cut-off events. For 133425/133429 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 17374 event pairs, 352 based on Foata normal form. 10/2930 useless extension candidates. Maximal degree in co-relation 17458. Up to 2533 conditions per place. [2024-06-27 19:19:26,739 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 296 selfloop transitions, 25 changer transitions 0/328 dead transitions. [2024-06-27 19:19:26,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 328 transitions, 3807 flow [2024-06-27 19:19:26,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:19:26,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:19:26,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 19:19:26,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-27 19:19:26,740 INFO L175 Difference]: Start difference. First operand has 261 places, 300 transitions, 3028 flow. Second operand 6 states and 145 transitions. [2024-06-27 19:19:26,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 328 transitions, 3807 flow [2024-06-27 19:19:27,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 328 transitions, 3756 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 19:19:27,090 INFO L231 Difference]: Finished difference. Result has 264 places, 302 transitions, 3066 flow [2024-06-27 19:19:27,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2979, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3066, PETRI_PLACES=264, PETRI_TRANSITIONS=302} [2024-06-27 19:19:27,090 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 223 predicate places. [2024-06-27 19:19:27,090 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 302 transitions, 3066 flow [2024-06-27 19:19:27,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:27,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:27,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:27,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 19:19:27,091 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)] === [2024-06-27 19:19:27,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:27,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1117956701, now seen corresponding path program 1 times [2024-06-27 19:19:27,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:27,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810511440] [2024-06-27 19:19:27,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:27,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:27,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:27,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:27,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:27,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810511440] [2024-06-27 19:19:27,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810511440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:27,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:27,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:27,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129628568] [2024-06-27 19:19:27,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:27,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:27,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:27,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:27,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:27,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:27,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 302 transitions, 3066 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:27,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:27,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:27,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:27,696 INFO L124 PetriNetUnfolderBase]: 1715/2894 cut-off events. [2024-06-27 19:19:27,696 INFO L125 PetriNetUnfolderBase]: For 125423/125427 co-relation queries the response was YES. [2024-06-27 19:19:27,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17217 conditions, 2894 events. 1715/2894 cut-off events. For 125423/125427 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 17179 event pairs, 341 based on Foata normal form. 10/2903 useless extension candidates. Maximal degree in co-relation 17093. Up to 2522 conditions per place. [2024-06-27 19:19:27,719 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 293 selfloop transitions, 28 changer transitions 0/328 dead transitions. [2024-06-27 19:19:27,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 328 transitions, 3823 flow [2024-06-27 19:19:27,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:19:27,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:19:27,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-27 19:19:27,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553125 [2024-06-27 19:19:27,720 INFO L175 Difference]: Start difference. First operand has 264 places, 302 transitions, 3066 flow. Second operand 8 states and 177 transitions. [2024-06-27 19:19:27,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 328 transitions, 3823 flow [2024-06-27 19:19:28,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 328 transitions, 3737 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 19:19:28,156 INFO L231 Difference]: Finished difference. Result has 267 places, 302 transitions, 3040 flow [2024-06-27 19:19:28,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2980, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3040, PETRI_PLACES=267, PETRI_TRANSITIONS=302} [2024-06-27 19:19:28,156 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 226 predicate places. [2024-06-27 19:19:28,156 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 302 transitions, 3040 flow [2024-06-27 19:19:28,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:28,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:28,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:28,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 19:19:28,157 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)] === [2024-06-27 19:19:28,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:28,157 INFO L85 PathProgramCache]: Analyzing trace with hash -2066324371, now seen corresponding path program 1 times [2024-06-27 19:19:28,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:28,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139237248] [2024-06-27 19:19:28,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:28,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:28,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:28,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139237248] [2024-06-27 19:19:28,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139237248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:28,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:28,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:19:28,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442660018] [2024-06-27 19:19:28,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:28,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:19:28,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:28,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:19:28,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:19:28,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:28,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 302 transitions, 3040 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:28,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:28,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:28,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:28,791 INFO L124 PetriNetUnfolderBase]: 1736/2931 cut-off events. [2024-06-27 19:19:28,791 INFO L125 PetriNetUnfolderBase]: For 123274/123282 co-relation queries the response was YES. [2024-06-27 19:19:28,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17481 conditions, 2931 events. 1736/2931 cut-off events. For 123274/123282 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 17487 event pairs, 397 based on Foata normal form. 9/2938 useless extension candidates. Maximal degree in co-relation 17357. Up to 2352 conditions per place. [2024-06-27 19:19:28,820 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 175 selfloop transitions, 159 changer transitions 0/341 dead transitions. [2024-06-27 19:19:28,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 341 transitions, 4186 flow [2024-06-27 19:19:28,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:19:28,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:19:28,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 265 transitions. [2024-06-27 19:19:28,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5520833333333334 [2024-06-27 19:19:28,821 INFO L175 Difference]: Start difference. First operand has 267 places, 302 transitions, 3040 flow. Second operand 12 states and 265 transitions. [2024-06-27 19:19:28,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 341 transitions, 4186 flow [2024-06-27 19:19:29,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 341 transitions, 4108 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 19:19:29,353 INFO L231 Difference]: Finished difference. Result has 272 places, 311 transitions, 3442 flow [2024-06-27 19:19:29,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2962, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3442, PETRI_PLACES=272, PETRI_TRANSITIONS=311} [2024-06-27 19:19:29,354 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 231 predicate places. [2024-06-27 19:19:29,354 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 311 transitions, 3442 flow [2024-06-27 19:19:29,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:29,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:29,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:29,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 19:19:29,354 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)] === [2024-06-27 19:19:29,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:29,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1972116713, now seen corresponding path program 2 times [2024-06-27 19:19:29,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:29,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336261660] [2024-06-27 19:19:29,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:29,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:29,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:29,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:29,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:29,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336261660] [2024-06-27 19:19:29,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336261660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:29,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:29,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:19:29,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098395893] [2024-06-27 19:19:29,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:29,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:19:29,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:29,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:19:29,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:19:29,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:29,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 311 transitions, 3442 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:29,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:29,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:29,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:29,974 INFO L124 PetriNetUnfolderBase]: 1749/2954 cut-off events. [2024-06-27 19:19:29,974 INFO L125 PetriNetUnfolderBase]: For 131606/131618 co-relation queries the response was YES. [2024-06-27 19:19:29,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18176 conditions, 2954 events. 1749/2954 cut-off events. For 131606/131618 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 17638 event pairs, 380 based on Foata normal form. 13/2966 useless extension candidates. Maximal degree in co-relation 18052. Up to 2542 conditions per place. [2024-06-27 19:19:30,001 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 240 selfloop transitions, 96 changer transitions 0/343 dead transitions. [2024-06-27 19:19:30,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 343 transitions, 4418 flow [2024-06-27 19:19:30,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:19:30,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:19:30,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 257 transitions. [2024-06-27 19:19:30,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5354166666666667 [2024-06-27 19:19:30,058 INFO L175 Difference]: Start difference. First operand has 272 places, 311 transitions, 3442 flow. Second operand 12 states and 257 transitions. [2024-06-27 19:19:30,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 343 transitions, 4418 flow [2024-06-27 19:19:30,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 343 transitions, 4097 flow, removed 77 selfloop flow, removed 7 redundant places. [2024-06-27 19:19:30,551 INFO L231 Difference]: Finished difference. Result has 277 places, 317 transitions, 3439 flow [2024-06-27 19:19:30,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3179, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3439, PETRI_PLACES=277, PETRI_TRANSITIONS=317} [2024-06-27 19:19:30,552 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 236 predicate places. [2024-06-27 19:19:30,552 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 317 transitions, 3439 flow [2024-06-27 19:19:30,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:30,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:30,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:30,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 19:19:30,552 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)] === [2024-06-27 19:19:30,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:30,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1972122293, now seen corresponding path program 3 times [2024-06-27 19:19:30,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:30,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759695604] [2024-06-27 19:19:30,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:30,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:30,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:30,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:30,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759695604] [2024-06-27 19:19:30,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759695604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:30,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:30,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:19:30,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293526144] [2024-06-27 19:19:30,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:30,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:19:30,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:30,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:19:30,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:19:30,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:30,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 317 transitions, 3439 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:30,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:30,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:30,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:31,178 INFO L124 PetriNetUnfolderBase]: 1746/2950 cut-off events. [2024-06-27 19:19:31,178 INFO L125 PetriNetUnfolderBase]: For 128633/128645 co-relation queries the response was YES. [2024-06-27 19:19:31,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18040 conditions, 2950 events. 1746/2950 cut-off events. For 128633/128645 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 17658 event pairs, 380 based on Foata normal form. 13/2962 useless extension candidates. Maximal degree in co-relation 17914. Up to 2539 conditions per place. [2024-06-27 19:19:31,206 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 240 selfloop transitions, 96 changer transitions 0/343 dead transitions. [2024-06-27 19:19:31,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 343 transitions, 4173 flow [2024-06-27 19:19:31,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 19:19:31,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 19:19:31,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 273 transitions. [2024-06-27 19:19:31,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-27 19:19:31,207 INFO L175 Difference]: Start difference. First operand has 277 places, 317 transitions, 3439 flow. Second operand 13 states and 273 transitions. [2024-06-27 19:19:31,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 343 transitions, 4173 flow [2024-06-27 19:19:31,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 343 transitions, 4030 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-27 19:19:31,758 INFO L231 Difference]: Finished difference. Result has 282 places, 317 transitions, 3494 flow [2024-06-27 19:19:31,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3296, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3494, PETRI_PLACES=282, PETRI_TRANSITIONS=317} [2024-06-27 19:19:31,759 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 241 predicate places. [2024-06-27 19:19:31,759 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 317 transitions, 3494 flow [2024-06-27 19:19:31,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:31,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:31,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:31,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 19:19:31,759 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)] === [2024-06-27 19:19:31,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:31,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1119383529, now seen corresponding path program 4 times [2024-06-27 19:19:31,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:31,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992778175] [2024-06-27 19:19:31,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:31,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:31,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:31,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:31,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:31,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992778175] [2024-06-27 19:19:31,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992778175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:31,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:31,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:19:31,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816882638] [2024-06-27 19:19:31,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:31,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:19:31,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:31,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:19:31,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:19:31,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:31,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 317 transitions, 3494 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:31,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:31,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:31,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:32,385 INFO L124 PetriNetUnfolderBase]: 1767/2985 cut-off events. [2024-06-27 19:19:32,386 INFO L125 PetriNetUnfolderBase]: For 136542/136554 co-relation queries the response was YES. [2024-06-27 19:19:32,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18546 conditions, 2985 events. 1767/2985 cut-off events. For 136542/136554 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 17868 event pairs, 380 based on Foata normal form. 13/2997 useless extension candidates. Maximal degree in co-relation 18418. Up to 2547 conditions per place. [2024-06-27 19:19:32,412 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 234 selfloop transitions, 108 changer transitions 0/349 dead transitions. [2024-06-27 19:19:32,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 349 transitions, 4468 flow [2024-06-27 19:19:32,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:19:32,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:19:32,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 254 transitions. [2024-06-27 19:19:32,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-06-27 19:19:32,413 INFO L175 Difference]: Start difference. First operand has 282 places, 317 transitions, 3494 flow. Second operand 12 states and 254 transitions. [2024-06-27 19:19:32,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 349 transitions, 4468 flow [2024-06-27 19:19:32,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 349 transitions, 4272 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-27 19:19:33,003 INFO L231 Difference]: Finished difference. Result has 283 places, 326 transitions, 3654 flow [2024-06-27 19:19:33,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3298, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3654, PETRI_PLACES=283, PETRI_TRANSITIONS=326} [2024-06-27 19:19:33,003 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 242 predicate places. [2024-06-27 19:19:33,003 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 326 transitions, 3654 flow [2024-06-27 19:19:33,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:33,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:33,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:33,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 19:19:33,004 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)] === [2024-06-27 19:19:33,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:33,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1126735179, now seen corresponding path program 5 times [2024-06-27 19:19:33,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:33,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661735370] [2024-06-27 19:19:33,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:33,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:33,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:33,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:33,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661735370] [2024-06-27 19:19:33,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661735370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:33,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:33,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:19:33,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212108927] [2024-06-27 19:19:33,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:33,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:19:33,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:33,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:19:33,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:19:33,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:33,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 326 transitions, 3654 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:33,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:33,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:33,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:33,752 INFO L124 PetriNetUnfolderBase]: 1772/2994 cut-off events. [2024-06-27 19:19:33,752 INFO L125 PetriNetUnfolderBase]: For 140457/140469 co-relation queries the response was YES. [2024-06-27 19:19:33,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18738 conditions, 2994 events. 1772/2994 cut-off events. For 140457/140469 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 17944 event pairs, 380 based on Foata normal form. 13/3006 useless extension candidates. Maximal degree in co-relation 18608. Up to 2553 conditions per place. [2024-06-27 19:19:33,783 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 239 selfloop transitions, 110 changer transitions 0/356 dead transitions. [2024-06-27 19:19:33,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 356 transitions, 4725 flow [2024-06-27 19:19:33,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 19:19:33,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 19:19:33,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 311 transitions. [2024-06-27 19:19:33,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5183333333333333 [2024-06-27 19:19:33,784 INFO L175 Difference]: Start difference. First operand has 283 places, 326 transitions, 3654 flow. Second operand 15 states and 311 transitions. [2024-06-27 19:19:33,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 356 transitions, 4725 flow [2024-06-27 19:19:34,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 356 transitions, 4572 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 19:19:34,475 INFO L231 Difference]: Finished difference. Result has 290 places, 329 transitions, 3770 flow [2024-06-27 19:19:34,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3501, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3770, PETRI_PLACES=290, PETRI_TRANSITIONS=329} [2024-06-27 19:19:34,475 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 249 predicate places. [2024-06-27 19:19:34,475 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 329 transitions, 3770 flow [2024-06-27 19:19:34,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:34,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:34,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:34,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 19:19:34,475 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)] === [2024-06-27 19:19:34,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:34,476 INFO L85 PathProgramCache]: Analyzing trace with hash -558375965, now seen corresponding path program 6 times [2024-06-27 19:19:34,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:34,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274701078] [2024-06-27 19:19:34,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:34,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:34,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:34,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:34,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:34,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274701078] [2024-06-27 19:19:34,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274701078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:34,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:34,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:19:34,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847141715] [2024-06-27 19:19:34,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:34,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:19:34,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:34,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:19:34,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:19:34,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:34,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 329 transitions, 3770 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:34,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:34,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:34,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:35,131 INFO L124 PetriNetUnfolderBase]: 1769/2990 cut-off events. [2024-06-27 19:19:35,131 INFO L125 PetriNetUnfolderBase]: For 141854/141866 co-relation queries the response was YES. [2024-06-27 19:19:35,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18859 conditions, 2990 events. 1769/2990 cut-off events. For 141854/141866 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 17918 event pairs, 380 based on Foata normal form. 13/3002 useless extension candidates. Maximal degree in co-relation 18727. Up to 2550 conditions per place. [2024-06-27 19:19:35,161 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 236 selfloop transitions, 110 changer transitions 0/353 dead transitions. [2024-06-27 19:19:35,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 353 transitions, 4654 flow [2024-06-27 19:19:35,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 19:19:35,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 19:19:35,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 274 transitions. [2024-06-27 19:19:35,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5269230769230769 [2024-06-27 19:19:35,162 INFO L175 Difference]: Start difference. First operand has 290 places, 329 transitions, 3770 flow. Second operand 13 states and 274 transitions. [2024-06-27 19:19:35,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 353 transitions, 4654 flow [2024-06-27 19:19:35,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 353 transitions, 4346 flow, removed 22 selfloop flow, removed 12 redundant places. [2024-06-27 19:19:35,910 INFO L231 Difference]: Finished difference. Result has 291 places, 329 transitions, 3688 flow [2024-06-27 19:19:35,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3462, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3688, PETRI_PLACES=291, PETRI_TRANSITIONS=329} [2024-06-27 19:19:35,910 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 250 predicate places. [2024-06-27 19:19:35,910 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 329 transitions, 3688 flow [2024-06-27 19:19:35,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:35,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:35,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:35,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 19:19:35,911 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)] === [2024-06-27 19:19:35,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:35,911 INFO L85 PathProgramCache]: Analyzing trace with hash -401079187, now seen corresponding path program 7 times [2024-06-27 19:19:35,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:35,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946687574] [2024-06-27 19:19:35,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:35,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:35,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:36,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:36,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946687574] [2024-06-27 19:19:36,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946687574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:36,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:36,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:19:36,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196458871] [2024-06-27 19:19:36,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:36,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:19:36,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:36,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:19:36,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:19:36,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:36,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 329 transitions, 3688 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:36,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:36,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:36,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:36,616 INFO L124 PetriNetUnfolderBase]: 1782/3011 cut-off events. [2024-06-27 19:19:36,616 INFO L125 PetriNetUnfolderBase]: For 148127/148135 co-relation queries the response was YES. [2024-06-27 19:19:36,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18925 conditions, 3011 events. 1782/3011 cut-off events. For 148127/148135 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 18067 event pairs, 397 based on Foata normal form. 9/3018 useless extension candidates. Maximal degree in co-relation 18793. Up to 2491 conditions per place. [2024-06-27 19:19:36,647 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 235 selfloop transitions, 116 changer transitions 0/358 dead transitions. [2024-06-27 19:19:36,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 358 transitions, 4806 flow [2024-06-27 19:19:36,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:19:36,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:19:36,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-27 19:19:36,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.590625 [2024-06-27 19:19:36,648 INFO L175 Difference]: Start difference. First operand has 291 places, 329 transitions, 3688 flow. Second operand 8 states and 189 transitions. [2024-06-27 19:19:36,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 358 transitions, 4806 flow [2024-06-27 19:19:37,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 358 transitions, 4586 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-27 19:19:37,356 INFO L231 Difference]: Finished difference. Result has 287 places, 335 transitions, 3790 flow [2024-06-27 19:19:37,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3468, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3790, PETRI_PLACES=287, PETRI_TRANSITIONS=335} [2024-06-27 19:19:37,356 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 246 predicate places. [2024-06-27 19:19:37,356 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 335 transitions, 3790 flow [2024-06-27 19:19:37,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:37,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:37,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:37,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 19:19:37,357 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)] === [2024-06-27 19:19:37,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:37,357 INFO L85 PathProgramCache]: Analyzing trace with hash -397354537, now seen corresponding path program 8 times [2024-06-27 19:19:37,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:37,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737045224] [2024-06-27 19:19:37,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:37,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:37,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:37,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:37,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:37,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737045224] [2024-06-27 19:19:37,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737045224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:37,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:37,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:19:37,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734221128] [2024-06-27 19:19:37,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:37,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:19:37,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:37,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:19:37,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:19:37,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:37,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 335 transitions, 3790 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:37,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:37,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:37,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:38,113 INFO L124 PetriNetUnfolderBase]: 1787/3021 cut-off events. [2024-06-27 19:19:38,113 INFO L125 PetriNetUnfolderBase]: For 152287/152299 co-relation queries the response was YES. [2024-06-27 19:19:38,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19080 conditions, 3021 events. 1787/3021 cut-off events. For 152287/152299 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 18131 event pairs, 380 based on Foata normal form. 13/3033 useless extension candidates. Maximal degree in co-relation 18947. Up to 2631 conditions per place. [2024-06-27 19:19:38,144 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 286 selfloop transitions, 66 changer transitions 0/359 dead transitions. [2024-06-27 19:19:38,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 359 transitions, 4730 flow [2024-06-27 19:19:38,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:19:38,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:19:38,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-27 19:19:38,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.545 [2024-06-27 19:19:38,145 INFO L175 Difference]: Start difference. First operand has 287 places, 335 transitions, 3790 flow. Second operand 10 states and 218 transitions. [2024-06-27 19:19:38,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 359 transitions, 4730 flow [2024-06-27 19:19:38,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 359 transitions, 4530 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 19:19:38,899 INFO L231 Difference]: Finished difference. Result has 293 places, 338 transitions, 3774 flow [2024-06-27 19:19:38,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3593, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3774, PETRI_PLACES=293, PETRI_TRANSITIONS=338} [2024-06-27 19:19:38,900 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 252 predicate places. [2024-06-27 19:19:38,900 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 338 transitions, 3774 flow [2024-06-27 19:19:38,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:38,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:38,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:38,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 19:19:38,900 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)] === [2024-06-27 19:19:38,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:38,901 INFO L85 PathProgramCache]: Analyzing trace with hash -234845407, now seen corresponding path program 9 times [2024-06-27 19:19:38,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:38,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752807602] [2024-06-27 19:19:38,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:38,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:38,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:39,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:39,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:39,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752807602] [2024-06-27 19:19:39,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752807602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:39,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:39,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:19:39,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483196431] [2024-06-27 19:19:39,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:39,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:19:39,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:39,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:19:39,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:19:39,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:39,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 338 transitions, 3774 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:39,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:39,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:39,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:39,551 INFO L124 PetriNetUnfolderBase]: 1792/3030 cut-off events. [2024-06-27 19:19:39,551 INFO L125 PetriNetUnfolderBase]: For 156272/156284 co-relation queries the response was YES. [2024-06-27 19:19:39,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19066 conditions, 3030 events. 1792/3030 cut-off events. For 156272/156284 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 18230 event pairs, 380 based on Foata normal form. 13/3042 useless extension candidates. Maximal degree in co-relation 18932. Up to 2503 conditions per place. [2024-06-27 19:19:39,581 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 238 selfloop transitions, 128 changer transitions 0/373 dead transitions. [2024-06-27 19:19:39,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 373 transitions, 4907 flow [2024-06-27 19:19:39,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:19:39,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:19:39,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 251 transitions. [2024-06-27 19:19:39,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5704545454545454 [2024-06-27 19:19:39,582 INFO L175 Difference]: Start difference. First operand has 293 places, 338 transitions, 3774 flow. Second operand 11 states and 251 transitions. [2024-06-27 19:19:39,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 373 transitions, 4907 flow [2024-06-27 19:19:40,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 373 transitions, 4723 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-27 19:19:40,410 INFO L231 Difference]: Finished difference. Result has 295 places, 341 transitions, 3891 flow [2024-06-27 19:19:40,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3590, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3891, PETRI_PLACES=295, PETRI_TRANSITIONS=341} [2024-06-27 19:19:40,411 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 254 predicate places. [2024-06-27 19:19:40,411 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 341 transitions, 3891 flow [2024-06-27 19:19:40,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:40,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:40,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:40,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 19:19:40,411 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)] === [2024-06-27 19:19:40,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:40,411 INFO L85 PathProgramCache]: Analyzing trace with hash -397360117, now seen corresponding path program 10 times [2024-06-27 19:19:40,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:40,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127716244] [2024-06-27 19:19:40,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:40,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:40,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:40,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:40,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:40,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127716244] [2024-06-27 19:19:40,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127716244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:40,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:40,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:19:40,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960671467] [2024-06-27 19:19:40,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:40,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:19:40,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:40,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:19:40,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:19:40,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:40,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 341 transitions, 3891 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:40,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:40,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:40,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:41,066 INFO L124 PetriNetUnfolderBase]: 1789/3026 cut-off events. [2024-06-27 19:19:41,066 INFO L125 PetriNetUnfolderBase]: For 157959/157971 co-relation queries the response was YES. [2024-06-27 19:19:41,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19153 conditions, 3026 events. 1789/3026 cut-off events. For 157959/157971 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 18213 event pairs, 380 based on Foata normal form. 13/3038 useless extension candidates. Maximal degree in co-relation 19018. Up to 2635 conditions per place. [2024-06-27 19:19:41,100 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 288 selfloop transitions, 64 changer transitions 0/359 dead transitions. [2024-06-27 19:19:41,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 359 transitions, 4639 flow [2024-06-27 19:19:41,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:19:41,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:19:41,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-27 19:19:41,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-27 19:19:41,102 INFO L175 Difference]: Start difference. First operand has 295 places, 341 transitions, 3891 flow. Second operand 8 states and 182 transitions. [2024-06-27 19:19:41,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 359 transitions, 4639 flow [2024-06-27 19:19:41,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 359 transitions, 4299 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-27 19:19:41,886 INFO L231 Difference]: Finished difference. Result has 294 places, 341 transitions, 3685 flow [2024-06-27 19:19:41,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3551, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3685, PETRI_PLACES=294, PETRI_TRANSITIONS=341} [2024-06-27 19:19:41,886 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 253 predicate places. [2024-06-27 19:19:41,887 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 341 transitions, 3685 flow [2024-06-27 19:19:41,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:41,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:41,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:41,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 19:19:41,887 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)] === [2024-06-27 19:19:41,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:41,888 INFO L85 PathProgramCache]: Analyzing trace with hash -225590977, now seen corresponding path program 11 times [2024-06-27 19:19:41,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:41,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033632289] [2024-06-27 19:19:41,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:41,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:41,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:41,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:41,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:41,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033632289] [2024-06-27 19:19:41,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033632289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:41,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:41,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:19:41,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089562356] [2024-06-27 19:19:41,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:41,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:19:41,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:41,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:19:41,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:19:42,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:42,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 341 transitions, 3685 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:42,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:42,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:42,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:42,620 INFO L124 PetriNetUnfolderBase]: 1802/3048 cut-off events. [2024-06-27 19:19:42,621 INFO L125 PetriNetUnfolderBase]: For 163498/163510 co-relation queries the response was YES. [2024-06-27 19:19:42,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19150 conditions, 3048 events. 1802/3048 cut-off events. For 163498/163510 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 18376 event pairs, 380 based on Foata normal form. 13/3060 useless extension candidates. Maximal degree in co-relation 19014. Up to 2515 conditions per place. [2024-06-27 19:19:42,646 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 233 selfloop transitions, 138 changer transitions 0/378 dead transitions. [2024-06-27 19:19:42,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 378 transitions, 4855 flow [2024-06-27 19:19:42,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 19:19:42,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 19:19:42,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 286 transitions. [2024-06-27 19:19:42,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-27 19:19:42,647 INFO L175 Difference]: Start difference. First operand has 294 places, 341 transitions, 3685 flow. Second operand 13 states and 286 transitions. [2024-06-27 19:19:42,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 378 transitions, 4855 flow [2024-06-27 19:19:43,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 378 transitions, 4727 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 19:19:43,426 INFO L231 Difference]: Finished difference. Result has 300 places, 347 transitions, 3901 flow [2024-06-27 19:19:43,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3557, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3901, PETRI_PLACES=300, PETRI_TRANSITIONS=347} [2024-06-27 19:19:43,426 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 259 predicate places. [2024-06-27 19:19:43,426 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 347 transitions, 3901 flow [2024-06-27 19:19:43,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:43,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:43,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:43,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 19:19:43,427 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)] === [2024-06-27 19:19:43,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:43,427 INFO L85 PathProgramCache]: Analyzing trace with hash -225579817, now seen corresponding path program 12 times [2024-06-27 19:19:43,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:43,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504455444] [2024-06-27 19:19:43,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:43,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:43,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:43,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:43,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:43,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504455444] [2024-06-27 19:19:43,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504455444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:43,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:43,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:19:43,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538530159] [2024-06-27 19:19:43,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:43,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:19:43,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:43,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:19:43,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:19:43,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:43,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 347 transitions, 3901 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:43,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:43,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:43,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:44,091 INFO L124 PetriNetUnfolderBase]: 1799/3044 cut-off events. [2024-06-27 19:19:44,091 INFO L125 PetriNetUnfolderBase]: For 165307/165319 co-relation queries the response was YES. [2024-06-27 19:19:44,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19300 conditions, 3044 events. 1799/3044 cut-off events. For 165307/165319 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 18326 event pairs, 380 based on Foata normal form. 13/3056 useless extension candidates. Maximal degree in co-relation 19163. Up to 2512 conditions per place. [2024-06-27 19:19:44,124 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 230 selfloop transitions, 140 changer transitions 0/377 dead transitions. [2024-06-27 19:19:44,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 377 transitions, 4861 flow [2024-06-27 19:19:44,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 19:19:44,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 19:19:44,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 283 transitions. [2024-06-27 19:19:44,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5442307692307692 [2024-06-27 19:19:44,125 INFO L175 Difference]: Start difference. First operand has 300 places, 347 transitions, 3901 flow. Second operand 13 states and 283 transitions. [2024-06-27 19:19:44,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 377 transitions, 4861 flow [2024-06-27 19:19:44,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 377 transitions, 4602 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-27 19:19:44,976 INFO L231 Difference]: Finished difference. Result has 304 places, 347 transitions, 3928 flow [2024-06-27 19:19:44,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3642, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3928, PETRI_PLACES=304, PETRI_TRANSITIONS=347} [2024-06-27 19:19:44,976 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 263 predicate places. [2024-06-27 19:19:44,976 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 347 transitions, 3928 flow [2024-06-27 19:19:44,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:44,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:44,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:44,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 19:19:44,976 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)] === [2024-06-27 19:19:44,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:44,977 INFO L85 PathProgramCache]: Analyzing trace with hash 2045214539, now seen corresponding path program 13 times [2024-06-27 19:19:44,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:44,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546174657] [2024-06-27 19:19:44,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:44,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:44,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:45,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:45,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:45,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546174657] [2024-06-27 19:19:45,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546174657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:45,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:45,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:19:45,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167359026] [2024-06-27 19:19:45,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:45,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:19:45,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:45,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:19:45,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:19:45,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:45,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 347 transitions, 3928 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:45,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:45,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:45,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:45,641 INFO L124 PetriNetUnfolderBase]: 1828/3096 cut-off events. [2024-06-27 19:19:45,641 INFO L125 PetriNetUnfolderBase]: For 172760/172772 co-relation queries the response was YES. [2024-06-27 19:19:45,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19736 conditions, 3096 events. 1828/3096 cut-off events. For 172760/172772 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 18701 event pairs, 380 based on Foata normal form. 13/3108 useless extension candidates. Maximal degree in co-relation 19598. Up to 2613 conditions per place. [2024-06-27 19:19:45,672 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 279 selfloop transitions, 103 changer transitions 0/389 dead transitions. [2024-06-27 19:19:45,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 389 transitions, 5231 flow [2024-06-27 19:19:45,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:19:45,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:19:45,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-27 19:19:45,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2024-06-27 19:19:45,673 INFO L175 Difference]: Start difference. First operand has 304 places, 347 transitions, 3928 flow. Second operand 9 states and 215 transitions. [2024-06-27 19:19:45,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 389 transitions, 5231 flow [2024-06-27 19:19:46,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 389 transitions, 4925 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-27 19:19:46,573 INFO L231 Difference]: Finished difference. Result has 302 places, 358 transitions, 4025 flow [2024-06-27 19:19:46,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3644, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4025, PETRI_PLACES=302, PETRI_TRANSITIONS=358} [2024-06-27 19:19:46,574 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 261 predicate places. [2024-06-27 19:19:46,574 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 358 transitions, 4025 flow [2024-06-27 19:19:46,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:46,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:46,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:46,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 19:19:46,574 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)] === [2024-06-27 19:19:46,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:46,574 INFO L85 PathProgramCache]: Analyzing trace with hash 2045220119, now seen corresponding path program 14 times [2024-06-27 19:19:46,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:46,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065750637] [2024-06-27 19:19:46,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:46,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:46,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:46,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:46,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065750637] [2024-06-27 19:19:46,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065750637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:46,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:46,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:19:46,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52708137] [2024-06-27 19:19:46,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:46,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:19:46,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:46,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:19:46,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:19:46,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:46,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 358 transitions, 4025 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:46,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:46,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:46,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:47,230 INFO L124 PetriNetUnfolderBase]: 1841/3118 cut-off events. [2024-06-27 19:19:47,230 INFO L125 PetriNetUnfolderBase]: For 179939/179951 co-relation queries the response was YES. [2024-06-27 19:19:47,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19948 conditions, 3118 events. 1841/3118 cut-off events. For 179939/179951 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 18870 event pairs, 380 based on Foata normal form. 13/3130 useless extension candidates. Maximal degree in co-relation 19808. Up to 2628 conditions per place. [2024-06-27 19:19:47,262 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 272 selfloop transitions, 114 changer transitions 0/393 dead transitions. [2024-06-27 19:19:47,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 393 transitions, 5264 flow [2024-06-27 19:19:47,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:19:47,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:19:47,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-27 19:19:47,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5725 [2024-06-27 19:19:47,263 INFO L175 Difference]: Start difference. First operand has 302 places, 358 transitions, 4025 flow. Second operand 10 states and 229 transitions. [2024-06-27 19:19:47,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 393 transitions, 5264 flow [2024-06-27 19:19:48,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 393 transitions, 5039 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 19:19:48,152 INFO L231 Difference]: Finished difference. Result has 306 places, 365 transitions, 4168 flow [2024-06-27 19:19:48,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3813, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4168, PETRI_PLACES=306, PETRI_TRANSITIONS=365} [2024-06-27 19:19:48,152 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 265 predicate places. [2024-06-27 19:19:48,152 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 365 transitions, 4168 flow [2024-06-27 19:19:48,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:48,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:48,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:48,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 19:19:48,152 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)] === [2024-06-27 19:19:48,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:48,153 INFO L85 PathProgramCache]: Analyzing trace with hash 2045398679, now seen corresponding path program 15 times [2024-06-27 19:19:48,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:48,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343899363] [2024-06-27 19:19:48,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:48,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:48,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:48,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:48,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:48,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343899363] [2024-06-27 19:19:48,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343899363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:48,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:48,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:19:48,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378188491] [2024-06-27 19:19:48,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:48,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:19:48,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:48,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:19:48,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:19:48,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:48,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 365 transitions, 4168 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:48,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:48,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:48,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:48,814 INFO L124 PetriNetUnfolderBase]: 1846/3127 cut-off events. [2024-06-27 19:19:48,814 INFO L125 PetriNetUnfolderBase]: For 180056/180068 co-relation queries the response was YES. [2024-06-27 19:19:48,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20082 conditions, 3127 events. 1846/3127 cut-off events. For 180056/180068 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 18942 event pairs, 380 based on Foata normal form. 13/3139 useless extension candidates. Maximal degree in co-relation 19941. Up to 2634 conditions per place. [2024-06-27 19:19:48,847 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 272 selfloop transitions, 112 changer transitions 0/391 dead transitions. [2024-06-27 19:19:48,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 391 transitions, 5345 flow [2024-06-27 19:19:48,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:19:48,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:19:48,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-27 19:19:48,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-27 19:19:48,848 INFO L175 Difference]: Start difference. First operand has 306 places, 365 transitions, 4168 flow. Second operand 8 states and 190 transitions. [2024-06-27 19:19:48,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 391 transitions, 5345 flow [2024-06-27 19:19:49,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 391 transitions, 5131 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 19:19:49,900 INFO L231 Difference]: Finished difference. Result has 307 places, 368 transitions, 4237 flow [2024-06-27 19:19:49,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3961, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4237, PETRI_PLACES=307, PETRI_TRANSITIONS=368} [2024-06-27 19:19:49,900 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 266 predicate places. [2024-06-27 19:19:49,900 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 368 transitions, 4237 flow [2024-06-27 19:19:49,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:49,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:49,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:49,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 19:19:49,901 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)] === [2024-06-27 19:19:49,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:49,901 INFO L85 PathProgramCache]: Analyzing trace with hash 2045571659, now seen corresponding path program 16 times [2024-06-27 19:19:49,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:49,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466327033] [2024-06-27 19:19:49,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:49,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:49,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:50,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:50,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466327033] [2024-06-27 19:19:50,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466327033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:50,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:50,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:19:50,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733913779] [2024-06-27 19:19:50,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:50,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:19:50,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:50,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:19:50,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:19:50,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:50,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 368 transitions, 4237 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:50,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:50,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:50,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:50,561 INFO L124 PetriNetUnfolderBase]: 1843/3123 cut-off events. [2024-06-27 19:19:50,561 INFO L125 PetriNetUnfolderBase]: For 177398/177410 co-relation queries the response was YES. [2024-06-27 19:19:50,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19972 conditions, 3123 events. 1843/3123 cut-off events. For 177398/177410 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 18916 event pairs, 380 based on Foata normal form. 13/3135 useless extension candidates. Maximal degree in co-relation 19831. Up to 2631 conditions per place. [2024-06-27 19:19:50,592 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 270 selfloop transitions, 116 changer transitions 0/393 dead transitions. [2024-06-27 19:19:50,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 393 transitions, 5373 flow [2024-06-27 19:19:50,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:19:50,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:19:50,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-27 19:19:50,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5675 [2024-06-27 19:19:50,593 INFO L175 Difference]: Start difference. First operand has 307 places, 368 transitions, 4237 flow. Second operand 10 states and 227 transitions. [2024-06-27 19:19:50,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 393 transitions, 5373 flow [2024-06-27 19:19:51,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 393 transitions, 5190 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 19:19:51,547 INFO L231 Difference]: Finished difference. Result has 312 places, 368 transitions, 4292 flow [2024-06-27 19:19:51,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4054, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4292, PETRI_PLACES=312, PETRI_TRANSITIONS=368} [2024-06-27 19:19:51,548 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 271 predicate places. [2024-06-27 19:19:51,548 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 368 transitions, 4292 flow [2024-06-27 19:19:51,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:51,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:51,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:51,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 19:19:51,548 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)] === [2024-06-27 19:19:51,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:51,548 INFO L85 PathProgramCache]: Analyzing trace with hash 2045566079, now seen corresponding path program 17 times [2024-06-27 19:19:51,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:51,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19696474] [2024-06-27 19:19:51,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:51,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:51,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:51,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:51,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19696474] [2024-06-27 19:19:51,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19696474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:51,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:51,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:19:51,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895169706] [2024-06-27 19:19:51,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:51,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:19:51,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:51,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:19:51,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:19:51,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:51,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 368 transitions, 4292 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:51,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:51,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:51,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:52,258 INFO L124 PetriNetUnfolderBase]: 1840/3119 cut-off events. [2024-06-27 19:19:52,258 INFO L125 PetriNetUnfolderBase]: For 178947/178959 co-relation queries the response was YES. [2024-06-27 19:19:52,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19959 conditions, 3119 events. 1840/3119 cut-off events. For 178947/178959 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 18878 event pairs, 380 based on Foata normal form. 13/3131 useless extension candidates. Maximal degree in co-relation 19817. Up to 2628 conditions per place. [2024-06-27 19:19:52,291 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 269 selfloop transitions, 117 changer transitions 0/393 dead transitions. [2024-06-27 19:19:52,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 393 transitions, 5278 flow [2024-06-27 19:19:52,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:19:52,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:19:52,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 243 transitions. [2024-06-27 19:19:52,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5522727272727272 [2024-06-27 19:19:52,293 INFO L175 Difference]: Start difference. First operand has 312 places, 368 transitions, 4292 flow. Second operand 11 states and 243 transitions. [2024-06-27 19:19:52,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 393 transitions, 5278 flow [2024-06-27 19:19:53,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 393 transitions, 5016 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 19:19:53,327 INFO L231 Difference]: Finished difference. Result has 316 places, 368 transitions, 4270 flow [2024-06-27 19:19:53,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4030, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4270, PETRI_PLACES=316, PETRI_TRANSITIONS=368} [2024-06-27 19:19:53,327 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 275 predicate places. [2024-06-27 19:19:53,327 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 368 transitions, 4270 flow [2024-06-27 19:19:53,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:53,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:53,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:53,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 19:19:53,328 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)] === [2024-06-27 19:19:53,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:53,328 INFO L85 PathProgramCache]: Analyzing trace with hash 2045387519, now seen corresponding path program 18 times [2024-06-27 19:19:53,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:53,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857619256] [2024-06-27 19:19:53,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:53,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:53,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:53,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:53,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:53,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857619256] [2024-06-27 19:19:53,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857619256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:53,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:53,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:19:53,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853387563] [2024-06-27 19:19:53,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:53,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:19:53,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:53,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:19:53,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:19:53,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:53,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 368 transitions, 4270 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:53,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:53,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:53,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:54,073 INFO L124 PetriNetUnfolderBase]: 1837/3115 cut-off events. [2024-06-27 19:19:54,073 INFO L125 PetriNetUnfolderBase]: For 179929/179941 co-relation queries the response was YES. [2024-06-27 19:19:54,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19889 conditions, 3115 events. 1837/3115 cut-off events. For 179929/179941 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 18848 event pairs, 380 based on Foata normal form. 13/3127 useless extension candidates. Maximal degree in co-relation 19746. Up to 2625 conditions per place. [2024-06-27 19:19:54,109 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 274 selfloop transitions, 111 changer transitions 0/392 dead transitions. [2024-06-27 19:19:54,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 392 transitions, 5100 flow [2024-06-27 19:19:54,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:19:54,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:19:54,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:19:54,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-27 19:19:54,110 INFO L175 Difference]: Start difference. First operand has 316 places, 368 transitions, 4270 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:19:54,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 392 transitions, 5100 flow [2024-06-27 19:19:55,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 392 transitions, 4810 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-27 19:19:55,118 INFO L231 Difference]: Finished difference. Result has 313 places, 368 transitions, 4208 flow [2024-06-27 19:19:55,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3980, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4208, PETRI_PLACES=313, PETRI_TRANSITIONS=368} [2024-06-27 19:19:55,119 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 272 predicate places. [2024-06-27 19:19:55,119 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 368 transitions, 4208 flow [2024-06-27 19:19:55,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:55,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:55,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:55,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 19:19:55,119 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)] === [2024-06-27 19:19:55,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:55,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1475184831, now seen corresponding path program 19 times [2024-06-27 19:19:55,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:55,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292006180] [2024-06-27 19:19:55,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:55,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:55,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:55,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:55,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292006180] [2024-06-27 19:19:55,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292006180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:55,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:55,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:19:55,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997364948] [2024-06-27 19:19:55,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:55,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:19:55,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:55,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:19:55,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:19:55,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:55,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 368 transitions, 4208 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:55,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:55,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:55,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:55,777 INFO L124 PetriNetUnfolderBase]: 1842/3121 cut-off events. [2024-06-27 19:19:55,777 INFO L125 PetriNetUnfolderBase]: For 184087/184095 co-relation queries the response was YES. [2024-06-27 19:19:55,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19942 conditions, 3121 events. 1842/3121 cut-off events. For 184087/184095 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 18924 event pairs, 402 based on Foata normal form. 6/3125 useless extension candidates. Maximal degree in co-relation 19798. Up to 2552 conditions per place. [2024-06-27 19:19:55,809 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 212 selfloop transitions, 170 changer transitions 0/389 dead transitions. [2024-06-27 19:19:55,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 389 transitions, 5206 flow [2024-06-27 19:19:55,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:19:55,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:19:55,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-27 19:19:55,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.545 [2024-06-27 19:19:55,810 INFO L175 Difference]: Start difference. First operand has 313 places, 368 transitions, 4208 flow. Second operand 10 states and 218 transitions. [2024-06-27 19:19:55,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 389 transitions, 5206 flow [2024-06-27 19:19:56,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 389 transitions, 4942 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 19:19:56,925 INFO L231 Difference]: Finished difference. Result has 315 places, 371 transitions, 4324 flow [2024-06-27 19:19:56,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3944, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4324, PETRI_PLACES=315, PETRI_TRANSITIONS=371} [2024-06-27 19:19:56,926 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 274 predicate places. [2024-06-27 19:19:56,926 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 371 transitions, 4324 flow [2024-06-27 19:19:56,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:56,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:56,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:56,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 19:19:56,927 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)] === [2024-06-27 19:19:56,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:56,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1135365621, now seen corresponding path program 20 times [2024-06-27 19:19:56,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:56,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744168150] [2024-06-27 19:19:56,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:56,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:56,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:57,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:57,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:57,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744168150] [2024-06-27 19:19:57,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744168150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:57,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:57,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:19:57,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360741052] [2024-06-27 19:19:57,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:57,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:19:57,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:57,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:19:57,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:19:57,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:57,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 371 transitions, 4324 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:57,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:57,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:57,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:57,726 INFO L124 PetriNetUnfolderBase]: 1855/3146 cut-off events. [2024-06-27 19:19:57,726 INFO L125 PetriNetUnfolderBase]: For 191323/191335 co-relation queries the response was YES. [2024-06-27 19:19:57,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20302 conditions, 3146 events. 1855/3146 cut-off events. For 191323/191335 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 19093 event pairs, 380 based on Foata normal form. 13/3158 useless extension candidates. Maximal degree in co-relation 20157. Up to 2567 conditions per place. [2024-06-27 19:19:57,755 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 226 selfloop transitions, 182 changer transitions 0/415 dead transitions. [2024-06-27 19:19:57,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 415 transitions, 5632 flow [2024-06-27 19:19:57,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 19:19:57,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 19:19:57,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 309 transitions. [2024-06-27 19:19:57,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5517857142857143 [2024-06-27 19:19:57,756 INFO L175 Difference]: Start difference. First operand has 315 places, 371 transitions, 4324 flow. Second operand 14 states and 309 transitions. [2024-06-27 19:19:57,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 415 transitions, 5632 flow [2024-06-27 19:19:58,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 415 transitions, 5330 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 19:19:58,975 INFO L231 Difference]: Finished difference. Result has 322 places, 377 transitions, 4480 flow [2024-06-27 19:19:58,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4028, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4480, PETRI_PLACES=322, PETRI_TRANSITIONS=377} [2024-06-27 19:19:58,975 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 281 predicate places. [2024-06-27 19:19:58,975 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 377 transitions, 4480 flow [2024-06-27 19:19:58,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:58,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:58,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:58,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 19:19:58,976 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)] === [2024-06-27 19:19:58,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:58,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1142717271, now seen corresponding path program 21 times [2024-06-27 19:19:58,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:58,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414791391] [2024-06-27 19:19:58,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:58,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:59,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:59,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:59,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414791391] [2024-06-27 19:19:59,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414791391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:59,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:59,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:19:59,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037752740] [2024-06-27 19:19:59,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:59,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:19:59,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:59,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:19:59,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:19:59,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:59,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 377 transitions, 4480 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:59,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:59,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:59,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:59,689 INFO L124 PetriNetUnfolderBase]: 1852/3142 cut-off events. [2024-06-27 19:19:59,689 INFO L125 PetriNetUnfolderBase]: For 192629/192641 co-relation queries the response was YES. [2024-06-27 19:19:59,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20310 conditions, 3142 events. 1852/3142 cut-off events. For 192629/192641 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 19097 event pairs, 380 based on Foata normal form. 13/3154 useless extension candidates. Maximal degree in co-relation 20164. Up to 2564 conditions per place. [2024-06-27 19:19:59,722 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 218 selfloop transitions, 181 changer transitions 0/406 dead transitions. [2024-06-27 19:19:59,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 406 transitions, 5510 flow [2024-06-27 19:19:59,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:19:59,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:19:59,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 264 transitions. [2024-06-27 19:19:59,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-27 19:19:59,723 INFO L175 Difference]: Start difference. First operand has 322 places, 377 transitions, 4480 flow. Second operand 12 states and 264 transitions. [2024-06-27 19:19:59,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 406 transitions, 5510 flow [2024-06-27 19:20:00,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 406 transitions, 5150 flow, removed 20 selfloop flow, removed 12 redundant places. [2024-06-27 19:20:00,857 INFO L231 Difference]: Finished difference. Result has 322 places, 377 transitions, 4496 flow [2024-06-27 19:20:00,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4124, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4496, PETRI_PLACES=322, PETRI_TRANSITIONS=377} [2024-06-27 19:20:00,857 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 281 predicate places. [2024-06-27 19:20:00,858 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 377 transitions, 4496 flow [2024-06-27 19:20:00,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:00,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:00,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:00,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 19:20:00,858 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)] === [2024-06-27 19:20:00,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:00,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1135360041, now seen corresponding path program 22 times [2024-06-27 19:20:00,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:00,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804894196] [2024-06-27 19:20:00,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:00,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:00,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:00,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:00,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:00,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804894196] [2024-06-27 19:20:00,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804894196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:00,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:00,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:20:00,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981255560] [2024-06-27 19:20:00,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:00,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:20:00,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:00,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:20:00,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:20:01,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:01,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 377 transitions, 4496 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:01,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:01,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:01,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:01,562 INFO L124 PetriNetUnfolderBase]: 1849/3138 cut-off events. [2024-06-27 19:20:01,562 INFO L125 PetriNetUnfolderBase]: For 185259/185271 co-relation queries the response was YES. [2024-06-27 19:20:01,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20143 conditions, 3138 events. 1849/3138 cut-off events. For 185259/185271 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 19045 event pairs, 380 based on Foata normal form. 13/3150 useless extension candidates. Maximal degree in co-relation 19998. Up to 2561 conditions per place. [2024-06-27 19:20:01,596 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 222 selfloop transitions, 182 changer transitions 0/411 dead transitions. [2024-06-27 19:20:01,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 411 transitions, 5388 flow [2024-06-27 19:20:01,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:20:01,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:20:01,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 271 transitions. [2024-06-27 19:20:01,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5645833333333333 [2024-06-27 19:20:01,597 INFO L175 Difference]: Start difference. First operand has 322 places, 377 transitions, 4496 flow. Second operand 12 states and 271 transitions. [2024-06-27 19:20:01,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 411 transitions, 5388 flow [2024-06-27 19:20:02,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 411 transitions, 4880 flow, removed 9 selfloop flow, removed 14 redundant places. [2024-06-27 19:20:02,647 INFO L231 Difference]: Finished difference. Result has 320 places, 377 transitions, 4366 flow [2024-06-27 19:20:02,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3988, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4366, PETRI_PLACES=320, PETRI_TRANSITIONS=377} [2024-06-27 19:20:02,648 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 279 predicate places. [2024-06-27 19:20:02,648 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 377 transitions, 4366 flow [2024-06-27 19:20:02,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:02,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:02,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:02,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 19:20:02,648 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)] === [2024-06-27 19:20:02,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:02,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1420374067, now seen corresponding path program 23 times [2024-06-27 19:20:02,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:02,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806861346] [2024-06-27 19:20:02,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:02,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:02,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:02,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:02,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:02,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806861346] [2024-06-27 19:20:02,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806861346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:02,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:02,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:20:02,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500326620] [2024-06-27 19:20:02,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:02,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:20:02,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:02,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:20:02,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:20:02,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:02,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 377 transitions, 4366 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:02,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:02,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:02,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:03,333 INFO L124 PetriNetUnfolderBase]: 1862/3160 cut-off events. [2024-06-27 19:20:03,333 INFO L125 PetriNetUnfolderBase]: For 188453/188465 co-relation queries the response was YES. [2024-06-27 19:20:03,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20324 conditions, 3160 events. 1862/3160 cut-off events. For 188453/188465 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 19203 event pairs, 386 based on Foata normal form. 13/3172 useless extension candidates. Maximal degree in co-relation 20179. Up to 2549 conditions per place. [2024-06-27 19:20:03,371 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 227 selfloop transitions, 178 changer transitions 0/412 dead transitions. [2024-06-27 19:20:03,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 412 transitions, 5518 flow [2024-06-27 19:20:03,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:20:03,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:20:03,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 264 transitions. [2024-06-27 19:20:03,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-27 19:20:03,372 INFO L175 Difference]: Start difference. First operand has 320 places, 377 transitions, 4366 flow. Second operand 12 states and 264 transitions. [2024-06-27 19:20:03,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 412 transitions, 5518 flow [2024-06-27 19:20:04,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 412 transitions, 5138 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-27 19:20:04,452 INFO L231 Difference]: Finished difference. Result has 319 places, 383 transitions, 4470 flow [2024-06-27 19:20:04,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3990, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4470, PETRI_PLACES=319, PETRI_TRANSITIONS=383} [2024-06-27 19:20:04,453 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 278 predicate places. [2024-06-27 19:20:04,453 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 383 transitions, 4470 flow [2024-06-27 19:20:04,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:04,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:04,453 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] [2024-06-27 19:20:04,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 19:20:04,453 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)] === [2024-06-27 19:20:04,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:04,453 INFO L85 PathProgramCache]: Analyzing trace with hash -973830741, now seen corresponding path program 24 times [2024-06-27 19:20:04,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:04,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436383332] [2024-06-27 19:20:04,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:04,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:04,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:04,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:04,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:04,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436383332] [2024-06-27 19:20:04,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436383332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:04,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:04,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:20:04,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555505186] [2024-06-27 19:20:04,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:04,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:20:04,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:04,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:20:04,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:20:04,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:04,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 383 transitions, 4470 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:04,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:04,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:04,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:05,152 INFO L124 PetriNetUnfolderBase]: 1867/3169 cut-off events. [2024-06-27 19:20:05,152 INFO L125 PetriNetUnfolderBase]: For 186773/186785 co-relation queries the response was YES. [2024-06-27 19:20:05,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20620 conditions, 3169 events. 1867/3169 cut-off events. For 186773/186785 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 19298 event pairs, 380 based on Foata normal form. 13/3181 useless extension candidates. Maximal degree in co-relation 20476. Up to 2703 conditions per place. [2024-06-27 19:20:05,187 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 332 selfloop transitions, 72 changer transitions 0/411 dead transitions. [2024-06-27 19:20:05,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 411 transitions, 5544 flow [2024-06-27 19:20:05,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:20:05,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:20:05,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-27 19:20:05,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.590625 [2024-06-27 19:20:05,188 INFO L175 Difference]: Start difference. First operand has 319 places, 383 transitions, 4470 flow. Second operand 8 states and 189 transitions. [2024-06-27 19:20:05,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 411 transitions, 5544 flow [2024-06-27 19:20:06,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 411 transitions, 5317 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-27 19:20:06,336 INFO L231 Difference]: Finished difference. Result has 319 places, 386 transitions, 4439 flow [2024-06-27 19:20:06,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4243, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4439, PETRI_PLACES=319, PETRI_TRANSITIONS=386} [2024-06-27 19:20:06,336 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 278 predicate places. [2024-06-27 19:20:06,336 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 386 transitions, 4439 flow [2024-06-27 19:20:06,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:06,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:06,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:06,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 19:20:06,337 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)] === [2024-06-27 19:20:06,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:06,337 INFO L85 PathProgramCache]: Analyzing trace with hash 110840191, now seen corresponding path program 25 times [2024-06-27 19:20:06,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:06,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605339518] [2024-06-27 19:20:06,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:06,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:06,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:06,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:06,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:06,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605339518] [2024-06-27 19:20:06,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605339518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:06,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:06,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:20:06,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309872291] [2024-06-27 19:20:06,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:06,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:20:06,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:06,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:20:06,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:20:06,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:06,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 386 transitions, 4439 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:06,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:06,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:06,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:07,115 INFO L124 PetriNetUnfolderBase]: 1864/3165 cut-off events. [2024-06-27 19:20:07,115 INFO L125 PetriNetUnfolderBase]: For 187348/187360 co-relation queries the response was YES. [2024-06-27 19:20:07,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20627 conditions, 3165 events. 1864/3165 cut-off events. For 187348/187360 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 19251 event pairs, 380 based on Foata normal form. 13/3177 useless extension candidates. Maximal degree in co-relation 20481. Up to 2700 conditions per place. [2024-06-27 19:20:07,150 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 334 selfloop transitions, 74 changer transitions 0/415 dead transitions. [2024-06-27 19:20:07,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 415 transitions, 5327 flow [2024-06-27 19:20:07,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:20:07,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:20:07,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-27 19:20:07,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565 [2024-06-27 19:20:07,151 INFO L175 Difference]: Start difference. First operand has 319 places, 386 transitions, 4439 flow. Second operand 10 states and 226 transitions. [2024-06-27 19:20:07,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 415 transitions, 5327 flow [2024-06-27 19:20:08,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 415 transitions, 5100 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 19:20:08,350 INFO L231 Difference]: Finished difference. Result has 323 places, 386 transitions, 4366 flow [2024-06-27 19:20:08,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4212, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4366, PETRI_PLACES=323, PETRI_TRANSITIONS=386} [2024-06-27 19:20:08,351 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 282 predicate places. [2024-06-27 19:20:08,351 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 386 transitions, 4366 flow [2024-06-27 19:20:08,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:08,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:08,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:08,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 19:20:08,351 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)] === [2024-06-27 19:20:08,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:08,351 INFO L85 PathProgramCache]: Analyzing trace with hash 123738361, now seen corresponding path program 26 times [2024-06-27 19:20:08,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:08,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804842827] [2024-06-27 19:20:08,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:08,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:08,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:08,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:08,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:08,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804842827] [2024-06-27 19:20:08,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804842827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:08,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:08,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:20:08,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102438943] [2024-06-27 19:20:08,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:08,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:20:08,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:08,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:20:08,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:20:08,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:08,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 386 transitions, 4366 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:08,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:08,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:08,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:09,021 INFO L124 PetriNetUnfolderBase]: 1869/3174 cut-off events. [2024-06-27 19:20:09,022 INFO L125 PetriNetUnfolderBase]: For 191313/191325 co-relation queries the response was YES. [2024-06-27 19:20:09,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20600 conditions, 3174 events. 1869/3174 cut-off events. For 191313/191325 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 19327 event pairs, 386 based on Foata normal form. 13/3186 useless extension candidates. Maximal degree in co-relation 20455. Up to 2603 conditions per place. [2024-06-27 19:20:09,055 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 259 selfloop transitions, 145 changer transitions 0/411 dead transitions. [2024-06-27 19:20:09,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 411 transitions, 5432 flow [2024-06-27 19:20:09,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:20:09,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:20:09,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-27 19:20:09,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-27 19:20:09,055 INFO L175 Difference]: Start difference. First operand has 323 places, 386 transitions, 4366 flow. Second operand 8 states and 188 transitions. [2024-06-27 19:20:09,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 411 transitions, 5432 flow [2024-06-27 19:20:10,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 411 transitions, 5101 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-27 19:20:10,084 INFO L231 Difference]: Finished difference. Result has 319 places, 389 transitions, 4373 flow [2024-06-27 19:20:10,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4035, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4373, PETRI_PLACES=319, PETRI_TRANSITIONS=389} [2024-06-27 19:20:10,084 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 278 predicate places. [2024-06-27 19:20:10,084 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 389 transitions, 4373 flow [2024-06-27 19:20:10,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:10,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:10,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:10,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 19:20:10,085 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)] === [2024-06-27 19:20:10,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:10,085 INFO L85 PathProgramCache]: Analyzing trace with hash 289972141, now seen corresponding path program 27 times [2024-06-27 19:20:10,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:10,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836110680] [2024-06-27 19:20:10,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:10,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:10,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:10,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:10,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836110680] [2024-06-27 19:20:10,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836110680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:10,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:10,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:20:10,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618832986] [2024-06-27 19:20:10,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:10,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:20:10,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:10,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:20:10,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:20:10,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:10,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 389 transitions, 4373 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:10,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:10,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:10,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:10,746 INFO L124 PetriNetUnfolderBase]: 1874/3183 cut-off events. [2024-06-27 19:20:10,746 INFO L125 PetriNetUnfolderBase]: For 195373/195385 co-relation queries the response was YES. [2024-06-27 19:20:10,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20759 conditions, 3183 events. 1874/3183 cut-off events. For 195373/195385 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 19432 event pairs, 380 based on Foata normal form. 13/3195 useless extension candidates. Maximal degree in co-relation 20613. Up to 2609 conditions per place. [2024-06-27 19:20:10,780 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 254 selfloop transitions, 156 changer transitions 0/417 dead transitions. [2024-06-27 19:20:10,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 417 transitions, 5465 flow [2024-06-27 19:20:10,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:20:10,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:20:10,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 244 transitions. [2024-06-27 19:20:10,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5545454545454546 [2024-06-27 19:20:10,781 INFO L175 Difference]: Start difference. First operand has 319 places, 389 transitions, 4373 flow. Second operand 11 states and 244 transitions. [2024-06-27 19:20:10,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 417 transitions, 5465 flow [2024-06-27 19:20:11,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 417 transitions, 5216 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 19:20:11,631 INFO L231 Difference]: Finished difference. Result has 325 places, 392 transitions, 4490 flow [2024-06-27 19:20:11,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4127, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4490, PETRI_PLACES=325, PETRI_TRANSITIONS=392} [2024-06-27 19:20:11,632 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 284 predicate places. [2024-06-27 19:20:11,632 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 392 transitions, 4490 flow [2024-06-27 19:20:11,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:11,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:11,632 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] [2024-06-27 19:20:11,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 19:20:11,632 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)] === [2024-06-27 19:20:11,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:11,632 INFO L85 PathProgramCache]: Analyzing trace with hash 282620491, now seen corresponding path program 28 times [2024-06-27 19:20:11,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:11,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436222957] [2024-06-27 19:20:11,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:11,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:11,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:11,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:11,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:11,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436222957] [2024-06-27 19:20:11,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436222957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:11,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:11,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:20:11,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203743286] [2024-06-27 19:20:11,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:11,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:20:11,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:11,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:20:11,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:20:11,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:11,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 392 transitions, 4490 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:11,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:11,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:11,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:12,354 INFO L124 PetriNetUnfolderBase]: 1879/3192 cut-off events. [2024-06-27 19:20:12,354 INFO L125 PetriNetUnfolderBase]: For 200284/200296 co-relation queries the response was YES. [2024-06-27 19:20:12,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20901 conditions, 3192 events. 1879/3192 cut-off events. For 200284/200296 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 19507 event pairs, 380 based on Foata normal form. 13/3204 useless extension candidates. Maximal degree in co-relation 20754. Up to 2615 conditions per place. [2024-06-27 19:20:12,386 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 253 selfloop transitions, 162 changer transitions 0/422 dead transitions. [2024-06-27 19:20:12,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 422 transitions, 5601 flow [2024-06-27 19:20:12,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 19:20:12,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 19:20:12,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 282 transitions. [2024-06-27 19:20:12,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5423076923076923 [2024-06-27 19:20:12,387 INFO L175 Difference]: Start difference. First operand has 325 places, 392 transitions, 4490 flow. Second operand 13 states and 282 transitions. [2024-06-27 19:20:12,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 422 transitions, 5601 flow [2024-06-27 19:20:13,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 422 transitions, 5197 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-27 19:20:13,676 INFO L231 Difference]: Finished difference. Result has 329 places, 395 transitions, 4467 flow [2024-06-27 19:20:13,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4100, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4467, PETRI_PLACES=329, PETRI_TRANSITIONS=395} [2024-06-27 19:20:13,677 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 288 predicate places. [2024-06-27 19:20:13,677 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 395 transitions, 4467 flow [2024-06-27 19:20:13,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:13,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:13,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:13,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 19:20:13,677 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)] === [2024-06-27 19:20:13,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:13,677 INFO L85 PathProgramCache]: Analyzing trace with hash 282614911, now seen corresponding path program 29 times [2024-06-27 19:20:13,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:13,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081951425] [2024-06-27 19:20:13,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:13,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:13,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:13,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:13,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081951425] [2024-06-27 19:20:13,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081951425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:13,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:13,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:20:13,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189641759] [2024-06-27 19:20:13,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:13,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:20:13,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:13,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:20:13,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:20:13,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:13,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 395 transitions, 4467 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:13,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:13,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:13,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:14,358 INFO L124 PetriNetUnfolderBase]: 1876/3188 cut-off events. [2024-06-27 19:20:14,358 INFO L125 PetriNetUnfolderBase]: For 200338/200350 co-relation queries the response was YES. [2024-06-27 19:20:14,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20786 conditions, 3188 events. 1876/3188 cut-off events. For 200338/200350 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 19504 event pairs, 380 based on Foata normal form. 13/3200 useless extension candidates. Maximal degree in co-relation 20638. Up to 2612 conditions per place. [2024-06-27 19:20:14,392 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 250 selfloop transitions, 164 changer transitions 0/421 dead transitions. [2024-06-27 19:20:14,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 421 transitions, 5357 flow [2024-06-27 19:20:14,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 19:20:14,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 19:20:14,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 279 transitions. [2024-06-27 19:20:14,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365384615384615 [2024-06-27 19:20:14,393 INFO L175 Difference]: Start difference. First operand has 329 places, 395 transitions, 4467 flow. Second operand 13 states and 279 transitions. [2024-06-27 19:20:14,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 421 transitions, 5357 flow [2024-06-27 19:20:15,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 421 transitions, 4969 flow, removed 22 selfloop flow, removed 11 redundant places. [2024-06-27 19:20:15,486 INFO L231 Difference]: Finished difference. Result has 331 places, 395 transitions, 4413 flow [2024-06-27 19:20:15,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4079, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4413, PETRI_PLACES=331, PETRI_TRANSITIONS=395} [2024-06-27 19:20:15,486 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 290 predicate places. [2024-06-27 19:20:15,486 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 395 transitions, 4413 flow [2024-06-27 19:20:15,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:15,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:15,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:15,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 19:20:15,487 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)] === [2024-06-27 19:20:15,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:15,487 INFO L85 PathProgramCache]: Analyzing trace with hash -18720449, now seen corresponding path program 30 times [2024-06-27 19:20:15,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:15,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048320016] [2024-06-27 19:20:15,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:15,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:15,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:15,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:15,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048320016] [2024-06-27 19:20:15,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048320016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:15,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:15,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:20:15,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457597057] [2024-06-27 19:20:15,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:15,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:20:15,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:15,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:20:15,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:20:15,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:15,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 395 transitions, 4413 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:15,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:15,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:15,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:16,132 INFO L124 PetriNetUnfolderBase]: 1873/3181 cut-off events. [2024-06-27 19:20:16,132 INFO L125 PetriNetUnfolderBase]: For 200954/200962 co-relation queries the response was YES. [2024-06-27 19:20:16,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20672 conditions, 3181 events. 1873/3181 cut-off events. For 200954/200962 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 19415 event pairs, 402 based on Foata normal form. 6/3185 useless extension candidates. Maximal degree in co-relation 20523. Up to 2521 conditions per place. [2024-06-27 19:20:16,165 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 184 selfloop transitions, 226 changer transitions 0/417 dead transitions. [2024-06-27 19:20:16,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 417 transitions, 5339 flow [2024-06-27 19:20:16,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:20:16,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:20:16,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 254 transitions. [2024-06-27 19:20:16,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-06-27 19:20:16,166 INFO L175 Difference]: Start difference. First operand has 331 places, 395 transitions, 4413 flow. Second operand 12 states and 254 transitions. [2024-06-27 19:20:16,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 417 transitions, 5339 flow [2024-06-27 19:20:17,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 417 transitions, 4931 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-06-27 19:20:17,281 INFO L231 Difference]: Finished difference. Result has 330 places, 398 transitions, 4531 flow [2024-06-27 19:20:17,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4005, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4531, PETRI_PLACES=330, PETRI_TRANSITIONS=398} [2024-06-27 19:20:17,281 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 289 predicate places. [2024-06-27 19:20:17,281 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 398 transitions, 4531 flow [2024-06-27 19:20:17,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:17,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:17,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:17,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 19:20:17,282 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)] === [2024-06-27 19:20:17,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:17,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1473257326, now seen corresponding path program 1 times [2024-06-27 19:20:17,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:17,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221625839] [2024-06-27 19:20:17,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:17,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:17,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:17,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221625839] [2024-06-27 19:20:17,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221625839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:17,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:17,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:20:17,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67361819] [2024-06-27 19:20:17,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:17,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:20:17,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:17,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:20:17,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:20:17,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:17,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 398 transitions, 4531 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:17,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:17,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:17,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:17,985 INFO L124 PetriNetUnfolderBase]: 1959/3315 cut-off events. [2024-06-27 19:20:17,985 INFO L125 PetriNetUnfolderBase]: For 272580/272588 co-relation queries the response was YES. [2024-06-27 19:20:18,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22952 conditions, 3315 events. 1959/3315 cut-off events. For 272580/272588 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 20224 event pairs, 314 based on Foata normal form. 14/3321 useless extension candidates. Maximal degree in co-relation 22802. Up to 1909 conditions per place. [2024-06-27 19:20:18,022 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 333 selfloop transitions, 101 changer transitions 0/441 dead transitions. [2024-06-27 19:20:18,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 441 transitions, 5967 flow [2024-06-27 19:20:18,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:20:18,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:20:18,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:20:18,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-27 19:20:18,023 INFO L175 Difference]: Start difference. First operand has 330 places, 398 transitions, 4531 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:20:18,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 441 transitions, 5967 flow [2024-06-27 19:20:19,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 441 transitions, 5463 flow, removed 28 selfloop flow, removed 10 redundant places. [2024-06-27 19:20:19,539 INFO L231 Difference]: Finished difference. Result has 328 places, 401 transitions, 4289 flow [2024-06-27 19:20:19,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4027, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4289, PETRI_PLACES=328, PETRI_TRANSITIONS=401} [2024-06-27 19:20:19,540 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 287 predicate places. [2024-06-27 19:20:19,540 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 401 transitions, 4289 flow [2024-06-27 19:20:19,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:19,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:19,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:19,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 19:20:19,540 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)] === [2024-06-27 19:20:19,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:19,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1527871854, now seen corresponding path program 1 times [2024-06-27 19:20:19,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:19,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107048831] [2024-06-27 19:20:19,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:19,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:19,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:19,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:19,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:19,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107048831] [2024-06-27 19:20:19,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107048831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:19,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:19,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:20:19,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127108916] [2024-06-27 19:20:19,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:19,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:20:19,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:19,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:20:19,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:20:19,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:19,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 401 transitions, 4289 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:19,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:19,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:19,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:20,305 INFO L124 PetriNetUnfolderBase]: 2079/3518 cut-off events. [2024-06-27 19:20:20,305 INFO L125 PetriNetUnfolderBase]: For 337978/337990 co-relation queries the response was YES. [2024-06-27 19:20:20,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25613 conditions, 3518 events. 2079/3518 cut-off events. For 337978/337990 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 21760 event pairs, 337 based on Foata normal form. 18/3535 useless extension candidates. Maximal degree in co-relation 25462. Up to 2470 conditions per place. [2024-06-27 19:20:20,342 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 337 selfloop transitions, 102 changer transitions 0/446 dead transitions. [2024-06-27 19:20:20,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 446 transitions, 5805 flow [2024-06-27 19:20:20,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:20:20,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:20:20,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-27 19:20:20,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5825 [2024-06-27 19:20:20,343 INFO L175 Difference]: Start difference. First operand has 328 places, 401 transitions, 4289 flow. Second operand 10 states and 233 transitions. [2024-06-27 19:20:20,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 446 transitions, 5805 flow [2024-06-27 19:20:22,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 446 transitions, 5682 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 19:20:22,107 INFO L231 Difference]: Finished difference. Result has 336 places, 406 transitions, 4469 flow [2024-06-27 19:20:22,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4168, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4469, PETRI_PLACES=336, PETRI_TRANSITIONS=406} [2024-06-27 19:20:22,108 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 295 predicate places. [2024-06-27 19:20:22,108 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 406 transitions, 4469 flow [2024-06-27 19:20:22,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:22,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:22,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:22,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 19:20:22,109 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)] === [2024-06-27 19:20:22,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:22,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1527871668, now seen corresponding path program 2 times [2024-06-27 19:20:22,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:22,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500253360] [2024-06-27 19:20:22,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:22,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:22,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:22,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:22,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:22,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500253360] [2024-06-27 19:20:22,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500253360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:22,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:22,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:20:22,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875000160] [2024-06-27 19:20:22,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:22,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:20:22,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:22,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:20:22,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:20:22,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:22,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 406 transitions, 4469 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:22,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:22,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:22,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:22,887 INFO L124 PetriNetUnfolderBase]: 2099/3554 cut-off events. [2024-06-27 19:20:22,888 INFO L125 PetriNetUnfolderBase]: For 347734/347746 co-relation queries the response was YES. [2024-06-27 19:20:22,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26124 conditions, 3554 events. 2099/3554 cut-off events. For 347734/347746 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 22071 event pairs, 313 based on Foata normal form. 18/3571 useless extension candidates. Maximal degree in co-relation 25970. Up to 2946 conditions per place. [2024-06-27 19:20:22,928 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 373 selfloop transitions, 57 changer transitions 0/437 dead transitions. [2024-06-27 19:20:22,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 437 transitions, 5433 flow [2024-06-27 19:20:22,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:20:22,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:20:22,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-27 19:20:22,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-27 19:20:22,929 INFO L175 Difference]: Start difference. First operand has 336 places, 406 transitions, 4469 flow. Second operand 8 states and 186 transitions. [2024-06-27 19:20:22,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 437 transitions, 5433 flow [2024-06-27 19:20:24,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 437 transitions, 5322 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 19:20:24,609 INFO L231 Difference]: Finished difference. Result has 340 places, 407 transitions, 4492 flow [2024-06-27 19:20:24,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4358, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4492, PETRI_PLACES=340, PETRI_TRANSITIONS=407} [2024-06-27 19:20:24,610 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 299 predicate places. [2024-06-27 19:20:24,610 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 407 transitions, 4492 flow [2024-06-27 19:20:24,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:24,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:24,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:24,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 19:20:24,610 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)] === [2024-06-27 19:20:24,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:24,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1705003188, now seen corresponding path program 3 times [2024-06-27 19:20:24,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:24,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834524259] [2024-06-27 19:20:24,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:24,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:24,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:24,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:24,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:24,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834524259] [2024-06-27 19:20:24,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834524259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:24,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:24,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:20:24,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092575230] [2024-06-27 19:20:24,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:24,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:20:24,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:24,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:20:24,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:20:24,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:24,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 407 transitions, 4492 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:24,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:24,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:24,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:25,403 INFO L124 PetriNetUnfolderBase]: 2176/3681 cut-off events. [2024-06-27 19:20:25,403 INFO L125 PetriNetUnfolderBase]: For 379493/379505 co-relation queries the response was YES. [2024-06-27 19:20:25,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27550 conditions, 3681 events. 2176/3681 cut-off events. For 379493/379505 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 22991 event pairs, 318 based on Foata normal form. 18/3698 useless extension candidates. Maximal degree in co-relation 27394. Up to 2988 conditions per place. [2024-06-27 19:20:25,445 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 375 selfloop transitions, 65 changer transitions 0/447 dead transitions. [2024-06-27 19:20:25,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 447 transitions, 5758 flow [2024-06-27 19:20:25,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:20:25,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:20:25,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-27 19:20:25,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-06-27 19:20:25,445 INFO L175 Difference]: Start difference. First operand has 340 places, 407 transitions, 4492 flow. Second operand 9 states and 203 transitions. [2024-06-27 19:20:25,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 447 transitions, 5758 flow [2024-06-27 19:20:26,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 447 transitions, 5620 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 19:20:26,878 INFO L231 Difference]: Finished difference. Result has 343 places, 415 transitions, 4595 flow [2024-06-27 19:20:26,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4368, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4595, PETRI_PLACES=343, PETRI_TRANSITIONS=415} [2024-06-27 19:20:26,878 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 302 predicate places. [2024-06-27 19:20:26,878 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 415 transitions, 4595 flow [2024-06-27 19:20:26,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:26,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:26,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:26,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 19:20:26,878 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)] === [2024-06-27 19:20:26,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:26,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1532513484, now seen corresponding path program 2 times [2024-06-27 19:20:26,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:26,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423365277] [2024-06-27 19:20:26,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:26,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:26,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:26,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:26,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423365277] [2024-06-27 19:20:26,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423365277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:26,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:26,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:20:26,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247070351] [2024-06-27 19:20:26,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:26,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:20:26,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:26,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:20:26,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:20:27,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:27,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 415 transitions, 4595 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:27,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:27,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:27,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:27,708 INFO L124 PetriNetUnfolderBase]: 2262/3823 cut-off events. [2024-06-27 19:20:27,708 INFO L125 PetriNetUnfolderBase]: For 437724/437736 co-relation queries the response was YES. [2024-06-27 19:20:27,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29803 conditions, 3823 events. 2262/3823 cut-off events. For 437724/437736 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 24016 event pairs, 352 based on Foata normal form. 18/3840 useless extension candidates. Maximal degree in co-relation 29646. Up to 2645 conditions per place. [2024-06-27 19:20:27,752 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 347 selfloop transitions, 103 changer transitions 0/457 dead transitions. [2024-06-27 19:20:27,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 457 transitions, 6311 flow [2024-06-27 19:20:27,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:20:27,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:20:27,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-27 19:20:27,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-06-27 19:20:27,753 INFO L175 Difference]: Start difference. First operand has 343 places, 415 transitions, 4595 flow. Second operand 10 states and 232 transitions. [2024-06-27 19:20:27,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 457 transitions, 6311 flow [2024-06-27 19:20:29,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 457 transitions, 6193 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 19:20:29,623 INFO L231 Difference]: Finished difference. Result has 349 places, 418 transitions, 4765 flow [2024-06-27 19:20:29,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4477, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4765, PETRI_PLACES=349, PETRI_TRANSITIONS=418} [2024-06-27 19:20:29,624 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 308 predicate places. [2024-06-27 19:20:29,624 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 418 transitions, 4765 flow [2024-06-27 19:20:29,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:29,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:29,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:29,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 19:20:29,624 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)] === [2024-06-27 19:20:29,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:29,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1705240524, now seen corresponding path program 3 times [2024-06-27 19:20:29,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:29,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604618092] [2024-06-27 19:20:29,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:29,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:29,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:29,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:29,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:29,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604618092] [2024-06-27 19:20:29,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604618092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:29,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:29,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:20:29,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554721718] [2024-06-27 19:20:29,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:29,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:20:29,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:29,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:20:29,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:20:29,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:29,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 418 transitions, 4765 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:29,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:29,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:29,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:30,439 INFO L124 PetriNetUnfolderBase]: 2249/3800 cut-off events. [2024-06-27 19:20:30,439 INFO L125 PetriNetUnfolderBase]: For 423145/423157 co-relation queries the response was YES. [2024-06-27 19:20:30,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29287 conditions, 3800 events. 2249/3800 cut-off events. For 423145/423157 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 23778 event pairs, 360 based on Foata normal form. 18/3817 useless extension candidates. Maximal degree in co-relation 29130. Up to 2639 conditions per place. [2024-06-27 19:20:30,481 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 341 selfloop transitions, 106 changer transitions 0/454 dead transitions. [2024-06-27 19:20:30,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 454 transitions, 6193 flow [2024-06-27 19:20:30,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:20:30,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:20:30,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-27 19:20:30,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5725 [2024-06-27 19:20:30,482 INFO L175 Difference]: Start difference. First operand has 349 places, 418 transitions, 4765 flow. Second operand 10 states and 229 transitions. [2024-06-27 19:20:30,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 454 transitions, 6193 flow [2024-06-27 19:20:32,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 454 transitions, 6027 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 19:20:32,223 INFO L231 Difference]: Finished difference. Result has 354 places, 418 transitions, 4815 flow [2024-06-27 19:20:32,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4599, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4815, PETRI_PLACES=354, PETRI_TRANSITIONS=418} [2024-06-27 19:20:32,223 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 313 predicate places. [2024-06-27 19:20:32,223 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 418 transitions, 4815 flow [2024-06-27 19:20:32,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:32,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:32,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:32,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 19:20:32,223 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)] === [2024-06-27 19:20:32,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:32,224 INFO L85 PathProgramCache]: Analyzing trace with hash 740101138, now seen corresponding path program 4 times [2024-06-27 19:20:32,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:32,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23027330] [2024-06-27 19:20:32,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:32,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:32,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:32,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:32,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23027330] [2024-06-27 19:20:32,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23027330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:32,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:32,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:20:32,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28811696] [2024-06-27 19:20:32,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:32,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:20:32,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:32,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:20:32,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:20:32,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:32,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 418 transitions, 4815 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:32,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:32,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:32,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:33,062 INFO L124 PetriNetUnfolderBase]: 2381/4008 cut-off events. [2024-06-27 19:20:33,062 INFO L125 PetriNetUnfolderBase]: For 520983/520991 co-relation queries the response was YES. [2024-06-27 19:20:33,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32496 conditions, 4008 events. 2381/4008 cut-off events. For 520983/520991 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 25326 event pairs, 541 based on Foata normal form. 14/4015 useless extension candidates. Maximal degree in co-relation 32338. Up to 3069 conditions per place. [2024-06-27 19:20:33,107 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 356 selfloop transitions, 98 changer transitions 0/461 dead transitions. [2024-06-27 19:20:33,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 461 transitions, 6335 flow [2024-06-27 19:20:33,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:20:33,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:20:33,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:20:33,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-27 19:20:33,107 INFO L175 Difference]: Start difference. First operand has 354 places, 418 transitions, 4815 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:20:33,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 461 transitions, 6335 flow [2024-06-27 19:20:35,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 461 transitions, 6125 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 19:20:35,054 INFO L231 Difference]: Finished difference. Result has 355 places, 422 transitions, 4891 flow [2024-06-27 19:20:35,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4605, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4891, PETRI_PLACES=355, PETRI_TRANSITIONS=422} [2024-06-27 19:20:35,054 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 314 predicate places. [2024-06-27 19:20:35,054 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 422 transitions, 4891 flow [2024-06-27 19:20:35,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:35,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:35,054 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] [2024-06-27 19:20:35,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 19:20:35,055 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)] === [2024-06-27 19:20:35,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:35,055 INFO L85 PathProgramCache]: Analyzing trace with hash 882204208, now seen corresponding path program 5 times [2024-06-27 19:20:35,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:35,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643372939] [2024-06-27 19:20:35,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:35,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:35,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:35,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:35,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643372939] [2024-06-27 19:20:35,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643372939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:35,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:35,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:20:35,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910369131] [2024-06-27 19:20:35,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:35,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:20:35,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:35,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:20:35,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:20:35,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:35,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 422 transitions, 4891 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:35,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:35,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:35,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:35,943 INFO L124 PetriNetUnfolderBase]: 2409/4053 cut-off events. [2024-06-27 19:20:35,944 INFO L125 PetriNetUnfolderBase]: For 540813/540821 co-relation queries the response was YES. [2024-06-27 19:20:35,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32973 conditions, 4053 events. 2409/4053 cut-off events. For 540813/540821 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 25609 event pairs, 583 based on Foata normal form. 16/4065 useless extension candidates. Maximal degree in co-relation 32813. Up to 3296 conditions per place. [2024-06-27 19:20:35,995 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 357 selfloop transitions, 95 changer transitions 0/459 dead transitions. [2024-06-27 19:20:35,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 459 transitions, 6169 flow [2024-06-27 19:20:35,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:20:35,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:20:35,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 19:20:35,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-27 19:20:35,996 INFO L175 Difference]: Start difference. First operand has 355 places, 422 transitions, 4891 flow. Second operand 8 states and 195 transitions. [2024-06-27 19:20:35,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 459 transitions, 6169 flow [2024-06-27 19:20:38,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 459 transitions, 6049 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 19:20:38,263 INFO L231 Difference]: Finished difference. Result has 360 places, 423 transitions, 4987 flow [2024-06-27 19:20:38,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4773, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4987, PETRI_PLACES=360, PETRI_TRANSITIONS=423} [2024-06-27 19:20:38,263 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 319 predicate places. [2024-06-27 19:20:38,263 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 423 transitions, 4987 flow [2024-06-27 19:20:38,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:38,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:38,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:38,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 19:20:38,263 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)] === [2024-06-27 19:20:38,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:38,264 INFO L85 PathProgramCache]: Analyzing trace with hash -962535718, now seen corresponding path program 6 times [2024-06-27 19:20:38,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:38,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228984880] [2024-06-27 19:20:38,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:38,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:38,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:38,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:38,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:38,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228984880] [2024-06-27 19:20:38,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228984880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:38,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:38,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:20:38,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892407064] [2024-06-27 19:20:38,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:38,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:20:38,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:38,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:20:38,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:20:38,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:38,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 423 transitions, 4987 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:38,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:38,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:38,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:39,098 INFO L124 PetriNetUnfolderBase]: 2437/4099 cut-off events. [2024-06-27 19:20:39,098 INFO L125 PetriNetUnfolderBase]: For 551571/551579 co-relation queries the response was YES. [2024-06-27 19:20:39,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33545 conditions, 4099 events. 2437/4099 cut-off events. For 551571/551579 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 25963 event pairs, 615 based on Foata normal form. 16/4113 useless extension candidates. Maximal degree in co-relation 33383. Up to 3506 conditions per place. [2024-06-27 19:20:39,146 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 351 selfloop transitions, 94 changer transitions 0/452 dead transitions. [2024-06-27 19:20:39,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 452 transitions, 6007 flow [2024-06-27 19:20:39,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:20:39,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:20:39,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-27 19:20:39,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-27 19:20:39,147 INFO L175 Difference]: Start difference. First operand has 360 places, 423 transitions, 4987 flow. Second operand 8 states and 188 transitions. [2024-06-27 19:20:39,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 452 transitions, 6007 flow [2024-06-27 19:20:41,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 452 transitions, 5798 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 19:20:41,461 INFO L231 Difference]: Finished difference. Result has 362 places, 424 transitions, 4995 flow [2024-06-27 19:20:41,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4782, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4995, PETRI_PLACES=362, PETRI_TRANSITIONS=424} [2024-06-27 19:20:41,462 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 321 predicate places. [2024-06-27 19:20:41,462 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 424 transitions, 4995 flow [2024-06-27 19:20:41,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:41,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:41,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:41,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 19:20:41,462 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)] === [2024-06-27 19:20:41,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:41,462 INFO L85 PathProgramCache]: Analyzing trace with hash 740221294, now seen corresponding path program 4 times [2024-06-27 19:20:41,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:41,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476223428] [2024-06-27 19:20:41,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:41,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:41,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:41,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:41,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:41,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476223428] [2024-06-27 19:20:41,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476223428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:41,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:41,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:20:41,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942520404] [2024-06-27 19:20:41,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:41,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:20:41,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:41,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:20:41,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:20:41,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:41,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 424 transitions, 4995 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:41,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:41,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:41,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:42,366 INFO L124 PetriNetUnfolderBase]: 2503/4197 cut-off events. [2024-06-27 19:20:42,366 INFO L125 PetriNetUnfolderBase]: For 590757/590769 co-relation queries the response was YES. [2024-06-27 19:20:42,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35103 conditions, 4197 events. 2503/4197 cut-off events. For 590757/590769 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 26650 event pairs, 599 based on Foata normal form. 18/4205 useless extension candidates. Maximal degree in co-relation 34940. Up to 3571 conditions per place. [2024-06-27 19:20:42,417 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 362 selfloop transitions, 93 changer transitions 0/462 dead transitions. [2024-06-27 19:20:42,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 462 transitions, 6296 flow [2024-06-27 19:20:42,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:20:42,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:20:42,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 246 transitions. [2024-06-27 19:20:42,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5590909090909091 [2024-06-27 19:20:42,417 INFO L175 Difference]: Start difference. First operand has 362 places, 424 transitions, 4995 flow. Second operand 11 states and 246 transitions. [2024-06-27 19:20:42,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 462 transitions, 6296 flow [2024-06-27 19:20:44,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 462 transitions, 6107 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 19:20:44,717 INFO L231 Difference]: Finished difference. Result has 368 places, 426 transitions, 5071 flow [2024-06-27 19:20:44,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4806, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5071, PETRI_PLACES=368, PETRI_TRANSITIONS=426} [2024-06-27 19:20:44,717 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 327 predicate places. [2024-06-27 19:20:44,717 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 426 transitions, 5071 flow [2024-06-27 19:20:44,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:44,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:44,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:44,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 19:20:44,718 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)] === [2024-06-27 19:20:44,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:44,718 INFO L85 PathProgramCache]: Analyzing trace with hash 740221108, now seen corresponding path program 7 times [2024-06-27 19:20:44,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:44,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018501952] [2024-06-27 19:20:44,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:44,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:44,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:44,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:44,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:44,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018501952] [2024-06-27 19:20:44,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018501952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:44,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:44,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:20:44,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546811852] [2024-06-27 19:20:44,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:44,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:20:44,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:44,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:20:44,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:20:44,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:44,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 426 transitions, 5071 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:44,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:44,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:44,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:45,622 INFO L124 PetriNetUnfolderBase]: 2490/4184 cut-off events. [2024-06-27 19:20:45,622 INFO L125 PetriNetUnfolderBase]: For 576651/576663 co-relation queries the response was YES. [2024-06-27 19:20:45,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34613 conditions, 4184 events. 2490/4184 cut-off events. For 576651/576663 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 26619 event pairs, 592 based on Foata normal form. 18/4190 useless extension candidates. Maximal degree in co-relation 34448. Up to 3678 conditions per place. [2024-06-27 19:20:45,677 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 401 selfloop transitions, 47 changer transitions 0/455 dead transitions. [2024-06-27 19:20:45,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 455 transitions, 6055 flow [2024-06-27 19:20:45,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:20:45,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:20:45,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-27 19:20:45,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-27 19:20:45,678 INFO L175 Difference]: Start difference. First operand has 368 places, 426 transitions, 5071 flow. Second operand 8 states and 185 transitions. [2024-06-27 19:20:45,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 455 transitions, 6055 flow [2024-06-27 19:20:48,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 455 transitions, 5886 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 19:20:48,030 INFO L231 Difference]: Finished difference. Result has 369 places, 426 transitions, 5000 flow [2024-06-27 19:20:48,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4902, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5000, PETRI_PLACES=369, PETRI_TRANSITIONS=426} [2024-06-27 19:20:48,030 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 328 predicate places. [2024-06-27 19:20:48,030 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 426 transitions, 5000 flow [2024-06-27 19:20:48,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:48,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:48,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:48,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 19:20:48,031 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)] === [2024-06-27 19:20:48,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:48,031 INFO L85 PathProgramCache]: Analyzing trace with hash -553870406, now seen corresponding path program 8 times [2024-06-27 19:20:48,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:48,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54629126] [2024-06-27 19:20:48,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:48,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:48,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:48,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:48,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:48,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54629126] [2024-06-27 19:20:48,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54629126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:48,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:48,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:20:48,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018372233] [2024-06-27 19:20:48,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:48,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:20:48,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:48,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:20:48,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:20:48,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:48,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 426 transitions, 5000 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:48,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:48,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:48,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:48,972 INFO L124 PetriNetUnfolderBase]: 2564/4307 cut-off events. [2024-06-27 19:20:48,972 INFO L125 PetriNetUnfolderBase]: For 626398/626410 co-relation queries the response was YES. [2024-06-27 19:20:49,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36162 conditions, 4307 events. 2564/4307 cut-off events. For 626398/626410 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 27511 event pairs, 619 based on Foata normal form. 18/4322 useless extension candidates. Maximal degree in co-relation 35996. Up to 3769 conditions per place. [2024-06-27 19:20:49,020 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 405 selfloop transitions, 48 changer transitions 0/460 dead transitions. [2024-06-27 19:20:49,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 460 transitions, 6295 flow [2024-06-27 19:20:49,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:20:49,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:20:49,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-27 19:20:49,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-06-27 19:20:49,021 INFO L175 Difference]: Start difference. First operand has 369 places, 426 transitions, 5000 flow. Second operand 9 states and 203 transitions. [2024-06-27 19:20:49,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 460 transitions, 6295 flow [2024-06-27 19:20:51,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 460 transitions, 6192 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 19:20:51,802 INFO L231 Difference]: Finished difference. Result has 373 places, 430 transitions, 5078 flow [2024-06-27 19:20:51,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4901, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5078, PETRI_PLACES=373, PETRI_TRANSITIONS=430} [2024-06-27 19:20:51,803 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 332 predicate places. [2024-06-27 19:20:51,803 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 430 transitions, 5078 flow [2024-06-27 19:20:51,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:51,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:51,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:51,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 19:20:51,803 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)] === [2024-06-27 19:20:51,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:51,804 INFO L85 PathProgramCache]: Analyzing trace with hash 747630604, now seen corresponding path program 5 times [2024-06-27 19:20:51,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:51,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346008776] [2024-06-27 19:20:51,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:51,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:51,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:51,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:51,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:51,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346008776] [2024-06-27 19:20:51,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346008776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:51,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:51,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:20:51,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988206771] [2024-06-27 19:20:51,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:51,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:20:51,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:51,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:20:51,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:20:51,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:51,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 430 transitions, 5078 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:51,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:51,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:51,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:52,802 INFO L124 PetriNetUnfolderBase]: 2630/4409 cut-off events. [2024-06-27 19:20:52,803 INFO L125 PetriNetUnfolderBase]: For 679046/679058 co-relation queries the response was YES. [2024-06-27 19:20:52,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37980 conditions, 4409 events. 2630/4409 cut-off events. For 679046/679058 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 28222 event pairs, 635 based on Foata normal form. 18/4424 useless extension candidates. Maximal degree in co-relation 37812. Up to 3822 conditions per place. [2024-06-27 19:20:52,857 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 367 selfloop transitions, 91 changer transitions 0/465 dead transitions. [2024-06-27 19:20:52,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 465 transitions, 6390 flow [2024-06-27 19:20:52,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:20:52,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:20:52,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 260 transitions. [2024-06-27 19:20:52,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-27 19:20:52,859 INFO L175 Difference]: Start difference. First operand has 373 places, 430 transitions, 5078 flow. Second operand 12 states and 260 transitions. [2024-06-27 19:20:52,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 465 transitions, 6390 flow [2024-06-27 19:20:55,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 465 transitions, 6292 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 19:20:55,687 INFO L231 Difference]: Finished difference. Result has 379 places, 432 transitions, 5226 flow [2024-06-27 19:20:55,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4980, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5226, PETRI_PLACES=379, PETRI_TRANSITIONS=432} [2024-06-27 19:20:55,688 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 338 predicate places. [2024-06-27 19:20:55,688 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 432 transitions, 5226 flow [2024-06-27 19:20:55,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:55,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:55,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:55,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 19:20:55,688 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)] === [2024-06-27 19:20:55,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:55,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1006066258, now seen corresponding path program 9 times [2024-06-27 19:20:55,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:55,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572097726] [2024-06-27 19:20:55,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:55,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:55,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:55,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:55,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:55,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572097726] [2024-06-27 19:20:55,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572097726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:55,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:55,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:20:55,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096329127] [2024-06-27 19:20:55,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:55,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:20:55,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:55,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:20:55,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:20:55,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:55,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 432 transitions, 5226 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:55,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:55,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:55,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:56,631 INFO L124 PetriNetUnfolderBase]: 2612/4389 cut-off events. [2024-06-27 19:20:56,631 INFO L125 PetriNetUnfolderBase]: For 664208/664220 co-relation queries the response was YES. [2024-06-27 19:20:56,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37231 conditions, 4389 events. 2612/4389 cut-off events. For 664208/664220 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 28184 event pairs, 637 based on Foata normal form. 20/4408 useless extension candidates. Maximal degree in co-relation 37062. Up to 3893 conditions per place. [2024-06-27 19:20:56,685 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 405 selfloop transitions, 45 changer transitions 0/457 dead transitions. [2024-06-27 19:20:56,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 457 transitions, 6226 flow [2024-06-27 19:20:56,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:20:56,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:20:56,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-27 19:20:56,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-27 19:20:56,686 INFO L175 Difference]: Start difference. First operand has 379 places, 432 transitions, 5226 flow. Second operand 8 states and 182 transitions. [2024-06-27 19:20:56,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 457 transitions, 6226 flow [2024-06-27 19:20:59,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 457 transitions, 6097 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 19:20:59,602 INFO L231 Difference]: Finished difference. Result has 379 places, 432 transitions, 5192 flow [2024-06-27 19:20:59,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5097, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5192, PETRI_PLACES=379, PETRI_TRANSITIONS=432} [2024-06-27 19:20:59,603 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 338 predicate places. [2024-06-27 19:20:59,603 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 432 transitions, 5192 flow [2024-06-27 19:20:59,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:59,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:59,603 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] [2024-06-27 19:20:59,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 19:20:59,603 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)] === [2024-06-27 19:20:59,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:59,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1006245004, now seen corresponding path program 6 times [2024-06-27 19:20:59,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:59,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966199670] [2024-06-27 19:20:59,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:59,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:59,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:59,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:59,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966199670] [2024-06-27 19:20:59,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966199670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:59,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:59,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:20:59,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012353033] [2024-06-27 19:20:59,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:59,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:20:59,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:59,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:20:59,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:20:59,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:59,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 432 transitions, 5192 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:59,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:59,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:59,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:00,616 INFO L124 PetriNetUnfolderBase]: 2594/4367 cut-off events. [2024-06-27 19:21:00,617 INFO L125 PetriNetUnfolderBase]: For 634886/634898 co-relation queries the response was YES. [2024-06-27 19:21:00,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36323 conditions, 4367 events. 2594/4367 cut-off events. For 634886/634898 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 28054 event pairs, 631 based on Foata normal form. 20/4386 useless extension candidates. Maximal degree in co-relation 36152. Up to 3818 conditions per place. [2024-06-27 19:21:00,674 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 365 selfloop transitions, 88 changer transitions 0/460 dead transitions. [2024-06-27 19:21:00,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 460 transitions, 6208 flow [2024-06-27 19:21:00,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:21:00,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:21:00,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-27 19:21:00,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5431818181818182 [2024-06-27 19:21:00,675 INFO L175 Difference]: Start difference. First operand has 379 places, 432 transitions, 5192 flow. Second operand 11 states and 239 transitions. [2024-06-27 19:21:00,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 460 transitions, 6208 flow [2024-06-27 19:21:03,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 460 transitions, 6113 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 19:21:03,978 INFO L231 Difference]: Finished difference. Result has 384 places, 432 transitions, 5278 flow [2024-06-27 19:21:03,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5097, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5278, PETRI_PLACES=384, PETRI_TRANSITIONS=432} [2024-06-27 19:21:03,979 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 343 predicate places. [2024-06-27 19:21:03,979 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 432 transitions, 5278 flow [2024-06-27 19:21:03,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:03,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:03,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:03,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 19:21:03,980 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)] === [2024-06-27 19:21:03,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:03,980 INFO L85 PathProgramCache]: Analyzing trace with hash 235415692, now seen corresponding path program 7 times [2024-06-27 19:21:03,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:03,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425557033] [2024-06-27 19:21:03,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:03,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:04,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:04,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:04,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425557033] [2024-06-27 19:21:04,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425557033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:04,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:04,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:21:04,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940808104] [2024-06-27 19:21:04,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:04,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:21:04,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:04,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:21:04,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:21:04,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:04,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 432 transitions, 5278 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:04,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:04,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:04,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:05,036 INFO L124 PetriNetUnfolderBase]: 2776/4639 cut-off events. [2024-06-27 19:21:05,036 INFO L125 PetriNetUnfolderBase]: For 764493/764505 co-relation queries the response was YES. [2024-06-27 19:21:05,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41084 conditions, 4639 events. 2776/4639 cut-off events. For 764493/764505 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 29950 event pairs, 649 based on Foata normal form. 18/4650 useless extension candidates. Maximal degree in co-relation 40912. Up to 3774 conditions per place. [2024-06-27 19:21:05,097 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 372 selfloop transitions, 97 changer transitions 0/476 dead transitions. [2024-06-27 19:21:05,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 476 transitions, 6988 flow [2024-06-27 19:21:05,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:21:05,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:21:05,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 245 transitions. [2024-06-27 19:21:05,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-27 19:21:05,098 INFO L175 Difference]: Start difference. First operand has 384 places, 432 transitions, 5278 flow. Second operand 11 states and 245 transitions. [2024-06-27 19:21:05,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 476 transitions, 6988 flow [2024-06-27 19:21:08,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 476 transitions, 6813 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 19:21:08,561 INFO L231 Difference]: Finished difference. Result has 388 places, 440 transitions, 5506 flow [2024-06-27 19:21:08,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5103, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5506, PETRI_PLACES=388, PETRI_TRANSITIONS=440} [2024-06-27 19:21:08,561 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 347 predicate places. [2024-06-27 19:21:08,562 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 440 transitions, 5506 flow [2024-06-27 19:21:08,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:08,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:08,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:08,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 19:21:08,562 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)] === [2024-06-27 19:21:08,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:08,562 INFO L85 PathProgramCache]: Analyzing trace with hash -657948492, now seen corresponding path program 10 times [2024-06-27 19:21:08,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:08,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526566610] [2024-06-27 19:21:08,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:08,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:08,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:08,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:08,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:08,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526566610] [2024-06-27 19:21:08,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526566610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:08,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:08,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:21:08,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713803640] [2024-06-27 19:21:08,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:08,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:21:08,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:08,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:21:08,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:21:08,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:08,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 440 transitions, 5506 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:08,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:08,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:08,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:09,625 INFO L124 PetriNetUnfolderBase]: 2921/4864 cut-off events. [2024-06-27 19:21:09,625 INFO L125 PetriNetUnfolderBase]: For 900603/900615 co-relation queries the response was YES. [2024-06-27 19:21:09,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45378 conditions, 4864 events. 2921/4864 cut-off events. For 900603/900615 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 31620 event pairs, 712 based on Foata normal form. 18/4873 useless extension candidates. Maximal degree in co-relation 45203. Up to 4141 conditions per place. [2024-06-27 19:21:09,688 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 405 selfloop transitions, 62 changer transitions 0/474 dead transitions. [2024-06-27 19:21:09,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 474 transitions, 6870 flow [2024-06-27 19:21:09,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:21:09,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:21:09,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-27 19:21:09,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-27 19:21:09,689 INFO L175 Difference]: Start difference. First operand has 388 places, 440 transitions, 5506 flow. Second operand 9 states and 201 transitions. [2024-06-27 19:21:09,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 474 transitions, 6870 flow [2024-06-27 19:21:13,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 474 transitions, 6749 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 19:21:13,239 INFO L231 Difference]: Finished difference. Result has 392 places, 446 transitions, 5649 flow [2024-06-27 19:21:13,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5385, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5649, PETRI_PLACES=392, PETRI_TRANSITIONS=446} [2024-06-27 19:21:13,240 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 351 predicate places. [2024-06-27 19:21:13,240 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 446 transitions, 5649 flow [2024-06-27 19:21:13,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:13,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:13,240 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] [2024-06-27 19:21:13,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 19:21:13,240 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)] === [2024-06-27 19:21:13,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:13,240 INFO L85 PathProgramCache]: Analyzing trace with hash -569234862, now seen corresponding path program 11 times [2024-06-27 19:21:13,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:13,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530000126] [2024-06-27 19:21:13,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:13,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:13,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:13,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:13,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:13,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530000126] [2024-06-27 19:21:13,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530000126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:13,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:13,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:21:13,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436391509] [2024-06-27 19:21:13,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:13,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:21:13,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:13,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:21:13,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:21:13,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:13,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 446 transitions, 5649 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:13,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:13,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:13,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:14,311 INFO L124 PetriNetUnfolderBase]: 2903/4850 cut-off events. [2024-06-27 19:21:14,311 INFO L125 PetriNetUnfolderBase]: For 885480/885492 co-relation queries the response was YES. [2024-06-27 19:21:14,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44887 conditions, 4850 events. 2903/4850 cut-off events. For 885480/885492 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 31588 event pairs, 722 based on Foata normal form. 20/4869 useless extension candidates. Maximal degree in co-relation 44709. Up to 4336 conditions per place. [2024-06-27 19:21:14,376 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 411 selfloop transitions, 51 changer transitions 0/469 dead transitions. [2024-06-27 19:21:14,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 469 transitions, 6667 flow [2024-06-27 19:21:14,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:21:14,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:21:14,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-27 19:21:14,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5472222222222223 [2024-06-27 19:21:14,377 INFO L175 Difference]: Start difference. First operand has 392 places, 446 transitions, 5649 flow. Second operand 9 states and 197 transitions. [2024-06-27 19:21:14,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 469 transitions, 6667 flow [2024-06-27 19:21:18,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 469 transitions, 6554 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 19:21:18,561 INFO L231 Difference]: Finished difference. Result has 396 places, 446 transitions, 5643 flow [2024-06-27 19:21:18,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5536, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5643, PETRI_PLACES=396, PETRI_TRANSITIONS=446} [2024-06-27 19:21:18,562 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 355 predicate places. [2024-06-27 19:21:18,562 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 446 transitions, 5643 flow [2024-06-27 19:21:18,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:18,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:18,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:18,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 19:21:18,562 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)] === [2024-06-27 19:21:18,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:18,562 INFO L85 PathProgramCache]: Analyzing trace with hash -569056116, now seen corresponding path program 8 times [2024-06-27 19:21:18,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:18,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449728282] [2024-06-27 19:21:18,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:18,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:18,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:18,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449728282] [2024-06-27 19:21:18,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449728282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:18,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:18,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:21:18,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315107684] [2024-06-27 19:21:18,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:18,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:21:18,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:18,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:21:18,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:21:18,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:18,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 446 transitions, 5643 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:18,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:18,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:18,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:19,657 INFO L124 PetriNetUnfolderBase]: 2931/4898 cut-off events. [2024-06-27 19:21:19,657 INFO L125 PetriNetUnfolderBase]: For 902597/902609 co-relation queries the response was YES. [2024-06-27 19:21:19,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45308 conditions, 4898 events. 2931/4898 cut-off events. For 902597/902609 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 32005 event pairs, 728 based on Foata normal form. 20/4917 useless extension candidates. Maximal degree in co-relation 45129. Up to 4337 conditions per place. [2024-06-27 19:21:19,721 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 380 selfloop transitions, 86 changer transitions 0/473 dead transitions. [2024-06-27 19:21:19,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 473 transitions, 6713 flow [2024-06-27 19:21:19,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:21:19,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:21:19,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 255 transitions. [2024-06-27 19:21:19,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-27 19:21:19,722 INFO L175 Difference]: Start difference. First operand has 396 places, 446 transitions, 5643 flow. Second operand 12 states and 255 transitions. [2024-06-27 19:21:19,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 473 transitions, 6713 flow [2024-06-27 19:21:23,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 473 transitions, 6606 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 19:21:23,703 INFO L231 Difference]: Finished difference. Result has 401 places, 447 transitions, 5749 flow [2024-06-27 19:21:23,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5536, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5749, PETRI_PLACES=401, PETRI_TRANSITIONS=447} [2024-06-27 19:21:23,704 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 360 predicate places. [2024-06-27 19:21:23,704 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 447 transitions, 5749 flow [2024-06-27 19:21:23,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:23,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:23,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:23,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 19:21:23,704 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)] === [2024-06-27 19:21:23,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:23,704 INFO L85 PathProgramCache]: Analyzing trace with hash -657711156, now seen corresponding path program 9 times [2024-06-27 19:21:23,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:23,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004704281] [2024-06-27 19:21:23,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:23,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:23,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:23,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:23,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:23,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004704281] [2024-06-27 19:21:23,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004704281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:23,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:23,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:21:23,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043731408] [2024-06-27 19:21:23,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:23,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:21:23,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:23,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:21:23,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:21:23,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:23,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 447 transitions, 5749 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:23,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:23,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:23,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:24,930 INFO L124 PetriNetUnfolderBase]: 3017/5024 cut-off events. [2024-06-27 19:21:24,931 INFO L125 PetriNetUnfolderBase]: For 976404/976416 co-relation queries the response was YES. [2024-06-27 19:21:24,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47949 conditions, 5024 events. 3017/5024 cut-off events. For 976404/976416 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 32836 event pairs, 706 based on Foata normal form. 18/5033 useless extension candidates. Maximal degree in co-relation 47769. Up to 4035 conditions per place. [2024-06-27 19:21:24,990 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 373 selfloop transitions, 103 changer transitions 0/483 dead transitions. [2024-06-27 19:21:24,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 483 transitions, 7381 flow [2024-06-27 19:21:24,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:21:24,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:21:24,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 244 transitions. [2024-06-27 19:21:24,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5545454545454546 [2024-06-27 19:21:24,991 INFO L175 Difference]: Start difference. First operand has 401 places, 447 transitions, 5749 flow. Second operand 11 states and 244 transitions. [2024-06-27 19:21:24,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 483 transitions, 7381 flow [2024-06-27 19:21:29,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 483 transitions, 7200 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-27 19:21:29,719 INFO L231 Difference]: Finished difference. Result has 402 places, 450 transitions, 5876 flow [2024-06-27 19:21:29,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5568, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5876, PETRI_PLACES=402, PETRI_TRANSITIONS=450} [2024-06-27 19:21:29,720 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 361 predicate places. [2024-06-27 19:21:29,720 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 450 transitions, 5876 flow [2024-06-27 19:21:29,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:29,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:29,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:29,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 19:21:29,720 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)] === [2024-06-27 19:21:29,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:29,720 INFO L85 PathProgramCache]: Analyzing trace with hash -144599782, now seen corresponding path program 12 times [2024-06-27 19:21:29,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:29,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700911726] [2024-06-27 19:21:29,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:29,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:29,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:29,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:29,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:29,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700911726] [2024-06-27 19:21:29,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700911726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:29,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:29,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:21:29,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975065867] [2024-06-27 19:21:29,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:29,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:21:29,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:29,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:21:29,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:21:29,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:29,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 450 transitions, 5876 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:29,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:29,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:29,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:30,981 INFO L124 PetriNetUnfolderBase]: 3004/5011 cut-off events. [2024-06-27 19:21:30,981 INFO L125 PetriNetUnfolderBase]: For 963135/963147 co-relation queries the response was YES. [2024-06-27 19:21:31,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47490 conditions, 5011 events. 3004/5011 cut-off events. For 963135/963147 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 32857 event pairs, 749 based on Foata normal form. 18/5026 useless extension candidates. Maximal degree in co-relation 47309. Up to 4465 conditions per place. [2024-06-27 19:21:31,038 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 416 selfloop transitions, 54 changer transitions 0/477 dead transitions. [2024-06-27 19:21:31,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 477 transitions, 6936 flow [2024-06-27 19:21:31,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:21:31,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:21:31,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-27 19:21:31,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425 [2024-06-27 19:21:31,039 INFO L175 Difference]: Start difference. First operand has 402 places, 450 transitions, 5876 flow. Second operand 10 states and 217 transitions. [2024-06-27 19:21:31,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 477 transitions, 6936 flow [2024-06-27 19:21:35,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 477 transitions, 6750 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 19:21:35,828 INFO L231 Difference]: Finished difference. Result has 405 places, 450 transitions, 5802 flow [2024-06-27 19:21:35,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5690, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5802, PETRI_PLACES=405, PETRI_TRANSITIONS=450} [2024-06-27 19:21:35,828 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 364 predicate places. [2024-06-27 19:21:35,828 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 450 transitions, 5802 flow [2024-06-27 19:21:35,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:35,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:35,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:35,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 19:21:35,829 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)] === [2024-06-27 19:21:35,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:35,829 INFO L85 PathProgramCache]: Analyzing trace with hash -181467648, now seen corresponding path program 10 times [2024-06-27 19:21:35,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:35,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299672354] [2024-06-27 19:21:35,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:35,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:35,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:35,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:35,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:35,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299672354] [2024-06-27 19:21:35,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299672354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:35,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:35,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:21:35,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416328187] [2024-06-27 19:21:35,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:35,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:21:35,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:35,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:21:35,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:21:36,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:36,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 450 transitions, 5802 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:36,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:36,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:36,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:37,017 INFO L124 PetriNetUnfolderBase]: 2991/4992 cut-off events. [2024-06-27 19:21:37,017 INFO L125 PetriNetUnfolderBase]: For 942976/942988 co-relation queries the response was YES. [2024-06-27 19:21:37,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46529 conditions, 4992 events. 2991/4992 cut-off events. For 942976/942988 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 32720 event pairs, 742 based on Foata normal form. 18/5007 useless extension candidates. Maximal degree in co-relation 46347. Up to 4353 conditions per place. [2024-06-27 19:21:37,093 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 383 selfloop transitions, 90 changer transitions 0/480 dead transitions. [2024-06-27 19:21:37,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 480 transitions, 7096 flow [2024-06-27 19:21:37,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:21:37,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:21:37,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 258 transitions. [2024-06-27 19:21:37,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-27 19:21:37,094 INFO L175 Difference]: Start difference. First operand has 405 places, 450 transitions, 5802 flow. Second operand 12 states and 258 transitions. [2024-06-27 19:21:37,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 480 transitions, 7096 flow [2024-06-27 19:21:42,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 480 transitions, 6984 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 19:21:42,334 INFO L231 Difference]: Finished difference. Result has 410 places, 450 transitions, 5874 flow [2024-06-27 19:21:42,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5690, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5874, PETRI_PLACES=410, PETRI_TRANSITIONS=450} [2024-06-27 19:21:42,334 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 369 predicate places. [2024-06-27 19:21:42,335 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 450 transitions, 5874 flow [2024-06-27 19:21:42,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:42,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:42,335 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] [2024-06-27 19:21:42,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 19:21:42,335 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)] === [2024-06-27 19:21:42,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:42,336 INFO L85 PathProgramCache]: Analyzing trace with hash -814718542, now seen corresponding path program 11 times [2024-06-27 19:21:42,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:42,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460836855] [2024-06-27 19:21:42,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:42,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:42,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:42,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:42,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:42,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460836855] [2024-06-27 19:21:42,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460836855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:42,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:42,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:21:42,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287072988] [2024-06-27 19:21:42,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:42,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:21:42,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:42,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:21:42,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:21:42,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:42,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 450 transitions, 5874 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:42,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:42,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:42,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:43,465 INFO L124 PetriNetUnfolderBase]: 2973/4968 cut-off events. [2024-06-27 19:21:43,465 INFO L125 PetriNetUnfolderBase]: For 925465/925477 co-relation queries the response was YES. [2024-06-27 19:21:43,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45638 conditions, 4968 events. 2973/4968 cut-off events. For 925465/925477 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 32568 event pairs, 742 based on Foata normal form. 20/4987 useless extension candidates. Maximal degree in co-relation 45455. Up to 4407 conditions per place. [2024-06-27 19:21:43,533 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 382 selfloop transitions, 85 changer transitions 0/474 dead transitions. [2024-06-27 19:21:43,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 474 transitions, 6908 flow [2024-06-27 19:21:43,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:21:43,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:21:43,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-27 19:21:43,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5475 [2024-06-27 19:21:43,534 INFO L175 Difference]: Start difference. First operand has 410 places, 450 transitions, 5874 flow. Second operand 10 states and 219 transitions. [2024-06-27 19:21:43,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 474 transitions, 6908 flow [2024-06-27 19:21:48,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 474 transitions, 6717 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-27 19:21:48,169 INFO L231 Difference]: Finished difference. Result has 411 places, 450 transitions, 5858 flow [2024-06-27 19:21:48,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5683, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5858, PETRI_PLACES=411, PETRI_TRANSITIONS=450} [2024-06-27 19:21:48,170 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 370 predicate places. [2024-06-27 19:21:48,170 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 450 transitions, 5858 flow [2024-06-27 19:21:48,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:48,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:48,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:48,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 19:21:48,170 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)] === [2024-06-27 19:21:48,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:48,171 INFO L85 PathProgramCache]: Analyzing trace with hash -344011926, now seen corresponding path program 12 times [2024-06-27 19:21:48,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:48,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533861442] [2024-06-27 19:21:48,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:48,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:48,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:48,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:48,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:48,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533861442] [2024-06-27 19:21:48,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533861442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:48,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:48,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:21:48,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977189413] [2024-06-27 19:21:48,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:48,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:21:48,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:48,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:21:48,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:21:48,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:48,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 450 transitions, 5858 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:48,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:48,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:48,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:49,260 INFO L124 PetriNetUnfolderBase]: 2955/4942 cut-off events. [2024-06-27 19:21:49,260 INFO L125 PetriNetUnfolderBase]: For 891835/891847 co-relation queries the response was YES. [2024-06-27 19:21:49,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44541 conditions, 4942 events. 2955/4942 cut-off events. For 891835/891847 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 32391 event pairs, 718 based on Foata normal form. 20/4961 useless extension candidates. Maximal degree in co-relation 44357. Up to 4191 conditions per place. [2024-06-27 19:21:49,325 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 383 selfloop transitions, 89 changer transitions 0/479 dead transitions. [2024-06-27 19:21:49,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 479 transitions, 7174 flow [2024-06-27 19:21:49,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:21:49,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:21:49,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-27 19:21:49,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5575 [2024-06-27 19:21:49,326 INFO L175 Difference]: Start difference. First operand has 411 places, 450 transitions, 5858 flow. Second operand 10 states and 223 transitions. [2024-06-27 19:21:49,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 479 transitions, 7174 flow [2024-06-27 19:21:53,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 479 transitions, 6995 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 19:21:53,890 INFO L231 Difference]: Finished difference. Result has 413 places, 450 transitions, 5861 flow [2024-06-27 19:21:53,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5679, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5861, PETRI_PLACES=413, PETRI_TRANSITIONS=450} [2024-06-27 19:21:53,890 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 372 predicate places. [2024-06-27 19:21:53,890 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 450 transitions, 5861 flow [2024-06-27 19:21:53,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:53,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:53,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:53,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 19:21:53,890 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)] === [2024-06-27 19:21:53,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:53,891 INFO L85 PathProgramCache]: Analyzing trace with hash 442866510, now seen corresponding path program 13 times [2024-06-27 19:21:53,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:53,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088292502] [2024-06-27 19:21:53,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:53,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:53,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:54,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:54,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:54,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088292502] [2024-06-27 19:21:54,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088292502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:54,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:54,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:21:54,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072027931] [2024-06-27 19:21:54,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:54,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:21:54,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:54,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:21:54,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:21:54,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:54,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 450 transitions, 5861 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:54,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:54,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:54,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:55,055 INFO L124 PetriNetUnfolderBase]: 3062/5106 cut-off events. [2024-06-27 19:21:55,055 INFO L125 PetriNetUnfolderBase]: For 996443/996451 co-relation queries the response was YES. [2024-06-27 19:21:55,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47429 conditions, 5106 events. 3062/5106 cut-off events. For 996443/996451 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 33568 event pairs, 774 based on Foata normal form. 16/5120 useless extension candidates. Maximal degree in co-relation 47244. Up to 4312 conditions per place. [2024-06-27 19:21:55,117 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 404 selfloop transitions, 74 changer transitions 0/485 dead transitions. [2024-06-27 19:21:55,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 485 transitions, 7263 flow [2024-06-27 19:21:55,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:21:55,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:21:55,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:21:55,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-27 19:21:55,118 INFO L175 Difference]: Start difference. First operand has 413 places, 450 transitions, 5861 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:21:55,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 485 transitions, 7263 flow [2024-06-27 19:22:01,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 485 transitions, 7091 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 19:22:01,161 INFO L231 Difference]: Finished difference. Result has 413 places, 453 transitions, 5926 flow [2024-06-27 19:22:01,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5689, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5926, PETRI_PLACES=413, PETRI_TRANSITIONS=453} [2024-06-27 19:22:01,161 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 372 predicate places. [2024-06-27 19:22:01,161 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 453 transitions, 5926 flow [2024-06-27 19:22:01,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:01,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:01,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:01,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 19:22:01,162 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)] === [2024-06-27 19:22:01,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:01,162 INFO L85 PathProgramCache]: Analyzing trace with hash 451437390, now seen corresponding path program 14 times [2024-06-27 19:22:01,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:01,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54531789] [2024-06-27 19:22:01,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:01,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:01,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:01,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:01,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:01,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54531789] [2024-06-27 19:22:01,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54531789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:01,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:01,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:22:01,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222265187] [2024-06-27 19:22:01,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:01,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:22:01,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:01,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:22:01,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:22:01,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:01,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 453 transitions, 5926 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:01,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:01,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:01,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:02,320 INFO L124 PetriNetUnfolderBase]: 3090/5150 cut-off events. [2024-06-27 19:22:02,320 INFO L125 PetriNetUnfolderBase]: For 1015699/1015707 co-relation queries the response was YES. [2024-06-27 19:22:02,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48015 conditions, 5150 events. 3090/5150 cut-off events. For 1015699/1015707 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 33910 event pairs, 794 based on Foata normal form. 16/5164 useless extension candidates. Maximal degree in co-relation 47828. Up to 4564 conditions per place. [2024-06-27 19:22:02,390 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 399 selfloop transitions, 72 changer transitions 0/478 dead transitions. [2024-06-27 19:22:02,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 478 transitions, 6993 flow [2024-06-27 19:22:02,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:22:02,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:22:02,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 19:22:02,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-27 19:22:02,391 INFO L175 Difference]: Start difference. First operand has 413 places, 453 transitions, 5926 flow. Second operand 7 states and 166 transitions. [2024-06-27 19:22:02,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 478 transitions, 6993 flow [2024-06-27 19:22:08,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 478 transitions, 6883 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 19:22:08,177 INFO L231 Difference]: Finished difference. Result has 417 places, 454 transitions, 5994 flow [2024-06-27 19:22:08,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5822, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5994, PETRI_PLACES=417, PETRI_TRANSITIONS=454} [2024-06-27 19:22:08,178 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 376 predicate places. [2024-06-27 19:22:08,178 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 454 transitions, 5994 flow [2024-06-27 19:22:08,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:08,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:08,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:08,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 19:22:08,178 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)] === [2024-06-27 19:22:08,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:08,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1301146394, now seen corresponding path program 15 times [2024-06-27 19:22:08,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:08,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090660791] [2024-06-27 19:22:08,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:08,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:08,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:08,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:08,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090660791] [2024-06-27 19:22:08,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090660791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:08,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:08,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:22:08,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372877575] [2024-06-27 19:22:08,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:08,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:22:08,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:08,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:22:08,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:22:08,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:08,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 454 transitions, 5994 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:08,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:08,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:08,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:09,365 INFO L124 PetriNetUnfolderBase]: 3151/5246 cut-off events. [2024-06-27 19:22:09,366 INFO L125 PetriNetUnfolderBase]: For 1070904/1070916 co-relation queries the response was YES. [2024-06-27 19:22:09,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49517 conditions, 5246 events. 3151/5246 cut-off events. For 1070904/1070916 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 34616 event pairs, 786 based on Foata normal form. 20/5265 useless extension candidates. Maximal degree in co-relation 49328. Up to 4483 conditions per place. [2024-06-27 19:22:09,436 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 412 selfloop transitions, 77 changer transitions 0/496 dead transitions. [2024-06-27 19:22:09,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 496 transitions, 7424 flow [2024-06-27 19:22:09,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:22:09,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:22:09,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-27 19:22:09,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 19:22:09,436 INFO L175 Difference]: Start difference. First operand has 417 places, 454 transitions, 5994 flow. Second operand 9 states and 216 transitions. [2024-06-27 19:22:09,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 496 transitions, 7424 flow [2024-06-27 19:22:15,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 496 transitions, 7277 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 19:22:15,241 INFO L231 Difference]: Finished difference. Result has 421 places, 456 transitions, 6059 flow [2024-06-27 19:22:15,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5847, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6059, PETRI_PLACES=421, PETRI_TRANSITIONS=456} [2024-06-27 19:22:15,242 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 380 predicate places. [2024-06-27 19:22:15,242 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 456 transitions, 6059 flow [2024-06-27 19:22:15,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:15,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:15,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:15,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 19:22:15,242 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)] === [2024-06-27 19:22:15,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:15,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1309717274, now seen corresponding path program 16 times [2024-06-27 19:22:15,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:15,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186730443] [2024-06-27 19:22:15,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:15,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:15,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:15,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:15,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:15,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186730443] [2024-06-27 19:22:15,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186730443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:15,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:15,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:22:15,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37658219] [2024-06-27 19:22:15,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:15,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:22:15,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:15,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:22:15,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:22:15,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:15,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 456 transitions, 6059 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:15,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:15,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:15,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:16,463 INFO L124 PetriNetUnfolderBase]: 3179/5290 cut-off events. [2024-06-27 19:22:16,463 INFO L125 PetriNetUnfolderBase]: For 1090988/1091000 co-relation queries the response was YES. [2024-06-27 19:22:16,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50090 conditions, 5290 events. 3179/5290 cut-off events. For 1090988/1091000 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 35002 event pairs, 806 based on Foata normal form. 20/5309 useless extension candidates. Maximal degree in co-relation 49900. Up to 4703 conditions per place. [2024-06-27 19:22:16,536 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 405 selfloop transitions, 77 changer transitions 0/489 dead transitions. [2024-06-27 19:22:16,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 489 transitions, 7169 flow [2024-06-27 19:22:16,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:22:16,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:22:16,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-27 19:22:16,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-06-27 19:22:16,537 INFO L175 Difference]: Start difference. First operand has 421 places, 456 transitions, 6059 flow. Second operand 9 states and 209 transitions. [2024-06-27 19:22:16,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 489 transitions, 7169 flow [2024-06-27 19:22:22,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 489 transitions, 7045 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 19:22:22,425 INFO L231 Difference]: Finished difference. Result has 425 places, 457 transitions, 6124 flow [2024-06-27 19:22:22,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5945, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6124, PETRI_PLACES=425, PETRI_TRANSITIONS=457} [2024-06-27 19:22:22,426 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 384 predicate places. [2024-06-27 19:22:22,426 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 457 transitions, 6124 flow [2024-06-27 19:22:22,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:22,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:22,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:22,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 19:22:22,426 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)] === [2024-06-27 19:22:22,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:22,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1596604604, now seen corresponding path program 17 times [2024-06-27 19:22:22,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:22,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110065924] [2024-06-27 19:22:22,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:22,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:22,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:22,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110065924] [2024-06-27 19:22:22,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110065924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:22,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:22,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:22:22,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371781036] [2024-06-27 19:22:22,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:22,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:22:22,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:22,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:22:22,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:22:22,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:22,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 457 transitions, 6124 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:22,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:22,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:22,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:23,644 INFO L124 PetriNetUnfolderBase]: 3207/5334 cut-off events. [2024-06-27 19:22:23,644 INFO L125 PetriNetUnfolderBase]: For 1107717/1107729 co-relation queries the response was YES. [2024-06-27 19:22:23,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50459 conditions, 5334 events. 3207/5334 cut-off events. For 1107717/1107729 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 35393 event pairs, 810 based on Foata normal form. 20/5353 useless extension candidates. Maximal degree in co-relation 50267. Up to 4747 conditions per place. [2024-06-27 19:22:23,715 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 400 selfloop transitions, 81 changer transitions 0/488 dead transitions. [2024-06-27 19:22:23,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 488 transitions, 7218 flow [2024-06-27 19:22:23,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:22:23,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:22:23,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-27 19:22:23,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2024-06-27 19:22:23,716 INFO L175 Difference]: Start difference. First operand has 425 places, 457 transitions, 6124 flow. Second operand 10 states and 224 transitions. [2024-06-27 19:22:23,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 488 transitions, 7218 flow [2024-06-27 19:22:29,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 488 transitions, 7063 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 19:22:29,923 INFO L231 Difference]: Finished difference. Result has 428 places, 458 transitions, 6158 flow [2024-06-27 19:22:29,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5969, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6158, PETRI_PLACES=428, PETRI_TRANSITIONS=458} [2024-06-27 19:22:29,924 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 387 predicate places. [2024-06-27 19:22:29,924 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 458 transitions, 6158 flow [2024-06-27 19:22:29,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:29,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:29,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:29,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 19:22:29,924 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)] === [2024-06-27 19:22:29,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:29,925 INFO L85 PathProgramCache]: Analyzing trace with hash 300763440, now seen corresponding path program 18 times [2024-06-27 19:22:29,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:29,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667925934] [2024-06-27 19:22:29,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:29,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:30,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:30,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:30,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667925934] [2024-06-27 19:22:30,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667925934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:30,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:30,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:22:30,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287226355] [2024-06-27 19:22:30,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:30,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:22:30,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:30,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:22:30,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:22:30,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:30,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 458 transitions, 6158 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:30,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:30,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:30,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:31,176 INFO L124 PetriNetUnfolderBase]: 3227/5371 cut-off events. [2024-06-27 19:22:31,176 INFO L125 PetriNetUnfolderBase]: For 1113044/1113052 co-relation queries the response was YES. [2024-06-27 19:22:31,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50895 conditions, 5371 events. 3227/5371 cut-off events. For 1113044/1113052 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 35610 event pairs, 613 based on Foata normal form. 14/5383 useless extension candidates. Maximal degree in co-relation 50702. Up to 3979 conditions per place. [2024-06-27 19:22:31,247 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 393 selfloop transitions, 94 changer transitions 0/494 dead transitions. [2024-06-27 19:22:31,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 494 transitions, 7778 flow [2024-06-27 19:22:31,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:22:31,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:22:31,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 19:22:31,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-27 19:22:31,248 INFO L175 Difference]: Start difference. First operand has 428 places, 458 transitions, 6158 flow. Second operand 7 states and 176 transitions. [2024-06-27 19:22:31,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 494 transitions, 7778 flow [2024-06-27 19:22:38,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 494 transitions, 7613 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 19:22:38,097 INFO L231 Difference]: Finished difference. Result has 427 places, 459 transitions, 6213 flow [2024-06-27 19:22:38,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5993, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6213, PETRI_PLACES=427, PETRI_TRANSITIONS=459} [2024-06-27 19:22:38,097 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 386 predicate places. [2024-06-27 19:22:38,098 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 459 transitions, 6213 flow [2024-06-27 19:22:38,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:38,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:38,098 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] [2024-06-27 19:22:38,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 19:22:38,098 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)] === [2024-06-27 19:22:38,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:38,098 INFO L85 PathProgramCache]: Analyzing trace with hash 300883410, now seen corresponding path program 19 times [2024-06-27 19:22:38,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:38,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750983867] [2024-06-27 19:22:38,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:38,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:38,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:38,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:38,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:38,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750983867] [2024-06-27 19:22:38,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750983867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:38,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:38,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:22:38,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063454324] [2024-06-27 19:22:38,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:38,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:22:38,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:38,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:22:38,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:22:38,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:38,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 459 transitions, 6213 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:38,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:38,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:38,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:39,427 INFO L124 PetriNetUnfolderBase]: 3214/5353 cut-off events. [2024-06-27 19:22:39,427 INFO L125 PetriNetUnfolderBase]: For 1092468/1092480 co-relation queries the response was YES. [2024-06-27 19:22:39,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50460 conditions, 5353 events. 3214/5353 cut-off events. For 1092468/1092480 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 35488 event pairs, 596 based on Foata normal form. 18/5370 useless extension candidates. Maximal degree in co-relation 50266. Up to 4776 conditions per place. [2024-06-27 19:22:39,492 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 431 selfloop transitions, 46 changer transitions 0/484 dead transitions. [2024-06-27 19:22:39,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 484 transitions, 7245 flow [2024-06-27 19:22:39,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:22:39,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:22:39,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-27 19:22:39,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-27 19:22:39,493 INFO L175 Difference]: Start difference. First operand has 427 places, 459 transitions, 6213 flow. Second operand 7 states and 165 transitions. [2024-06-27 19:22:39,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 484 transitions, 7245 flow [2024-06-27 19:22:46,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 484 transitions, 6743 flow, removed 23 selfloop flow, removed 10 redundant places. [2024-06-27 19:22:46,481 INFO L231 Difference]: Finished difference. Result has 424 places, 459 transitions, 5807 flow [2024-06-27 19:22:46,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5711, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5807, PETRI_PLACES=424, PETRI_TRANSITIONS=459} [2024-06-27 19:22:46,481 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 383 predicate places. [2024-06-27 19:22:46,481 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 459 transitions, 5807 flow [2024-06-27 19:22:46,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:46,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:46,482 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] [2024-06-27 19:22:46,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 19:22:46,482 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)] === [2024-06-27 19:22:46,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:46,482 INFO L85 PathProgramCache]: Analyzing trace with hash 300883596, now seen corresponding path program 13 times [2024-06-27 19:22:46,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:46,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134345332] [2024-06-27 19:22:46,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:46,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:46,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:46,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:46,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:46,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134345332] [2024-06-27 19:22:46,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134345332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:46,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:46,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:22:46,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427394421] [2024-06-27 19:22:46,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:46,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:22:46,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:46,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:22:46,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:22:46,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:46,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 459 transitions, 5807 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:46,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:46,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:46,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:47,696 INFO L124 PetriNetUnfolderBase]: 3201/5332 cut-off events. [2024-06-27 19:22:47,697 INFO L125 PetriNetUnfolderBase]: For 1062724/1062736 co-relation queries the response was YES. [2024-06-27 19:22:47,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48196 conditions, 5332 events. 3201/5332 cut-off events. For 1062724/1062736 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 35356 event pairs, 576 based on Foata normal form. 18/5349 useless extension candidates. Maximal degree in co-relation 48006. Up to 4410 conditions per place. [2024-06-27 19:22:47,902 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 407 selfloop transitions, 75 changer transitions 0/489 dead transitions. [2024-06-27 19:22:47,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 489 transitions, 7141 flow [2024-06-27 19:22:47,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:22:47,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:22:47,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:22:47,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-27 19:22:47,903 INFO L175 Difference]: Start difference. First operand has 424 places, 459 transitions, 5807 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:22:47,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 489 transitions, 7141 flow [2024-06-27 19:22:52,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 489 transitions, 7029 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 19:22:52,668 INFO L231 Difference]: Finished difference. Result has 426 places, 459 transitions, 5851 flow [2024-06-27 19:22:52,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5695, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5851, PETRI_PLACES=426, PETRI_TRANSITIONS=459} [2024-06-27 19:22:52,669 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 385 predicate places. [2024-06-27 19:22:52,669 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 459 transitions, 5851 flow [2024-06-27 19:22:52,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:52,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:52,669 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] [2024-06-27 19:22:52,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 19:22:52,669 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)] === [2024-06-27 19:22:52,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:52,670 INFO L85 PathProgramCache]: Analyzing trace with hash 308292906, now seen corresponding path program 14 times [2024-06-27 19:22:52,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:52,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504284447] [2024-06-27 19:22:52,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:52,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:52,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:52,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:52,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:52,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504284447] [2024-06-27 19:22:52,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504284447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:52,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:52,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:22:52,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436545926] [2024-06-27 19:22:52,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:52,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:22:52,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:52,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:22:52,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:22:52,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:52,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 459 transitions, 5851 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:52,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:52,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:52,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:53,881 INFO L124 PetriNetUnfolderBase]: 3188/5311 cut-off events. [2024-06-27 19:22:53,881 INFO L125 PetriNetUnfolderBase]: For 1041438/1041450 co-relation queries the response was YES. [2024-06-27 19:22:53,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47627 conditions, 5311 events. 3188/5311 cut-off events. For 1041438/1041450 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 35271 event pairs, 757 based on Foata normal form. 18/5326 useless extension candidates. Maximal degree in co-relation 47436. Up to 4674 conditions per place. [2024-06-27 19:22:53,954 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 415 selfloop transitions, 63 changer transitions 0/485 dead transitions. [2024-06-27 19:22:53,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 485 transitions, 7169 flow [2024-06-27 19:22:53,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:22:53,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:22:53,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-27 19:22:53,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-27 19:22:53,954 INFO L175 Difference]: Start difference. First operand has 426 places, 459 transitions, 5851 flow. Second operand 8 states and 188 transitions. [2024-06-27 19:22:53,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 485 transitions, 7169 flow [2024-06-27 19:22:58,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 485 transitions, 6928 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-27 19:22:58,485 INFO L231 Difference]: Finished difference. Result has 425 places, 459 transitions, 5742 flow [2024-06-27 19:22:58,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5610, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5742, PETRI_PLACES=425, PETRI_TRANSITIONS=459} [2024-06-27 19:22:58,485 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 384 predicate places. [2024-06-27 19:22:58,485 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 459 transitions, 5742 flow [2024-06-27 19:22:58,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:58,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:58,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:58,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 19:22:58,486 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)] === [2024-06-27 19:22:58,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:58,486 INFO L85 PathProgramCache]: Analyzing trace with hash 566580690, now seen corresponding path program 20 times [2024-06-27 19:22:58,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:58,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591178321] [2024-06-27 19:22:58,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:58,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:58,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:58,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:58,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:58,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591178321] [2024-06-27 19:22:58,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591178321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:58,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:58,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:22:58,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827023249] [2024-06-27 19:22:58,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:58,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:22:58,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:58,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:22:58,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:22:58,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:58,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 459 transitions, 5742 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:58,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:58,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:58,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:59,727 INFO L124 PetriNetUnfolderBase]: 3175/5294 cut-off events. [2024-06-27 19:22:59,727 INFO L125 PetriNetUnfolderBase]: For 1013312/1013324 co-relation queries the response was YES. [2024-06-27 19:22:59,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46540 conditions, 5294 events. 3175/5294 cut-off events. For 1013312/1013324 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 35179 event pairs, 778 based on Foata normal form. 18/5307 useless extension candidates. Maximal degree in co-relation 46349. Up to 4742 conditions per place. [2024-06-27 19:22:59,799 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 438 selfloop transitions, 40 changer transitions 0/485 dead transitions. [2024-06-27 19:22:59,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 485 transitions, 7054 flow [2024-06-27 19:22:59,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:22:59,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:22:59,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 19:22:59,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-27 19:22:59,800 INFO L175 Difference]: Start difference. First operand has 425 places, 459 transitions, 5742 flow. Second operand 8 states and 183 transitions. [2024-06-27 19:22:59,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 485 transitions, 7054 flow [2024-06-27 19:23:04,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 485 transitions, 6879 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 19:23:04,793 INFO L231 Difference]: Finished difference. Result has 425 places, 459 transitions, 5651 flow [2024-06-27 19:23:04,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5567, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5651, PETRI_PLACES=425, PETRI_TRANSITIONS=459} [2024-06-27 19:23:04,794 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 384 predicate places. [2024-06-27 19:23:04,794 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 459 transitions, 5651 flow [2024-06-27 19:23:04,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:04,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:04,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:04,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 19:23:04,794 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)] === [2024-06-27 19:23:04,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:04,794 INFO L85 PathProgramCache]: Analyzing trace with hash 308302206, now seen corresponding path program 15 times [2024-06-27 19:23:04,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:04,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085396734] [2024-06-27 19:23:04,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:04,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:04,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:04,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:23:04,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:04,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085396734] [2024-06-27 19:23:04,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085396734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:04,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:04,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:23:04,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015050906] [2024-06-27 19:23:04,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:04,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:23:04,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:04,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:23:04,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:23:04,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:04,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 459 transitions, 5651 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:04,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:04,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:04,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:06,012 INFO L124 PetriNetUnfolderBase]: 3157/5268 cut-off events. [2024-06-27 19:23:06,013 INFO L125 PetriNetUnfolderBase]: For 983202/983214 co-relation queries the response was YES. [2024-06-27 19:23:06,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45397 conditions, 5268 events. 3157/5268 cut-off events. For 983202/983214 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 34994 event pairs, 768 based on Foata normal form. 20/5287 useless extension candidates. Maximal degree in co-relation 45205. Up to 4707 conditions per place. [2024-06-27 19:23:06,084 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 415 selfloop transitions, 59 changer transitions 0/481 dead transitions. [2024-06-27 19:23:06,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 481 transitions, 6695 flow [2024-06-27 19:23:06,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:23:06,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:23:06,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-27 19:23:06,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 19:23:06,085 INFO L175 Difference]: Start difference. First operand has 425 places, 459 transitions, 5651 flow. Second operand 8 states and 184 transitions. [2024-06-27 19:23:06,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 481 transitions, 6695 flow [2024-06-27 19:23:11,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 481 transitions, 6591 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 19:23:11,305 INFO L231 Difference]: Finished difference. Result has 427 places, 459 transitions, 5673 flow [2024-06-27 19:23:11,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5547, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5673, PETRI_PLACES=427, PETRI_TRANSITIONS=459} [2024-06-27 19:23:11,306 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 386 predicate places. [2024-06-27 19:23:11,306 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 459 transitions, 5673 flow [2024-06-27 19:23:11,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:11,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:11,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:11,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 19:23:11,306 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)] === [2024-06-27 19:23:11,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:11,306 INFO L85 PathProgramCache]: Analyzing trace with hash 566728560, now seen corresponding path program 21 times [2024-06-27 19:23:11,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:11,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453478823] [2024-06-27 19:23:11,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:11,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:11,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:11,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:23:11,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:11,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453478823] [2024-06-27 19:23:11,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453478823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:11,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:11,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:23:11,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721406834] [2024-06-27 19:23:11,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:11,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:23:11,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:11,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:23:11,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:23:11,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:11,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 459 transitions, 5673 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:11,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:11,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:11,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:12,553 INFO L124 PetriNetUnfolderBase]: 3139/5242 cut-off events. [2024-06-27 19:23:12,554 INFO L125 PetriNetUnfolderBase]: For 939876/939888 co-relation queries the response was YES. [2024-06-27 19:23:12,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44346 conditions, 5242 events. 3139/5242 cut-off events. For 939876/939888 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 34829 event pairs, 772 based on Foata normal form. 20/5261 useless extension candidates. Maximal degree in co-relation 44153. Up to 4744 conditions per place. [2024-06-27 19:23:12,625 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 438 selfloop transitions, 35 changer transitions 0/480 dead transitions. [2024-06-27 19:23:12,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 480 transitions, 6709 flow [2024-06-27 19:23:12,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:23:12,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:23:12,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-27 19:23:12,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 19:23:12,626 INFO L175 Difference]: Start difference. First operand has 427 places, 459 transitions, 5673 flow. Second operand 7 states and 161 transitions. [2024-06-27 19:23:12,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 480 transitions, 6709 flow [2024-06-27 19:23:18,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 480 transitions, 6580 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 19:23:18,083 INFO L231 Difference]: Finished difference. Result has 427 places, 459 transitions, 5619 flow [2024-06-27 19:23:18,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5544, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5619, PETRI_PLACES=427, PETRI_TRANSITIONS=459} [2024-06-27 19:23:18,083 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 386 predicate places. [2024-06-27 19:23:18,083 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 459 transitions, 5619 flow [2024-06-27 19:23:18,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:18,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:18,084 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] [2024-06-27 19:23:18,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 19:23:18,084 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)] === [2024-06-27 19:23:18,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:18,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1022689686, now seen corresponding path program 16 times [2024-06-27 19:23:18,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:18,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294873556] [2024-06-27 19:23:18,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:18,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:18,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:23:18,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:18,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294873556] [2024-06-27 19:23:18,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294873556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:18,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:18,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:23:18,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763718144] [2024-06-27 19:23:18,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:18,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:23:18,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:18,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:23:18,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:23:18,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:18,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 459 transitions, 5619 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:18,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:18,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:18,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:19,392 INFO L124 PetriNetUnfolderBase]: 3167/5294 cut-off events. [2024-06-27 19:23:19,392 INFO L125 PetriNetUnfolderBase]: For 955129/955141 co-relation queries the response was YES. [2024-06-27 19:23:19,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44779 conditions, 5294 events. 3167/5294 cut-off events. For 955129/955141 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 35256 event pairs, 756 based on Foata normal form. 20/5313 useless extension candidates. Maximal degree in co-relation 44585. Up to 4661 conditions per place. [2024-06-27 19:23:19,453 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 413 selfloop transitions, 61 changer transitions 0/481 dead transitions. [2024-06-27 19:23:19,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 481 transitions, 6690 flow [2024-06-27 19:23:19,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:23:19,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:23:19,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-27 19:23:19,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-27 19:23:19,454 INFO L175 Difference]: Start difference. First operand has 427 places, 459 transitions, 5619 flow. Second operand 7 states and 165 transitions. [2024-06-27 19:23:19,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 481 transitions, 6690 flow [2024-06-27 19:23:25,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 481 transitions, 6621 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 19:23:25,311 INFO L231 Difference]: Finished difference. Result has 429 places, 460 transitions, 5717 flow [2024-06-27 19:23:25,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5550, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5717, PETRI_PLACES=429, PETRI_TRANSITIONS=460} [2024-06-27 19:23:25,312 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 388 predicate places. [2024-06-27 19:23:25,312 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 460 transitions, 5717 flow [2024-06-27 19:23:25,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:25,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:25,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:25,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 19:23:25,312 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)] === [2024-06-27 19:23:25,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:25,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1017506052, now seen corresponding path program 22 times [2024-06-27 19:23:25,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:25,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712853229] [2024-06-27 19:23:25,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:25,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:23:25,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:25,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712853229] [2024-06-27 19:23:25,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712853229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:25,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:25,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:23:25,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937548506] [2024-06-27 19:23:25,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:25,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:23:25,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:25,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:23:25,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:23:25,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:25,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 460 transitions, 5717 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:25,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:25,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:25,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:26,526 INFO L124 PetriNetUnfolderBase]: 3149/5260 cut-off events. [2024-06-27 19:23:26,527 INFO L125 PetriNetUnfolderBase]: For 910055/910067 co-relation queries the response was YES. [2024-06-27 19:23:26,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43908 conditions, 5260 events. 3149/5260 cut-off events. For 910055/910067 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 35020 event pairs, 756 based on Foata normal form. 20/5279 useless extension candidates. Maximal degree in co-relation 43713. Up to 4584 conditions per place. [2024-06-27 19:23:26,599 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 415 selfloop transitions, 68 changer transitions 0/490 dead transitions. [2024-06-27 19:23:26,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 490 transitions, 6797 flow [2024-06-27 19:23:26,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:23:26,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:23:26,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 19:23:26,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-27 19:23:26,600 INFO L175 Difference]: Start difference. First operand has 429 places, 460 transitions, 5717 flow. Second operand 7 states and 174 transitions. [2024-06-27 19:23:26,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 490 transitions, 6797 flow [2024-06-27 19:23:31,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 490 transitions, 6657 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 19:23:31,454 INFO L231 Difference]: Finished difference. Result has 429 places, 460 transitions, 5725 flow [2024-06-27 19:23:31,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5577, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5725, PETRI_PLACES=429, PETRI_TRANSITIONS=460} [2024-06-27 19:23:31,454 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 388 predicate places. [2024-06-27 19:23:31,454 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 460 transitions, 5725 flow [2024-06-27 19:23:31,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:31,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:31,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:31,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 19:23:31,455 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)] === [2024-06-27 19:23:31,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:31,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1011964926, now seen corresponding path program 17 times [2024-06-27 19:23:31,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:31,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825449346] [2024-06-27 19:23:31,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:31,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:31,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:31,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:23:31,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:31,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825449346] [2024-06-27 19:23:31,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825449346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:31,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:31,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:23:31,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210924278] [2024-06-27 19:23:31,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:31,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:23:31,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:31,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:23:31,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:23:31,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:31,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 460 transitions, 5725 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:31,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:31,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:31,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:32,637 INFO L124 PetriNetUnfolderBase]: 3164/5289 cut-off events. [2024-06-27 19:23:32,637 INFO L125 PetriNetUnfolderBase]: For 881490/881502 co-relation queries the response was YES. [2024-06-27 19:23:32,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43664 conditions, 5289 events. 3164/5289 cut-off events. For 881490/881502 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 35265 event pairs, 761 based on Foata normal form. 20/5308 useless extension candidates. Maximal degree in co-relation 43470. Up to 4724 conditions per place. [2024-06-27 19:23:32,709 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 417 selfloop transitions, 59 changer transitions 0/483 dead transitions. [2024-06-27 19:23:32,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 483 transitions, 6804 flow [2024-06-27 19:23:32,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:23:32,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:23:32,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 19:23:32,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-27 19:23:32,710 INFO L175 Difference]: Start difference. First operand has 429 places, 460 transitions, 5725 flow. Second operand 8 states and 183 transitions. [2024-06-27 19:23:32,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 483 transitions, 6804 flow [2024-06-27 19:23:37,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 483 transitions, 6651 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 19:23:37,011 INFO L231 Difference]: Finished difference. Result has 430 places, 461 transitions, 5731 flow [2024-06-27 19:23:37,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5572, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5731, PETRI_PLACES=430, PETRI_TRANSITIONS=461} [2024-06-27 19:23:37,012 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 389 predicate places. [2024-06-27 19:23:37,012 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 461 transitions, 5731 flow [2024-06-27 19:23:37,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:37,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:37,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:37,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 19:23:37,012 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)] === [2024-06-27 19:23:37,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:37,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1022868432, now seen corresponding path program 23 times [2024-06-27 19:23:37,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:37,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106082195] [2024-06-27 19:23:37,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:37,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:37,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:23:37,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:37,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106082195] [2024-06-27 19:23:37,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106082195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:37,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:37,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:23:37,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291248496] [2024-06-27 19:23:37,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:37,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:23:37,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:37,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:23:37,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:23:37,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:37,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 461 transitions, 5731 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:37,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:37,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:37,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:38,257 INFO L124 PetriNetUnfolderBase]: 3146/5263 cut-off events. [2024-06-27 19:23:38,258 INFO L125 PetriNetUnfolderBase]: For 821840/821852 co-relation queries the response was YES. [2024-06-27 19:23:38,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42467 conditions, 5263 events. 3146/5263 cut-off events. For 821840/821852 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 35099 event pairs, 753 based on Foata normal form. 20/5282 useless extension candidates. Maximal degree in co-relation 42273. Up to 4565 conditions per place. [2024-06-27 19:23:38,329 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 419 selfloop transitions, 69 changer transitions 0/495 dead transitions. [2024-06-27 19:23:38,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 495 transitions, 6831 flow [2024-06-27 19:23:38,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:23:38,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:23:38,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 19:23:38,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-27 19:23:38,330 INFO L175 Difference]: Start difference. First operand has 430 places, 461 transitions, 5731 flow. Second operand 8 states and 195 transitions. [2024-06-27 19:23:38,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 495 transitions, 6831 flow [2024-06-27 19:23:43,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 495 transitions, 6696 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 19:23:43,196 INFO L231 Difference]: Finished difference. Result has 431 places, 461 transitions, 5745 flow [2024-06-27 19:23:43,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5596, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5745, PETRI_PLACES=431, PETRI_TRANSITIONS=461} [2024-06-27 19:23:43,196 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 390 predicate places. [2024-06-27 19:23:43,196 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 461 transitions, 5745 flow [2024-06-27 19:23:43,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:43,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:43,197 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] [2024-06-27 19:23:43,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 19:23:43,197 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)] === [2024-06-27 19:23:43,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:43,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1023016116, now seen corresponding path program 18 times [2024-06-27 19:23:43,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:43,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103376269] [2024-06-27 19:23:43,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:43,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:23:43,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:43,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103376269] [2024-06-27 19:23:43,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103376269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:43,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:43,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:23:43,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357301861] [2024-06-27 19:23:43,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:43,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:23:43,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:43,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:23:43,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:23:43,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:43,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 461 transitions, 5745 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:43,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:43,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:43,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:44,447 INFO L124 PetriNetUnfolderBase]: 3133/5244 cut-off events. [2024-06-27 19:23:44,447 INFO L125 PetriNetUnfolderBase]: For 761309/761321 co-relation queries the response was YES. [2024-06-27 19:23:44,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41548 conditions, 5244 events. 3133/5244 cut-off events. For 761309/761321 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 34972 event pairs, 515 based on Foata normal form. 18/5261 useless extension candidates. Maximal degree in co-relation 41354. Up to 4319 conditions per place. [2024-06-27 19:23:44,518 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 402 selfloop transitions, 79 changer transitions 0/488 dead transitions. [2024-06-27 19:23:44,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 488 transitions, 6837 flow [2024-06-27 19:23:44,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:23:44,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:23:44,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 19:23:44,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-27 19:23:44,519 INFO L175 Difference]: Start difference. First operand has 431 places, 461 transitions, 5745 flow. Second operand 7 states and 171 transitions. [2024-06-27 19:23:44,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 488 transitions, 6837 flow [2024-06-27 19:23:48,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 488 transitions, 6676 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 19:23:48,435 INFO L231 Difference]: Finished difference. Result has 429 places, 461 transitions, 5756 flow [2024-06-27 19:23:48,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5584, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5756, PETRI_PLACES=429, PETRI_TRANSITIONS=461} [2024-06-27 19:23:48,436 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 388 predicate places. [2024-06-27 19:23:48,436 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 461 transitions, 5756 flow [2024-06-27 19:23:48,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:48,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:48,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:48,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 19:23:48,437 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)] === [2024-06-27 19:23:48,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:48,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1023016302, now seen corresponding path program 24 times [2024-06-27 19:23:48,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:48,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184842300] [2024-06-27 19:23:48,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:48,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:48,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:48,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:23:48,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:48,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184842300] [2024-06-27 19:23:48,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184842300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:48,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:48,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:23:48,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835959313] [2024-06-27 19:23:48,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:48,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:23:48,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:48,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:23:48,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:23:48,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:48,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 461 transitions, 5756 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:48,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:48,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:48,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:49,587 INFO L124 PetriNetUnfolderBase]: 3120/5225 cut-off events. [2024-06-27 19:23:49,587 INFO L125 PetriNetUnfolderBase]: For 706864/706876 co-relation queries the response was YES. [2024-06-27 19:23:49,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40728 conditions, 5225 events. 3120/5225 cut-off events. For 706864/706876 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 34966 event pairs, 510 based on Foata normal form. 18/5242 useless extension candidates. Maximal degree in co-relation 40535. Up to 4200 conditions per place. [2024-06-27 19:23:49,658 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 405 selfloop transitions, 86 changer transitions 0/498 dead transitions. [2024-06-27 19:23:49,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 498 transitions, 6886 flow [2024-06-27 19:23:49,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:23:49,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:23:49,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:23:49,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-27 19:23:49,659 INFO L175 Difference]: Start difference. First operand has 429 places, 461 transitions, 5756 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:23:49,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 498 transitions, 6886 flow [2024-06-27 19:23:53,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 498 transitions, 6706 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 19:23:53,502 INFO L231 Difference]: Finished difference. Result has 429 places, 461 transitions, 5756 flow [2024-06-27 19:23:53,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5576, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5756, PETRI_PLACES=429, PETRI_TRANSITIONS=461} [2024-06-27 19:23:53,503 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 388 predicate places. [2024-06-27 19:23:53,503 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 461 transitions, 5756 flow [2024-06-27 19:23:53,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:53,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:53,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:53,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-27 19:23:53,504 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)] === [2024-06-27 19:23:53,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:53,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1513914430, now seen corresponding path program 19 times [2024-06-27 19:23:53,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:53,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228459894] [2024-06-27 19:23:53,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:53,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:53,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:23:53,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:53,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228459894] [2024-06-27 19:23:53,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228459894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:53,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:53,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:23:53,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941150371] [2024-06-27 19:23:53,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:53,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:23:53,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:53,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:23:53,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:23:53,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:53,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 461 transitions, 5756 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:53,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:53,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:53,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:54,639 INFO L124 PetriNetUnfolderBase]: 3148/5266 cut-off events. [2024-06-27 19:23:54,639 INFO L125 PetriNetUnfolderBase]: For 700484/700492 co-relation queries the response was YES. [2024-06-27 19:23:54,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40846 conditions, 5266 events. 3148/5266 cut-off events. For 700484/700492 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 35179 event pairs, 777 based on Foata normal form. 13/5277 useless extension candidates. Maximal degree in co-relation 40655. Up to 4700 conditions per place. [2024-06-27 19:23:54,712 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 392 selfloop transitions, 78 changer transitions 0/477 dead transitions. [2024-06-27 19:23:54,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 477 transitions, 6805 flow [2024-06-27 19:23:54,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:23:54,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:23:54,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-27 19:23:54,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-27 19:23:54,713 INFO L175 Difference]: Start difference. First operand has 429 places, 461 transitions, 5756 flow. Second operand 7 states and 157 transitions. [2024-06-27 19:23:54,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 477 transitions, 6805 flow [2024-06-27 19:23:58,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 477 transitions, 6621 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 19:23:58,212 INFO L231 Difference]: Finished difference. Result has 427 places, 462 transitions, 5766 flow [2024-06-27 19:23:58,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5572, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5766, PETRI_PLACES=427, PETRI_TRANSITIONS=462} [2024-06-27 19:23:58,212 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 386 predicate places. [2024-06-27 19:23:58,212 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 462 transitions, 5766 flow [2024-06-27 19:23:58,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:58,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:58,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:58,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-27 19:23:58,213 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)] === [2024-06-27 19:23:58,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:58,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1061636138, now seen corresponding path program 20 times [2024-06-27 19:23:58,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:58,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292905864] [2024-06-27 19:23:58,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:58,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:58,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:58,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:23:58,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:58,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292905864] [2024-06-27 19:23:58,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292905864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:58,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:58,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:23:58,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238162627] [2024-06-27 19:23:58,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:58,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:23:58,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:58,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:23:58,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:23:58,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:58,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 462 transitions, 5766 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:58,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:58,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:58,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:59,378 INFO L124 PetriNetUnfolderBase]: 3209/5368 cut-off events. [2024-06-27 19:23:59,378 INFO L125 PetriNetUnfolderBase]: For 732359/732371 co-relation queries the response was YES. [2024-06-27 19:23:59,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42121 conditions, 5368 events. 3209/5368 cut-off events. For 732359/732371 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 35842 event pairs, 752 based on Foata normal form. 20/5387 useless extension candidates. Maximal degree in co-relation 41931. Up to 4461 conditions per place. [2024-06-27 19:23:59,447 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 395 selfloop transitions, 90 changer transitions 0/492 dead transitions. [2024-06-27 19:23:59,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 492 transitions, 7186 flow [2024-06-27 19:23:59,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:23:59,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:23:59,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-27 19:23:59,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-27 19:23:59,448 INFO L175 Difference]: Start difference. First operand has 427 places, 462 transitions, 5766 flow. Second operand 9 states and 204 transitions. [2024-06-27 19:23:59,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 492 transitions, 7186 flow [2024-06-27 19:24:03,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 492 transitions, 7019 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 19:24:03,353 INFO L231 Difference]: Finished difference. Result has 432 places, 464 transitions, 5877 flow [2024-06-27 19:24:03,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5599, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5877, PETRI_PLACES=432, PETRI_TRANSITIONS=464} [2024-06-27 19:24:03,353 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 391 predicate places. [2024-06-27 19:24:03,353 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 464 transitions, 5877 flow [2024-06-27 19:24:03,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:03,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:03,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:03,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-27 19:24:03,354 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)] === [2024-06-27 19:24:03,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:03,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1516771390, now seen corresponding path program 21 times [2024-06-27 19:24:03,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:03,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901648656] [2024-06-27 19:24:03,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:03,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:03,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:03,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:24:03,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:03,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901648656] [2024-06-27 19:24:03,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901648656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:03,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:03,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:24:03,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295023308] [2024-06-27 19:24:03,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:03,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:24:03,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:03,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:24:03,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:24:03,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:03,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 464 transitions, 5877 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:03,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:03,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:03,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:04,652 INFO L124 PetriNetUnfolderBase]: 3224/5394 cut-off events. [2024-06-27 19:24:04,652 INFO L125 PetriNetUnfolderBase]: For 732723/732731 co-relation queries the response was YES. [2024-06-27 19:24:04,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42457 conditions, 5394 events. 3224/5394 cut-off events. For 732723/732731 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 36217 event pairs, 795 based on Foata normal form. 13/5405 useless extension candidates. Maximal degree in co-relation 42265. Up to 4712 conditions per place. [2024-06-27 19:24:04,716 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 397 selfloop transitions, 80 changer transitions 0/484 dead transitions. [2024-06-27 19:24:04,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 484 transitions, 6992 flow [2024-06-27 19:24:04,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:24:04,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:24:04,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-27 19:24:04,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-27 19:24:04,717 INFO L175 Difference]: Start difference. First operand has 432 places, 464 transitions, 5877 flow. Second operand 7 states and 160 transitions. [2024-06-27 19:24:04,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 484 transitions, 6992 flow [2024-06-27 19:24:08,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 484 transitions, 6826 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 19:24:08,676 INFO L231 Difference]: Finished difference. Result has 432 places, 465 transitions, 5908 flow [2024-06-27 19:24:08,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5711, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5908, PETRI_PLACES=432, PETRI_TRANSITIONS=465} [2024-06-27 19:24:08,677 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 391 predicate places. [2024-06-27 19:24:08,677 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 465 transitions, 5908 flow [2024-06-27 19:24:08,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:08,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:08,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:08,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-27 19:24:08,677 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)] === [2024-06-27 19:24:08,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:08,677 INFO L85 PathProgramCache]: Analyzing trace with hash 836591948, now seen corresponding path program 22 times [2024-06-27 19:24:08,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:08,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962758667] [2024-06-27 19:24:08,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:08,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:08,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:08,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:24:08,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:08,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962758667] [2024-06-27 19:24:08,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962758667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:08,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:08,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:24:08,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092468828] [2024-06-27 19:24:08,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:08,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:24:08,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:08,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:24:08,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:24:08,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:08,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 465 transitions, 5908 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:08,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:08,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:08,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:09,844 INFO L124 PetriNetUnfolderBase]: 3252/5441 cut-off events. [2024-06-27 19:24:09,844 INFO L125 PetriNetUnfolderBase]: For 733298/733310 co-relation queries the response was YES. [2024-06-27 19:24:09,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42737 conditions, 5441 events. 3252/5441 cut-off events. For 733298/733310 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 36574 event pairs, 793 based on Foata normal form. 20/5460 useless extension candidates. Maximal degree in co-relation 42545. Up to 4800 conditions per place. [2024-06-27 19:24:09,915 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 397 selfloop transitions, 89 changer transitions 0/493 dead transitions. [2024-06-27 19:24:09,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 493 transitions, 7021 flow [2024-06-27 19:24:09,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:24:09,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:24:09,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-27 19:24:09,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5525 [2024-06-27 19:24:09,916 INFO L175 Difference]: Start difference. First operand has 432 places, 465 transitions, 5908 flow. Second operand 10 states and 221 transitions. [2024-06-27 19:24:09,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 493 transitions, 7021 flow [2024-06-27 19:24:14,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 493 transitions, 6849 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 19:24:14,016 INFO L231 Difference]: Finished difference. Result has 437 places, 466 transitions, 5960 flow [2024-06-27 19:24:14,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5736, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5960, PETRI_PLACES=437, PETRI_TRANSITIONS=466} [2024-06-27 19:24:14,016 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 396 predicate places. [2024-06-27 19:24:14,016 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 466 transitions, 5960 flow [2024-06-27 19:24:14,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:14,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:14,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:14,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-27 19:24:14,017 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)] === [2024-06-27 19:24:14,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:14,017 INFO L85 PathProgramCache]: Analyzing trace with hash 836413202, now seen corresponding path program 25 times [2024-06-27 19:24:14,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:14,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073148135] [2024-06-27 19:24:14,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:14,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:14,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:14,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:24:14,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:14,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073148135] [2024-06-27 19:24:14,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073148135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:14,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:14,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:24:14,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362722731] [2024-06-27 19:24:14,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:14,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:24:14,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:14,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:24:14,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:24:14,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:14,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 466 transitions, 5960 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:14,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:14,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:14,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:15,296 INFO L124 PetriNetUnfolderBase]: 3234/5415 cut-off events. [2024-06-27 19:24:15,296 INFO L125 PetriNetUnfolderBase]: For 687566/687578 co-relation queries the response was YES. [2024-06-27 19:24:15,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41686 conditions, 5415 events. 3234/5415 cut-off events. For 687566/687578 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 36539 event pairs, 771 based on Foata normal form. 20/5434 useless extension candidates. Maximal degree in co-relation 41493. Up to 4641 conditions per place. [2024-06-27 19:24:15,371 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 404 selfloop transitions, 93 changer transitions 0/504 dead transitions. [2024-06-27 19:24:15,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 504 transitions, 7088 flow [2024-06-27 19:24:15,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:24:15,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:24:15,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-27 19:24:15,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027777777777777 [2024-06-27 19:24:15,372 INFO L175 Difference]: Start difference. First operand has 437 places, 466 transitions, 5960 flow. Second operand 9 states and 217 transitions. [2024-06-27 19:24:15,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 504 transitions, 7088 flow [2024-06-27 19:24:19,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 504 transitions, 6895 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-27 19:24:19,592 INFO L231 Difference]: Finished difference. Result has 436 places, 466 transitions, 5967 flow [2024-06-27 19:24:19,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5767, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5967, PETRI_PLACES=436, PETRI_TRANSITIONS=466} [2024-06-27 19:24:19,593 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 395 predicate places. [2024-06-27 19:24:19,593 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 466 transitions, 5967 flow [2024-06-27 19:24:19,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:19,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:19,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:19,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-27 19:24:19,593 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)] === [2024-06-27 19:24:19,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:19,594 INFO L85 PathProgramCache]: Analyzing trace with hash 749573708, now seen corresponding path program 23 times [2024-06-27 19:24:19,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:19,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65704799] [2024-06-27 19:24:19,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:19,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:19,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:19,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:24:19,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:19,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65704799] [2024-06-27 19:24:19,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65704799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:19,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:19,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:24:19,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450123792] [2024-06-27 19:24:19,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:19,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:24:19,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:19,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:24:19,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:24:19,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:19,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 466 transitions, 5967 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:19,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:19,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:19,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:20,812 INFO L124 PetriNetUnfolderBase]: 3221/5383 cut-off events. [2024-06-27 19:24:20,812 INFO L125 PetriNetUnfolderBase]: For 619062/619074 co-relation queries the response was YES. [2024-06-27 19:24:20,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40715 conditions, 5383 events. 3221/5383 cut-off events. For 619062/619074 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 36132 event pairs, 741 based on Foata normal form. 18/5387 useless extension candidates. Maximal degree in co-relation 40523. Up to 4501 conditions per place. [2024-06-27 19:24:20,883 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 388 selfloop transitions, 105 changer transitions 0/500 dead transitions. [2024-06-27 19:24:20,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 500 transitions, 7337 flow [2024-06-27 19:24:20,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:24:20,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:24:20,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-27 19:24:20,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.57 [2024-06-27 19:24:20,883 INFO L175 Difference]: Start difference. First operand has 436 places, 466 transitions, 5967 flow. Second operand 10 states and 228 transitions. [2024-06-27 19:24:20,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 500 transitions, 7337 flow [2024-06-27 19:24:23,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 500 transitions, 7125 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-27 19:24:23,891 INFO L231 Difference]: Finished difference. Result has 435 places, 466 transitions, 5981 flow [2024-06-27 19:24:23,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5761, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5981, PETRI_PLACES=435, PETRI_TRANSITIONS=466} [2024-06-27 19:24:23,892 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 394 predicate places. [2024-06-27 19:24:23,892 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 466 transitions, 5981 flow [2024-06-27 19:24:23,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:23,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:23,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:23,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-27 19:24:23,892 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)] === [2024-06-27 19:24:23,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:23,893 INFO L85 PathProgramCache]: Analyzing trace with hash 836265332, now seen corresponding path program 26 times [2024-06-27 19:24:23,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:23,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383362144] [2024-06-27 19:24:23,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:23,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:23,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:24,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:24:24,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:24,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383362144] [2024-06-27 19:24:24,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383362144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:24,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:24,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:24:24,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948745512] [2024-06-27 19:24:24,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:24,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:24:24,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:24,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:24:24,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:24:24,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:24,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 466 transitions, 5981 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:24,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:24,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:24,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:25,090 INFO L124 PetriNetUnfolderBase]: 3208/5371 cut-off events. [2024-06-27 19:24:25,090 INFO L125 PetriNetUnfolderBase]: For 561990/562002 co-relation queries the response was YES. [2024-06-27 19:24:25,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39825 conditions, 5371 events. 3208/5371 cut-off events. For 561990/562002 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 36214 event pairs, 706 based on Foata normal form. 18/5382 useless extension candidates. Maximal degree in co-relation 39635. Up to 4426 conditions per place. [2024-06-27 19:24:25,164 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 399 selfloop transitions, 105 changer transitions 0/511 dead transitions. [2024-06-27 19:24:25,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 511 transitions, 7157 flow [2024-06-27 19:24:25,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:24:25,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:24:25,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-27 19:24:25,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6025 [2024-06-27 19:24:25,164 INFO L175 Difference]: Start difference. First operand has 435 places, 466 transitions, 5981 flow. Second operand 10 states and 241 transitions. [2024-06-27 19:24:25,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 511 transitions, 7157 flow [2024-06-27 19:24:28,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 511 transitions, 6925 flow, removed 14 selfloop flow, removed 11 redundant places. [2024-06-27 19:24:28,703 INFO L231 Difference]: Finished difference. Result has 434 places, 466 transitions, 5969 flow [2024-06-27 19:24:28,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5749, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5969, PETRI_PLACES=434, PETRI_TRANSITIONS=466} [2024-06-27 19:24:28,703 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 393 predicate places. [2024-06-27 19:24:28,703 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 466 transitions, 5969 flow [2024-06-27 19:24:28,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:28,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:28,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:28,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-27 19:24:28,704 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)] === [2024-06-27 19:24:28,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:28,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1064493098, now seen corresponding path program 24 times [2024-06-27 19:24:28,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:28,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70420330] [2024-06-27 19:24:28,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:28,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:28,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:28,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:24:28,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:28,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70420330] [2024-06-27 19:24:28,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70420330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:28,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:28,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:24:28,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627762346] [2024-06-27 19:24:28,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:28,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:24:28,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:28,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:24:28,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:24:28,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:28,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 466 transitions, 5969 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:28,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:28,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:28,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:29,881 INFO L124 PetriNetUnfolderBase]: 3190/5351 cut-off events. [2024-06-27 19:24:29,881 INFO L125 PetriNetUnfolderBase]: For 503033/503045 co-relation queries the response was YES. [2024-06-27 19:24:29,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38336 conditions, 5351 events. 3190/5351 cut-off events. For 503033/503045 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 36071 event pairs, 763 based on Foata normal form. 20/5370 useless extension candidates. Maximal degree in co-relation 38149. Up to 4742 conditions per place. [2024-06-27 19:24:29,952 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 398 selfloop transitions, 84 changer transitions 0/489 dead transitions. [2024-06-27 19:24:29,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 489 transitions, 7031 flow [2024-06-27 19:24:29,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:24:29,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:24:29,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-27 19:24:29,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-27 19:24:29,952 INFO L175 Difference]: Start difference. First operand has 434 places, 466 transitions, 5969 flow. Second operand 9 states and 200 transitions. [2024-06-27 19:24:29,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 489 transitions, 7031 flow [2024-06-27 19:24:32,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 489 transitions, 6791 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-27 19:24:32,980 INFO L231 Difference]: Finished difference. Result has 431 places, 466 transitions, 5905 flow [2024-06-27 19:24:32,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5729, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5905, PETRI_PLACES=431, PETRI_TRANSITIONS=466} [2024-06-27 19:24:32,980 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 390 predicate places. [2024-06-27 19:24:32,980 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 466 transitions, 5905 flow [2024-06-27 19:24:32,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:32,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:32,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:32,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-27 19:24:32,981 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)] === [2024-06-27 19:24:32,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:32,981 INFO L85 PathProgramCache]: Analyzing trace with hash 747699758, now seen corresponding path program 25 times [2024-06-27 19:24:32,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:32,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278125915] [2024-06-27 19:24:32,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:32,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:32,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:33,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:24:33,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:33,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278125915] [2024-06-27 19:24:33,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278125915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:33,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:33,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:24:33,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693049025] [2024-06-27 19:24:33,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:33,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:24:33,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:33,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:24:33,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:24:33,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:33,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 466 transitions, 5905 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:33,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:33,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:33,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:34,203 INFO L124 PetriNetUnfolderBase]: 3210/5383 cut-off events. [2024-06-27 19:24:34,203 INFO L125 PetriNetUnfolderBase]: For 474384/474396 co-relation queries the response was YES. [2024-06-27 19:24:34,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38204 conditions, 5383 events. 3210/5383 cut-off events. For 474384/474396 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 36148 event pairs, 484 based on Foata normal form. 18/5400 useless extension candidates. Maximal degree in co-relation 38019. Up to 3690 conditions per place. [2024-06-27 19:24:34,271 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 363 selfloop transitions, 134 changer transitions 0/504 dead transitions. [2024-06-27 19:24:34,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 504 transitions, 7354 flow [2024-06-27 19:24:34,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:24:34,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:24:34,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-27 19:24:34,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5944444444444444 [2024-06-27 19:24:34,272 INFO L175 Difference]: Start difference. First operand has 431 places, 466 transitions, 5905 flow. Second operand 9 states and 214 transitions. [2024-06-27 19:24:34,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 504 transitions, 7354 flow [2024-06-27 19:24:37,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 504 transitions, 7119 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-27 19:24:37,192 INFO L231 Difference]: Finished difference. Result has 429 places, 467 transitions, 5983 flow [2024-06-27 19:24:37,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5672, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5983, PETRI_PLACES=429, PETRI_TRANSITIONS=467} [2024-06-27 19:24:37,193 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 388 predicate places. [2024-06-27 19:24:37,193 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 467 transitions, 5983 flow [2024-06-27 19:24:37,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:37,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:37,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:37,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-27 19:24:37,194 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)] === [2024-06-27 19:24:37,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:37,194 INFO L85 PathProgramCache]: Analyzing trace with hash 747699572, now seen corresponding path program 27 times [2024-06-27 19:24:37,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:37,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958056933] [2024-06-27 19:24:37,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:37,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:37,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:24:37,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:37,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958056933] [2024-06-27 19:24:37,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958056933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:37,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:37,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:24:37,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219473070] [2024-06-27 19:24:37,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:37,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:24:37,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:37,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:24:37,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:24:37,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:37,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 467 transitions, 5983 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:37,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:37,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:37,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:38,393 INFO L124 PetriNetUnfolderBase]: 3197/5364 cut-off events. [2024-06-27 19:24:38,393 INFO L125 PetriNetUnfolderBase]: For 438093/438105 co-relation queries the response was YES. [2024-06-27 19:24:38,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37854 conditions, 5364 events. 3197/5364 cut-off events. For 438093/438105 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 36115 event pairs, 460 based on Foata normal form. 18/5381 useless extension candidates. Maximal degree in co-relation 37670. Up to 3774 conditions per place. [2024-06-27 19:24:38,461 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 378 selfloop transitions, 124 changer transitions 0/509 dead transitions. [2024-06-27 19:24:38,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 509 transitions, 7147 flow [2024-06-27 19:24:38,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:24:38,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:24:38,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-27 19:24:38,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-27 19:24:38,461 INFO L175 Difference]: Start difference. First operand has 429 places, 467 transitions, 5983 flow. Second operand 9 states and 220 transitions. [2024-06-27 19:24:38,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 509 transitions, 7147 flow [2024-06-27 19:24:41,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 509 transitions, 6878 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-27 19:24:41,081 INFO L231 Difference]: Finished difference. Result has 429 places, 467 transitions, 5970 flow [2024-06-27 19:24:41,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5714, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5970, PETRI_PLACES=429, PETRI_TRANSITIONS=467} [2024-06-27 19:24:41,081 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 388 predicate places. [2024-06-27 19:24:41,081 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 467 transitions, 5970 flow [2024-06-27 19:24:41,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:41,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:41,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:41,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-27 19:24:41,082 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)] === [2024-06-27 19:24:41,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:41,082 INFO L85 PathProgramCache]: Analyzing trace with hash 2128502784, now seen corresponding path program 26 times [2024-06-27 19:24:41,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:41,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51566138] [2024-06-27 19:24:41,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:41,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:41,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:41,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:24:41,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:41,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51566138] [2024-06-27 19:24:41,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51566138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:41,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:41,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:24:41,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31743230] [2024-06-27 19:24:41,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:41,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:24:41,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:41,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:24:41,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:24:41,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:41,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 467 transitions, 5970 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:41,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:41,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:41,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:42,197 INFO L124 PetriNetUnfolderBase]: 3184/5345 cut-off events. [2024-06-27 19:24:42,197 INFO L125 PetriNetUnfolderBase]: For 385350/385362 co-relation queries the response was YES. [2024-06-27 19:24:42,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36759 conditions, 5345 events. 3184/5345 cut-off events. For 385350/385362 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 35937 event pairs, 481 based on Foata normal form. 18/5362 useless extension candidates. Maximal degree in co-relation 36577. Up to 3665 conditions per place. [2024-06-27 19:24:42,263 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 355 selfloop transitions, 137 changer transitions 0/499 dead transitions. [2024-06-27 19:24:42,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 499 transitions, 7116 flow [2024-06-27 19:24:42,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:24:42,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:24:42,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-27 19:24:42,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-06-27 19:24:42,264 INFO L175 Difference]: Start difference. First operand has 429 places, 467 transitions, 5970 flow. Second operand 9 states and 208 transitions. [2024-06-27 19:24:42,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 499 transitions, 7116 flow [2024-06-27 19:24:44,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 499 transitions, 6810 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-27 19:24:44,702 INFO L231 Difference]: Finished difference. Result has 428 places, 467 transitions, 5946 flow [2024-06-27 19:24:44,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5664, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5946, PETRI_PLACES=428, PETRI_TRANSITIONS=467} [2024-06-27 19:24:44,703 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 387 predicate places. [2024-06-27 19:24:44,703 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 467 transitions, 5946 flow [2024-06-27 19:24:44,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:44,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:44,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:44,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-27 19:24:44,703 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)] === [2024-06-27 19:24:44,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:44,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1507955516, now seen corresponding path program 1 times [2024-06-27 19:24:44,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:44,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915196189] [2024-06-27 19:24:44,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:44,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:44,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:44,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:24:44,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:44,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915196189] [2024-06-27 19:24:44,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915196189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:44,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:44,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:24:44,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528674305] [2024-06-27 19:24:44,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:44,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:24:44,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:44,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:24:44,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:24:44,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:44,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 467 transitions, 5946 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:44,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:44,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:44,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:45,910 INFO L124 PetriNetUnfolderBase]: 3204/5381 cut-off events. [2024-06-27 19:24:45,911 INFO L125 PetriNetUnfolderBase]: For 380556/380568 co-relation queries the response was YES. [2024-06-27 19:24:45,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36962 conditions, 5381 events. 3204/5381 cut-off events. For 380556/380568 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 36360 event pairs, 704 based on Foata normal form. 18/5398 useless extension candidates. Maximal degree in co-relation 36780. Up to 4077 conditions per place. [2024-06-27 19:24:45,974 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 408 selfloop transitions, 95 changer transitions 0/510 dead transitions. [2024-06-27 19:24:45,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 510 transitions, 7376 flow [2024-06-27 19:24:45,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:24:45,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:24:45,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-27 19:24:45,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055555555555555 [2024-06-27 19:24:45,975 INFO L175 Difference]: Start difference. First operand has 428 places, 467 transitions, 5946 flow. Second operand 9 states and 218 transitions. [2024-06-27 19:24:45,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 510 transitions, 7376 flow [2024-06-27 19:24:48,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 510 transitions, 7063 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-27 19:24:48,370 INFO L231 Difference]: Finished difference. Result has 427 places, 468 transitions, 5851 flow [2024-06-27 19:24:48,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5637, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5851, PETRI_PLACES=427, PETRI_TRANSITIONS=468} [2024-06-27 19:24:48,370 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 386 predicate places. [2024-06-27 19:24:48,370 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 468 transitions, 5851 flow [2024-06-27 19:24:48,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:48,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:48,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:48,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-27 19:24:48,370 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)] === [2024-06-27 19:24:48,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:48,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1508254418, now seen corresponding path program 1 times [2024-06-27 19:24:48,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:48,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928373275] [2024-06-27 19:24:48,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:48,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:48,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:48,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:24:48,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:48,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928373275] [2024-06-27 19:24:48,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928373275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:48,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:48,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:24:48,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263317537] [2024-06-27 19:24:48,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:48,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:24:48,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:48,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:24:48,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:24:48,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:48,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 468 transitions, 5851 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:48,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:48,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:48,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:49,503 INFO L124 PetriNetUnfolderBase]: 3311/5558 cut-off events. [2024-06-27 19:24:49,503 INFO L125 PetriNetUnfolderBase]: For 421210/421222 co-relation queries the response was YES. [2024-06-27 19:24:49,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38423 conditions, 5558 events. 3311/5558 cut-off events. For 421210/421222 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 37693 event pairs, 742 based on Foata normal form. 18/5575 useless extension candidates. Maximal degree in co-relation 38242. Up to 4675 conditions per place. [2024-06-27 19:24:49,573 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 418 selfloop transitions, 81 changer transitions 0/506 dead transitions. [2024-06-27 19:24:49,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 506 transitions, 7312 flow [2024-06-27 19:24:49,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:24:49,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:24:49,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-27 19:24:49,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5722222222222222 [2024-06-27 19:24:49,574 INFO L175 Difference]: Start difference. First operand has 427 places, 468 transitions, 5851 flow. Second operand 9 states and 206 transitions. [2024-06-27 19:24:49,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 506 transitions, 7312 flow [2024-06-27 19:24:51,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 506 transitions, 7023 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 19:24:51,922 INFO L231 Difference]: Finished difference. Result has 431 places, 476 transitions, 5890 flow [2024-06-27 19:24:51,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5572, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5890, PETRI_PLACES=431, PETRI_TRANSITIONS=476} [2024-06-27 19:24:51,922 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 390 predicate places. [2024-06-27 19:24:51,922 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 476 transitions, 5890 flow [2024-06-27 19:24:51,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:51,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:51,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:51,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-27 19:24:51,923 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)] === [2024-06-27 19:24:51,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:51,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1508254046, now seen corresponding path program 2 times [2024-06-27 19:24:51,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:51,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724310440] [2024-06-27 19:24:51,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:51,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:52,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:24:52,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:52,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724310440] [2024-06-27 19:24:52,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724310440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:52,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:52,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:24:52,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692202616] [2024-06-27 19:24:52,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:52,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:24:52,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:52,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:24:52,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:24:52,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:52,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 476 transitions, 5890 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:52,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:52,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:52,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:53,114 INFO L124 PetriNetUnfolderBase]: 3331/5592 cut-off events. [2024-06-27 19:24:53,114 INFO L125 PetriNetUnfolderBase]: For 428126/428138 co-relation queries the response was YES. [2024-06-27 19:24:53,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38159 conditions, 5592 events. 3331/5592 cut-off events. For 428126/428138 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 38019 event pairs, 717 based on Foata normal form. 18/5609 useless extension candidates. Maximal degree in co-relation 37976. Up to 4203 conditions per place. [2024-06-27 19:24:53,185 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 410 selfloop transitions, 100 changer transitions 0/517 dead transitions. [2024-06-27 19:24:53,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 517 transitions, 7339 flow [2024-06-27 19:24:53,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:24:53,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:24:53,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-27 19:24:53,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027777777777777 [2024-06-27 19:24:53,186 INFO L175 Difference]: Start difference. First operand has 431 places, 476 transitions, 5890 flow. Second operand 9 states and 217 transitions. [2024-06-27 19:24:53,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 517 transitions, 7339 flow [2024-06-27 19:24:55,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 517 transitions, 7183 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 19:24:55,620 INFO L231 Difference]: Finished difference. Result has 434 places, 477 transitions, 5954 flow [2024-06-27 19:24:55,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5736, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5954, PETRI_PLACES=434, PETRI_TRANSITIONS=477} [2024-06-27 19:24:55,620 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 393 predicate places. [2024-06-27 19:24:55,620 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 477 transitions, 5954 flow [2024-06-27 19:24:55,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:55,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:55,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:55,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-27 19:24:55,620 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)] === [2024-06-27 19:24:55,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:55,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1596968048, now seen corresponding path program 2 times [2024-06-27 19:24:55,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:55,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679327147] [2024-06-27 19:24:55,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:55,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:55,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:24:55,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:55,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679327147] [2024-06-27 19:24:55,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679327147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:55,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:55,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:24:55,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217471573] [2024-06-27 19:24:55,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:55,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:24:55,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:55,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:24:55,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:24:55,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:55,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 477 transitions, 5954 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:55,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:55,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:55,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:56,973 INFO L124 PetriNetUnfolderBase]: 3359/5638 cut-off events. [2024-06-27 19:24:56,973 INFO L125 PetriNetUnfolderBase]: For 441487/441499 co-relation queries the response was YES. [2024-06-27 19:24:57,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38666 conditions, 5638 events. 3359/5638 cut-off events. For 441487/441499 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 38393 event pairs, 812 based on Foata normal form. 20/5657 useless extension candidates. Maximal degree in co-relation 38483. Up to 5032 conditions per place. [2024-06-27 19:24:57,030 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 424 selfloop transitions, 67 changer transitions 0/498 dead transitions. [2024-06-27 19:24:57,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 498 transitions, 7049 flow [2024-06-27 19:24:57,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:24:57,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:24:57,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-27 19:24:57,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527777777777778 [2024-06-27 19:24:57,031 INFO L175 Difference]: Start difference. First operand has 434 places, 477 transitions, 5954 flow. Second operand 9 states and 199 transitions. [2024-06-27 19:24:57,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 498 transitions, 7049 flow [2024-06-27 19:24:59,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 498 transitions, 6893 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 19:24:59,508 INFO L231 Difference]: Finished difference. Result has 437 places, 478 transitions, 5969 flow [2024-06-27 19:24:59,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5798, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5969, PETRI_PLACES=437, PETRI_TRANSITIONS=478} [2024-06-27 19:24:59,508 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 396 predicate places. [2024-06-27 19:24:59,509 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 478 transitions, 5969 flow [2024-06-27 19:24:59,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:59,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:59,509 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] [2024-06-27 19:24:59,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-27 19:24:59,509 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)] === [2024-06-27 19:24:59,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:59,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1510128368, now seen corresponding path program 3 times [2024-06-27 19:24:59,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:59,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514223241] [2024-06-27 19:24:59,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:59,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:59,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:24:59,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:59,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514223241] [2024-06-27 19:24:59,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514223241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:59,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:59,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:24:59,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950048447] [2024-06-27 19:24:59,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:59,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:24:59,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:59,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:24:59,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:24:59,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:59,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 478 transitions, 5969 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:59,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:59,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:59,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:00,713 INFO L124 PetriNetUnfolderBase]: 3379/5668 cut-off events. [2024-06-27 19:25:00,713 INFO L125 PetriNetUnfolderBase]: For 438828/438840 co-relation queries the response was YES. [2024-06-27 19:25:00,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38831 conditions, 5668 events. 3379/5668 cut-off events. For 438828/438840 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 38660 event pairs, 800 based on Foata normal form. 18/5685 useless extension candidates. Maximal degree in co-relation 38647. Up to 5004 conditions per place. [2024-06-27 19:25:00,784 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 424 selfloop transitions, 73 changer transitions 0/504 dead transitions. [2024-06-27 19:25:00,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 504 transitions, 7116 flow [2024-06-27 19:25:00,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:25:00,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:25:00,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 220 transitions. [2024-06-27 19:25:00,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-27 19:25:00,785 INFO L175 Difference]: Start difference. First operand has 437 places, 478 transitions, 5969 flow. Second operand 10 states and 220 transitions. [2024-06-27 19:25:00,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 504 transitions, 7116 flow [2024-06-27 19:25:03,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 504 transitions, 6976 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 19:25:03,282 INFO L231 Difference]: Finished difference. Result has 441 places, 480 transitions, 6034 flow [2024-06-27 19:25:03,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5829, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6034, PETRI_PLACES=441, PETRI_TRANSITIONS=480} [2024-06-27 19:25:03,282 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 400 predicate places. [2024-06-27 19:25:03,282 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 480 transitions, 6034 flow [2024-06-27 19:25:03,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:03,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:03,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:03,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-27 19:25:03,282 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)] === [2024-06-27 19:25:03,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:03,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1596819806, now seen corresponding path program 3 times [2024-06-27 19:25:03,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:03,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413715689] [2024-06-27 19:25:03,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:03,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:03,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:03,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:03,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:03,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413715689] [2024-06-27 19:25:03,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413715689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:03,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:03,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:25:03,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600777106] [2024-06-27 19:25:03,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:03,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:25:03,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:03,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:25:03,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:25:03,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:03,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 480 transitions, 6034 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:03,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:03,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:03,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:04,574 INFO L124 PetriNetUnfolderBase]: 3399/5702 cut-off events. [2024-06-27 19:25:04,574 INFO L125 PetriNetUnfolderBase]: For 445513/445525 co-relation queries the response was YES. [2024-06-27 19:25:04,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39111 conditions, 5702 events. 3399/5702 cut-off events. For 445513/445525 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 38918 event pairs, 812 based on Foata normal form. 18/5715 useless extension candidates. Maximal degree in co-relation 38925. Up to 4967 conditions per place. [2024-06-27 19:25:04,649 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 418 selfloop transitions, 89 changer transitions 0/514 dead transitions. [2024-06-27 19:25:04,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 514 transitions, 7202 flow [2024-06-27 19:25:04,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:25:04,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:25:04,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-27 19:25:04,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5675 [2024-06-27 19:25:04,650 INFO L175 Difference]: Start difference. First operand has 441 places, 480 transitions, 6034 flow. Second operand 10 states and 227 transitions. [2024-06-27 19:25:04,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 514 transitions, 7202 flow [2024-06-27 19:25:06,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 514 transitions, 7048 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-27 19:25:06,987 INFO L231 Difference]: Finished difference. Result has 443 places, 481 transitions, 6079 flow [2024-06-27 19:25:06,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5880, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6079, PETRI_PLACES=443, PETRI_TRANSITIONS=481} [2024-06-27 19:25:06,987 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 402 predicate places. [2024-06-27 19:25:06,987 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 481 transitions, 6079 flow [2024-06-27 19:25:06,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:06,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:06,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:06,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-27 19:25:06,987 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)] === [2024-06-27 19:25:06,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:06,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1011780228, now seen corresponding path program 4 times [2024-06-27 19:25:06,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:06,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854667431] [2024-06-27 19:25:06,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:06,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:06,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:07,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:07,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:07,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854667431] [2024-06-27 19:25:07,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854667431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:07,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:07,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:25:07,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79301640] [2024-06-27 19:25:07,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:07,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:25:07,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:07,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:25:07,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:25:07,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:07,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 481 transitions, 6079 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:07,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:07,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:07,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:08,314 INFO L124 PetriNetUnfolderBase]: 3427/5750 cut-off events. [2024-06-27 19:25:08,314 INFO L125 PetriNetUnfolderBase]: For 459955/459967 co-relation queries the response was YES. [2024-06-27 19:25:08,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39520 conditions, 5750 events. 3427/5750 cut-off events. For 459955/459967 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 39343 event pairs, 826 based on Foata normal form. 20/5769 useless extension candidates. Maximal degree in co-relation 39334. Up to 5171 conditions per place. [2024-06-27 19:25:08,395 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 446 selfloop transitions, 48 changer transitions 0/501 dead transitions. [2024-06-27 19:25:08,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 501 transitions, 7182 flow [2024-06-27 19:25:08,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:25:08,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:25:08,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-27 19:25:08,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-27 19:25:08,396 INFO L175 Difference]: Start difference. First operand has 443 places, 481 transitions, 6079 flow. Second operand 8 states and 180 transitions. [2024-06-27 19:25:08,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 501 transitions, 7182 flow [2024-06-27 19:25:11,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 501 transitions, 7003 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 19:25:11,494 INFO L231 Difference]: Finished difference. Result has 443 places, 482 transitions, 6037 flow [2024-06-27 19:25:11,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5900, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6037, PETRI_PLACES=443, PETRI_TRANSITIONS=482} [2024-06-27 19:25:11,495 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 402 predicate places. [2024-06-27 19:25:11,495 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 482 transitions, 6037 flow [2024-06-27 19:25:11,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:11,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:11,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:11,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-27 19:25:11,495 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)] === [2024-06-27 19:25:11,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:11,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1017142608, now seen corresponding path program 5 times [2024-06-27 19:25:11,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:11,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125367643] [2024-06-27 19:25:11,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:11,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:11,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:11,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:11,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:11,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125367643] [2024-06-27 19:25:11,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125367643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:11,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:11,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:25:11,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212255931] [2024-06-27 19:25:11,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:11,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:25:11,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:11,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:25:11,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:25:11,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:11,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 482 transitions, 6037 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:11,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:11,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:11,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:12,790 INFO L124 PetriNetUnfolderBase]: 3455/5798 cut-off events. [2024-06-27 19:25:12,790 INFO L125 PetriNetUnfolderBase]: For 467193/467205 co-relation queries the response was YES. [2024-06-27 19:25:12,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39895 conditions, 5798 events. 3455/5798 cut-off events. For 467193/467205 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 39693 event pairs, 832 based on Foata normal form. 20/5817 useless extension candidates. Maximal degree in co-relation 39708. Up to 5215 conditions per place. [2024-06-27 19:25:12,865 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 446 selfloop transitions, 48 changer transitions 0/501 dead transitions. [2024-06-27 19:25:12,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 501 transitions, 7140 flow [2024-06-27 19:25:12,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:12,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:12,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-27 19:25:12,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-27 19:25:12,866 INFO L175 Difference]: Start difference. First operand has 443 places, 482 transitions, 6037 flow. Second operand 7 states and 162 transitions. [2024-06-27 19:25:12,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 501 transitions, 7140 flow [2024-06-27 19:25:15,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 501 transitions, 7034 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 19:25:15,580 INFO L231 Difference]: Finished difference. Result has 444 places, 483 transitions, 6070 flow [2024-06-27 19:25:15,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5931, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6070, PETRI_PLACES=444, PETRI_TRANSITIONS=483} [2024-06-27 19:25:15,580 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 403 predicate places. [2024-06-27 19:25:15,580 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 483 transitions, 6070 flow [2024-06-27 19:25:15,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:15,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:15,580 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] [2024-06-27 19:25:15,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-27 19:25:15,581 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)] === [2024-06-27 19:25:15,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:15,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1017290478, now seen corresponding path program 6 times [2024-06-27 19:25:15,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:15,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753181893] [2024-06-27 19:25:15,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:15,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:15,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:15,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:15,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753181893] [2024-06-27 19:25:15,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753181893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:15,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:15,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:25:15,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804637167] [2024-06-27 19:25:15,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:15,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:25:15,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:15,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:25:15,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:25:15,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:15,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 483 transitions, 6070 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:15,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:15,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:15,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:16,913 INFO L124 PetriNetUnfolderBase]: 3500/5869 cut-off events. [2024-06-27 19:25:16,913 INFO L125 PetriNetUnfolderBase]: For 463259/463271 co-relation queries the response was YES. [2024-06-27 19:25:16,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40412 conditions, 5869 events. 3500/5869 cut-off events. For 463259/463271 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 40220 event pairs, 760 based on Foata normal form. 18/5886 useless extension candidates. Maximal degree in co-relation 40224. Up to 5126 conditions per place. [2024-06-27 19:25:16,989 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 448 selfloop transitions, 57 changer transitions 0/512 dead transitions. [2024-06-27 19:25:16,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 512 transitions, 7280 flow [2024-06-27 19:25:16,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:16,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:16,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 19:25:16,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 19:25:16,990 INFO L175 Difference]: Start difference. First operand has 444 places, 483 transitions, 6070 flow. Second operand 7 states and 168 transitions. [2024-06-27 19:25:16,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 512 transitions, 7280 flow [2024-06-27 19:25:20,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 512 transitions, 7172 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 19:25:20,197 INFO L231 Difference]: Finished difference. Result has 447 places, 488 transitions, 6197 flow [2024-06-27 19:25:20,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5962, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6197, PETRI_PLACES=447, PETRI_TRANSITIONS=488} [2024-06-27 19:25:20,197 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 406 predicate places. [2024-06-27 19:25:20,197 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 488 transitions, 6197 flow [2024-06-27 19:25:20,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:20,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:20,197 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] [2024-06-27 19:25:20,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-27 19:25:20,197 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)] === [2024-06-27 19:25:20,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:20,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1017290850, now seen corresponding path program 4 times [2024-06-27 19:25:20,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:20,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78776087] [2024-06-27 19:25:20,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:20,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:20,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:20,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:20,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:20,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78776087] [2024-06-27 19:25:20,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78776087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:20,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:20,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:25:20,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305585278] [2024-06-27 19:25:20,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:20,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:25:20,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:20,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:25:20,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:25:20,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:20,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 488 transitions, 6197 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:20,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:20,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:20,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:21,736 INFO L124 PetriNetUnfolderBase]: 3487/5852 cut-off events. [2024-06-27 19:25:21,736 INFO L125 PetriNetUnfolderBase]: For 430656/430668 co-relation queries the response was YES. [2024-06-27 19:25:21,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39828 conditions, 5852 events. 3487/5852 cut-off events. For 430656/430668 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 40139 event pairs, 721 based on Foata normal form. 18/5869 useless extension candidates. Maximal degree in co-relation 39638. Up to 4754 conditions per place. [2024-06-27 19:25:21,798 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 432 selfloop transitions, 82 changer transitions 0/521 dead transitions. [2024-06-27 19:25:21,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 521 transitions, 7367 flow [2024-06-27 19:25:21,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:21,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:21,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 19:25:21,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6321428571428571 [2024-06-27 19:25:21,799 INFO L175 Difference]: Start difference. First operand has 447 places, 488 transitions, 6197 flow. Second operand 7 states and 177 transitions. [2024-06-27 19:25:21,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 521 transitions, 7367 flow [2024-06-27 19:25:24,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 521 transitions, 7246 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 19:25:24,490 INFO L231 Difference]: Finished difference. Result has 449 places, 488 transitions, 6250 flow [2024-06-27 19:25:24,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6076, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6250, PETRI_PLACES=449, PETRI_TRANSITIONS=488} [2024-06-27 19:25:24,490 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 408 predicate places. [2024-06-27 19:25:24,490 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 488 transitions, 6250 flow [2024-06-27 19:25:24,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:24,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:24,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:24,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-27 19:25:24,491 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)] === [2024-06-27 19:25:24,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:24,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1011565212, now seen corresponding path program 1 times [2024-06-27 19:25:24,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:24,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572848152] [2024-06-27 19:25:24,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:24,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:24,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:24,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:24,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572848152] [2024-06-27 19:25:24,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572848152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:24,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:24,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:25:24,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423557469] [2024-06-27 19:25:24,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:24,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:25:24,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:24,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:25:24,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:25:24,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:24,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 488 transitions, 6250 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:24,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:24,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:24,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:25,854 INFO L124 PetriNetUnfolderBase]: 3523/5910 cut-off events. [2024-06-27 19:25:25,855 INFO L125 PetriNetUnfolderBase]: For 432370/432382 co-relation queries the response was YES. [2024-06-27 19:25:25,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40146 conditions, 5910 events. 3523/5910 cut-off events. For 432370/432382 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 40509 event pairs, 741 based on Foata normal form. 18/5927 useless extension candidates. Maximal degree in co-relation 39956. Up to 5105 conditions per place. [2024-06-27 19:25:25,945 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 439 selfloop transitions, 72 changer transitions 0/518 dead transitions. [2024-06-27 19:25:25,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 518 transitions, 7450 flow [2024-06-27 19:25:25,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:25:25,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:25:25,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-27 19:25:25,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-27 19:25:25,946 INFO L175 Difference]: Start difference. First operand has 449 places, 488 transitions, 6250 flow. Second operand 8 states and 186 transitions. [2024-06-27 19:25:25,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 518 transitions, 7450 flow [2024-06-27 19:25:28,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 518 transitions, 7221 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 19:25:28,744 INFO L231 Difference]: Finished difference. Result has 450 places, 493 transitions, 6264 flow [2024-06-27 19:25:28,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6021, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6264, PETRI_PLACES=450, PETRI_TRANSITIONS=493} [2024-06-27 19:25:28,744 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 409 predicate places. [2024-06-27 19:25:28,744 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 493 transitions, 6264 flow [2024-06-27 19:25:28,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:28,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:28,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:28,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-27 19:25:28,745 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)] === [2024-06-27 19:25:28,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:28,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1011565026, now seen corresponding path program 1 times [2024-06-27 19:25:28,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:28,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960666851] [2024-06-27 19:25:28,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:28,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:28,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:28,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:28,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960666851] [2024-06-27 19:25:28,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960666851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:28,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:28,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:25:28,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624471063] [2024-06-27 19:25:28,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:28,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:25:28,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:28,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:25:28,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:25:28,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:28,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 493 transitions, 6264 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:28,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:28,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:28,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:30,096 INFO L124 PetriNetUnfolderBase]: 3543/5942 cut-off events. [2024-06-27 19:25:30,097 INFO L125 PetriNetUnfolderBase]: For 425713/425725 co-relation queries the response was YES. [2024-06-27 19:25:30,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40347 conditions, 5942 events. 3543/5942 cut-off events. For 425713/425725 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 40767 event pairs, 800 based on Foata normal form. 18/5959 useless extension candidates. Maximal degree in co-relation 40156. Up to 5195 conditions per place. [2024-06-27 19:25:30,180 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 447 selfloop transitions, 62 changer transitions 0/516 dead transitions. [2024-06-27 19:25:30,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 516 transitions, 7416 flow [2024-06-27 19:25:30,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:25:30,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:25:30,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 19:25:30,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-27 19:25:30,181 INFO L175 Difference]: Start difference. First operand has 450 places, 493 transitions, 6264 flow. Second operand 8 states and 183 transitions. [2024-06-27 19:25:30,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 516 transitions, 7416 flow [2024-06-27 19:25:33,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 516 transitions, 7283 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 19:25:33,026 INFO L231 Difference]: Finished difference. Result has 452 places, 494 transitions, 6291 flow [2024-06-27 19:25:33,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6131, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6291, PETRI_PLACES=452, PETRI_TRANSITIONS=494} [2024-06-27 19:25:33,027 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 411 predicate places. [2024-06-27 19:25:33,027 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 494 transitions, 6291 flow [2024-06-27 19:25:33,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:33,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:33,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:33,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-27 19:25:33,027 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)] === [2024-06-27 19:25:33,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:33,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1132526266, now seen corresponding path program 2 times [2024-06-27 19:25:33,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:33,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187860162] [2024-06-27 19:25:33,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:33,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:33,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:33,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:33,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:33,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187860162] [2024-06-27 19:25:33,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187860162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:33,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:33,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:25:33,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350616461] [2024-06-27 19:25:33,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:33,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:25:33,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:33,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:25:33,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:25:33,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:33,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 494 transitions, 6291 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:33,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:33,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:33,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:34,516 INFO L124 PetriNetUnfolderBase]: 3563/5974 cut-off events. [2024-06-27 19:25:34,516 INFO L125 PetriNetUnfolderBase]: For 426843/426855 co-relation queries the response was YES. [2024-06-27 19:25:34,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40536 conditions, 5974 events. 3563/5974 cut-off events. For 426843/426855 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 40996 event pairs, 804 based on Foata normal form. 18/5991 useless extension candidates. Maximal degree in co-relation 40345. Up to 5423 conditions per place. [2024-06-27 19:25:34,589 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 469 selfloop transitions, 35 changer transitions 0/511 dead transitions. [2024-06-27 19:25:34,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 511 transitions, 7383 flow [2024-06-27 19:25:34,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:34,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:34,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-27 19:25:34,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-27 19:25:34,590 INFO L175 Difference]: Start difference. First operand has 452 places, 494 transitions, 6291 flow. Second operand 7 states and 156 transitions. [2024-06-27 19:25:34,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 511 transitions, 7383 flow [2024-06-27 19:25:37,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 511 transitions, 7242 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 19:25:37,684 INFO L231 Difference]: Finished difference. Result has 452 places, 495 transitions, 6252 flow [2024-06-27 19:25:37,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6150, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6252, PETRI_PLACES=452, PETRI_TRANSITIONS=495} [2024-06-27 19:25:37,684 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 411 predicate places. [2024-06-27 19:25:37,685 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 495 transitions, 6252 flow [2024-06-27 19:25:37,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:37,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:37,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:37,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-27 19:25:37,685 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)] === [2024-06-27 19:25:37,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:37,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1132646236, now seen corresponding path program 3 times [2024-06-27 19:25:37,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:37,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095415948] [2024-06-27 19:25:37,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:37,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:37,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:37,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:37,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:37,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095415948] [2024-06-27 19:25:37,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095415948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:37,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:37,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:25:37,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049331708] [2024-06-27 19:25:37,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:37,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:25:37,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:37,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:25:37,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:25:37,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:37,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 495 transitions, 6252 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:37,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:37,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:37,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:38,996 INFO L124 PetriNetUnfolderBase]: 3583/6003 cut-off events. [2024-06-27 19:25:38,996 INFO L125 PetriNetUnfolderBase]: For 426769/426777 co-relation queries the response was YES. [2024-06-27 19:25:39,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40601 conditions, 6003 events. 3583/6003 cut-off events. For 426769/426777 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 41072 event pairs, 829 based on Foata normal form. 11/6012 useless extension candidates. Maximal degree in co-relation 40410. Up to 4769 conditions per place. [2024-06-27 19:25:39,075 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 410 selfloop transitions, 100 changer transitions 0/517 dead transitions. [2024-06-27 19:25:39,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 517 transitions, 7434 flow [2024-06-27 19:25:39,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:39,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:39,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-27 19:25:39,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-27 19:25:39,075 INFO L175 Difference]: Start difference. First operand has 452 places, 495 transitions, 6252 flow. Second operand 7 states and 162 transitions. [2024-06-27 19:25:39,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 517 transitions, 7434 flow [2024-06-27 19:25:41,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 517 transitions, 7260 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 19:25:41,558 INFO L231 Difference]: Finished difference. Result has 452 places, 496 transitions, 6312 flow [2024-06-27 19:25:41,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6078, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6312, PETRI_PLACES=452, PETRI_TRANSITIONS=496} [2024-06-27 19:25:41,558 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 411 predicate places. [2024-06-27 19:25:41,559 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 496 transitions, 6312 flow [2024-06-27 19:25:41,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:41,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:41,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:41,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-27 19:25:41,559 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)] === [2024-06-27 19:25:41,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:41,559 INFO L85 PathProgramCache]: Analyzing trace with hash 171123714, now seen corresponding path program 27 times [2024-06-27 19:25:41,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:41,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025423530] [2024-06-27 19:25:41,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:41,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:41,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:41,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:41,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025423530] [2024-06-27 19:25:41,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025423530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:41,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:41,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:25:41,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185773843] [2024-06-27 19:25:41,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:41,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:25:41,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:41,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:25:41,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:25:41,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:41,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 496 transitions, 6312 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:41,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:41,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:41,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:42,908 INFO L124 PetriNetUnfolderBase]: 3611/6054 cut-off events. [2024-06-27 19:25:42,908 INFO L125 PetriNetUnfolderBase]: For 448425/448437 co-relation queries the response was YES. [2024-06-27 19:25:42,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41003 conditions, 6054 events. 3611/6054 cut-off events. For 448425/448437 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 41747 event pairs, 867 based on Foata normal form. 20/6073 useless extension candidates. Maximal degree in co-relation 40813. Up to 5431 conditions per place. [2024-06-27 19:25:42,990 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 443 selfloop transitions, 70 changer transitions 0/520 dead transitions. [2024-06-27 19:25:42,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 520 transitions, 7466 flow [2024-06-27 19:25:42,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:25:42,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:25:42,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-27 19:25:42,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5611111111111111 [2024-06-27 19:25:42,991 INFO L175 Difference]: Start difference. First operand has 452 places, 496 transitions, 6312 flow. Second operand 9 states and 202 transitions. [2024-06-27 19:25:42,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 520 transitions, 7466 flow [2024-06-27 19:25:45,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 520 transitions, 7250 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 19:25:45,723 INFO L231 Difference]: Finished difference. Result has 456 places, 497 transitions, 6276 flow [2024-06-27 19:25:45,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6096, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6276, PETRI_PLACES=456, PETRI_TRANSITIONS=497} [2024-06-27 19:25:45,723 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 415 predicate places. [2024-06-27 19:25:45,724 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 497 transitions, 6276 flow [2024-06-27 19:25:45,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:45,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:45,724 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] [2024-06-27 19:25:45,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-27 19:25:45,724 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)] === [2024-06-27 19:25:45,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:45,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1399118828, now seen corresponding path program 28 times [2024-06-27 19:25:45,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:45,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809844750] [2024-06-27 19:25:45,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:45,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:45,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:45,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:45,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:45,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809844750] [2024-06-27 19:25:45,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809844750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:45,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:45,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:25:45,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206969693] [2024-06-27 19:25:45,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:45,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:25:45,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:45,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:25:45,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:25:45,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:45,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 497 transitions, 6276 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:45,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:45,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:45,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:47,122 INFO L124 PetriNetUnfolderBase]: 3639/6095 cut-off events. [2024-06-27 19:25:47,122 INFO L125 PetriNetUnfolderBase]: For 454732/454740 co-relation queries the response was YES. [2024-06-27 19:25:47,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41173 conditions, 6095 events. 3639/6095 cut-off events. For 454732/454740 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 41971 event pairs, 895 based on Foata normal form. 13/6106 useless extension candidates. Maximal degree in co-relation 40982. Up to 5468 conditions per place. [2024-06-27 19:25:47,195 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 418 selfloop transitions, 89 changer transitions 0/514 dead transitions. [2024-06-27 19:25:47,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 514 transitions, 7402 flow [2024-06-27 19:25:47,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:25:47,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:25:47,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-27 19:25:47,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-27 19:25:47,196 INFO L175 Difference]: Start difference. First operand has 456 places, 497 transitions, 6276 flow. Second operand 8 states and 176 transitions. [2024-06-27 19:25:47,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 514 transitions, 7402 flow [2024-06-27 19:25:49,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 514 transitions, 7252 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 19:25:49,760 INFO L231 Difference]: Finished difference. Result has 457 places, 498 transitions, 6343 flow [2024-06-27 19:25:49,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6126, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6343, PETRI_PLACES=457, PETRI_TRANSITIONS=498} [2024-06-27 19:25:49,760 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 416 predicate places. [2024-06-27 19:25:49,761 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 498 transitions, 6343 flow [2024-06-27 19:25:49,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:49,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:49,761 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] [2024-06-27 19:25:49,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-27 19:25:49,761 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)] === [2024-06-27 19:25:49,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:49,762 INFO L85 PathProgramCache]: Analyzing trace with hash -583194814, now seen corresponding path program 29 times [2024-06-27 19:25:49,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:49,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619929577] [2024-06-27 19:25:49,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:49,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:49,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:49,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:49,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:49,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619929577] [2024-06-27 19:25:49,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619929577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:49,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:49,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:25:49,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165089441] [2024-06-27 19:25:49,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:49,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:25:49,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:49,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:25:49,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:25:49,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:49,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 498 transitions, 6343 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:49,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:49,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:49,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:51,081 INFO L124 PetriNetUnfolderBase]: 3654/6120 cut-off events. [2024-06-27 19:25:51,081 INFO L125 PetriNetUnfolderBase]: For 448136/448144 co-relation queries the response was YES. [2024-06-27 19:25:51,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41160 conditions, 6120 events. 3654/6120 cut-off events. For 448136/448144 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 42226 event pairs, 892 based on Foata normal form. 13/6131 useless extension candidates. Maximal degree in co-relation 40968. Up to 5385 conditions per place. [2024-06-27 19:25:51,164 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 421 selfloop transitions, 91 changer transitions 0/519 dead transitions. [2024-06-27 19:25:51,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 519 transitions, 7533 flow [2024-06-27 19:25:51,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:25:51,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:25:51,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-27 19:25:51,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.559375 [2024-06-27 19:25:51,165 INFO L175 Difference]: Start difference. First operand has 457 places, 498 transitions, 6343 flow. Second operand 8 states and 179 transitions. [2024-06-27 19:25:51,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 519 transitions, 7533 flow [2024-06-27 19:25:54,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 519 transitions, 7340 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 19:25:54,139 INFO L231 Difference]: Finished difference. Result has 459 places, 499 transitions, 6372 flow [2024-06-27 19:25:54,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6150, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6372, PETRI_PLACES=459, PETRI_TRANSITIONS=499} [2024-06-27 19:25:54,139 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 418 predicate places. [2024-06-27 19:25:54,139 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 499 transitions, 6372 flow [2024-06-27 19:25:54,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:54,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:54,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:54,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-27 19:25:54,139 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)] === [2024-06-27 19:25:54,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:54,140 INFO L85 PathProgramCache]: Analyzing trace with hash -555158446, now seen corresponding path program 7 times [2024-06-27 19:25:54,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:54,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201918815] [2024-06-27 19:25:54,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:54,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:54,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:54,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:54,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201918815] [2024-06-27 19:25:54,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201918815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:54,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:54,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:25:54,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154999621] [2024-06-27 19:25:54,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:54,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:25:54,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:54,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:25:54,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:25:54,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:54,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 499 transitions, 6372 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:54,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:54,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:54,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:55,614 INFO L124 PetriNetUnfolderBase]: 3715/6224 cut-off events. [2024-06-27 19:25:55,614 INFO L125 PetriNetUnfolderBase]: For 483088/483100 co-relation queries the response was YES. [2024-06-27 19:25:55,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42584 conditions, 6224 events. 3715/6224 cut-off events. For 483088/483100 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 42998 event pairs, 799 based on Foata normal form. 18/6241 useless extension candidates. Maximal degree in co-relation 42391. Up to 5469 conditions per place. [2024-06-27 19:25:55,702 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 470 selfloop transitions, 59 changer transitions 0/536 dead transitions. [2024-06-27 19:25:55,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 536 transitions, 7863 flow [2024-06-27 19:25:55,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:25:55,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:25:55,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-27 19:25:55,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-06-27 19:25:55,703 INFO L175 Difference]: Start difference. First operand has 459 places, 499 transitions, 6372 flow. Second operand 9 states and 203 transitions. [2024-06-27 19:25:55,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 536 transitions, 7863 flow [2024-06-27 19:25:58,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 536 transitions, 7663 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 19:25:58,425 INFO L231 Difference]: Finished difference. Result has 462 places, 504 transitions, 6375 flow [2024-06-27 19:25:58,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6172, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6375, PETRI_PLACES=462, PETRI_TRANSITIONS=504} [2024-06-27 19:25:58,426 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 421 predicate places. [2024-06-27 19:25:58,426 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 504 transitions, 6375 flow [2024-06-27 19:25:58,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:58,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:58,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:58,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-27 19:25:58,426 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)] === [2024-06-27 19:25:58,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:58,427 INFO L85 PathProgramCache]: Analyzing trace with hash -212193680, now seen corresponding path program 8 times [2024-06-27 19:25:58,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:58,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139466684] [2024-06-27 19:25:58,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:58,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:58,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:58,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:58,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139466684] [2024-06-27 19:25:58,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139466684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:58,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:58,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:25:58,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883058620] [2024-06-27 19:25:58,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:58,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:25:58,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:58,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:25:58,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:25:58,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:58,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 504 transitions, 6375 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:58,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:58,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:58,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:59,865 INFO L124 PetriNetUnfolderBase]: 3735/6260 cut-off events. [2024-06-27 19:25:59,865 INFO L125 PetriNetUnfolderBase]: For 490006/490018 co-relation queries the response was YES. [2024-06-27 19:25:59,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42803 conditions, 6260 events. 3735/6260 cut-off events. For 490006/490018 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 43279 event pairs, 804 based on Foata normal form. 18/6277 useless extension candidates. Maximal degree in co-relation 42609. Up to 5546 conditions per place. [2024-06-27 19:25:59,949 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 463 selfloop transitions, 59 changer transitions 0/529 dead transitions. [2024-06-27 19:25:59,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 529 transitions, 7527 flow [2024-06-27 19:25:59,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:25:59,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:25:59,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-27 19:25:59,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-27 19:25:59,949 INFO L175 Difference]: Start difference. First operand has 462 places, 504 transitions, 6375 flow. Second operand 8 states and 180 transitions. [2024-06-27 19:25:59,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 529 transitions, 7527 flow [2024-06-27 19:26:02,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 529 transitions, 7368 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 19:26:02,786 INFO L231 Difference]: Finished difference. Result has 465 places, 505 transitions, 6370 flow [2024-06-27 19:26:02,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6222, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6370, PETRI_PLACES=465, PETRI_TRANSITIONS=505} [2024-06-27 19:26:02,787 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 424 predicate places. [2024-06-27 19:26:02,787 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 505 transitions, 6370 flow [2024-06-27 19:26:02,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:02,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:02,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:02,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-27 19:26:02,787 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)] === [2024-06-27 19:26:02,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:02,787 INFO L85 PathProgramCache]: Analyzing trace with hash -200479696, now seen corresponding path program 9 times [2024-06-27 19:26:02,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:02,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013791872] [2024-06-27 19:26:02,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:02,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:02,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:02,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:02,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:02,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013791872] [2024-06-27 19:26:02,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013791872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:02,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:02,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:26:02,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620510928] [2024-06-27 19:26:02,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:02,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:26:02,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:02,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:26:02,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:26:02,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:26:02,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 505 transitions, 6370 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:02,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:02,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:26:02,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:04,254 INFO L124 PetriNetUnfolderBase]: 3788/6349 cut-off events. [2024-06-27 19:26:04,255 INFO L125 PetriNetUnfolderBase]: For 541314/541326 co-relation queries the response was YES. [2024-06-27 19:26:04,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43910 conditions, 6349 events. 3788/6349 cut-off events. For 541314/541326 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 44042 event pairs, 871 based on Foata normal form. 18/6366 useless extension candidates. Maximal degree in co-relation 43717. Up to 4951 conditions per place. [2024-06-27 19:26:04,324 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 433 selfloop transitions, 97 changer transitions 0/537 dead transitions. [2024-06-27 19:26:04,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 537 transitions, 7882 flow [2024-06-27 19:26:04,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:26:04,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:26:04,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-27 19:26:04,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-27 19:26:04,328 INFO L175 Difference]: Start difference. First operand has 465 places, 505 transitions, 6370 flow. Second operand 8 states and 188 transitions. [2024-06-27 19:26:04,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 537 transitions, 7882 flow [2024-06-27 19:26:07,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 537 transitions, 7723 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-27 19:26:07,815 INFO L231 Difference]: Finished difference. Result has 464 places, 507 transitions, 6477 flow [2024-06-27 19:26:07,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6217, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6477, PETRI_PLACES=464, PETRI_TRANSITIONS=507} [2024-06-27 19:26:07,815 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 423 predicate places. [2024-06-27 19:26:07,816 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 507 transitions, 6477 flow [2024-06-27 19:26:07,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:07,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:07,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:07,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-27 19:26:07,816 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)] === [2024-06-27 19:26:07,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:07,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1547199018, now seen corresponding path program 10 times [2024-06-27 19:26:07,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:07,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912665609] [2024-06-27 19:26:07,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:07,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:07,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:07,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:07,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912665609] [2024-06-27 19:26:07,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912665609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:07,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:07,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:26:07,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115632661] [2024-06-27 19:26:07,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:07,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:26:07,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:07,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:26:07,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:26:07,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:26:07,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 507 transitions, 6477 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:07,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:07,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:26:07,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:09,228 INFO L124 PetriNetUnfolderBase]: 3887/6500 cut-off events. [2024-06-27 19:26:09,228 INFO L125 PetriNetUnfolderBase]: For 629022/629034 co-relation queries the response was YES. [2024-06-27 19:26:09,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46860 conditions, 6500 events. 3887/6500 cut-off events. For 629022/629034 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 45263 event pairs, 946 based on Foata normal form. 18/6517 useless extension candidates. Maximal degree in co-relation 46669. Up to 5641 conditions per place. [2024-06-27 19:26:09,314 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 451 selfloop transitions, 79 changer transitions 0/537 dead transitions. [2024-06-27 19:26:09,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 537 transitions, 8245 flow [2024-06-27 19:26:09,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:26:09,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:26:09,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-27 19:26:09,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-27 19:26:09,315 INFO L175 Difference]: Start difference. First operand has 464 places, 507 transitions, 6477 flow. Second operand 8 states and 186 transitions. [2024-06-27 19:26:09,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 537 transitions, 8245 flow [2024-06-27 19:26:13,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 537 transitions, 8126 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 19:26:13,306 INFO L231 Difference]: Finished difference. Result has 469 places, 510 transitions, 6622 flow [2024-06-27 19:26:13,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6358, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6622, PETRI_PLACES=469, PETRI_TRANSITIONS=510} [2024-06-27 19:26:13,306 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 428 predicate places. [2024-06-27 19:26:13,306 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 510 transitions, 6622 flow [2024-06-27 19:26:13,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:13,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:13,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:13,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-27 19:26:13,306 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)] === [2024-06-27 19:26:13,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:13,307 INFO L85 PathProgramCache]: Analyzing trace with hash -988545966, now seen corresponding path program 11 times [2024-06-27 19:26:13,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:13,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277867690] [2024-06-27 19:26:13,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:13,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:13,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:13,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:13,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277867690] [2024-06-27 19:26:13,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277867690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:13,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:13,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:26:13,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084589394] [2024-06-27 19:26:13,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:13,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:26:13,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:13,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:26:13,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:26:13,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:26:13,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 510 transitions, 6622 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:13,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:13,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:26:13,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:14,738 INFO L124 PetriNetUnfolderBase]: 3874/6477 cut-off events. [2024-06-27 19:26:14,738 INFO L125 PetriNetUnfolderBase]: For 596244/596256 co-relation queries the response was YES. [2024-06-27 19:26:14,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46205 conditions, 6477 events. 3874/6477 cut-off events. For 596244/596256 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 45089 event pairs, 956 based on Foata normal form. 18/6490 useless extension candidates. Maximal degree in co-relation 46011. Up to 5902 conditions per place. [2024-06-27 19:26:14,826 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 482 selfloop transitions, 41 changer transitions 0/530 dead transitions. [2024-06-27 19:26:14,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 530 transitions, 7736 flow [2024-06-27 19:26:14,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:26:14,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:26:14,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-27 19:26:14,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-27 19:26:14,827 INFO L175 Difference]: Start difference. First operand has 469 places, 510 transitions, 6622 flow. Second operand 8 states and 176 transitions. [2024-06-27 19:26:14,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 530 transitions, 7736 flow [2024-06-27 19:26:18,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 530 transitions, 7620 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-27 19:26:18,793 INFO L231 Difference]: Finished difference. Result has 474 places, 510 transitions, 6592 flow [2024-06-27 19:26:18,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6506, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6592, PETRI_PLACES=474, PETRI_TRANSITIONS=510} [2024-06-27 19:26:18,794 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 433 predicate places. [2024-06-27 19:26:18,794 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 510 transitions, 6592 flow [2024-06-27 19:26:18,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:18,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:18,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:18,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-27 19:26:18,794 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)] === [2024-06-27 19:26:18,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:18,794 INFO L85 PathProgramCache]: Analyzing trace with hash -854598066, now seen corresponding path program 12 times [2024-06-27 19:26:18,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:18,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840775443] [2024-06-27 19:26:18,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:18,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:18,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:18,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:18,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:18,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840775443] [2024-06-27 19:26:18,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840775443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:18,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:18,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:26:18,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95960264] [2024-06-27 19:26:18,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:18,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:26:18,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:18,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:26:18,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:26:18,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:26:18,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 510 transitions, 6592 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:18,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:18,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:26:18,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:20,182 INFO L124 PetriNetUnfolderBase]: 3902/6531 cut-off events. [2024-06-27 19:26:20,182 INFO L125 PetriNetUnfolderBase]: For 619620/619632 co-relation queries the response was YES. [2024-06-27 19:26:20,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46599 conditions, 6531 events. 3902/6531 cut-off events. For 619620/619632 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 45534 event pairs, 994 based on Foata normal form. 20/6550 useless extension candidates. Maximal degree in co-relation 46403. Up to 5901 conditions per place. [2024-06-27 19:26:20,268 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 451 selfloop transitions, 72 changer transitions 0/530 dead transitions. [2024-06-27 19:26:20,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 530 transitions, 7756 flow [2024-06-27 19:26:20,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:26:20,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:26:20,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-27 19:26:20,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.559375 [2024-06-27 19:26:20,269 INFO L175 Difference]: Start difference. First operand has 474 places, 510 transitions, 6592 flow. Second operand 8 states and 179 transitions. [2024-06-27 19:26:20,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 530 transitions, 7756 flow [2024-06-27 19:26:23,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 530 transitions, 7660 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 19:26:23,743 INFO L231 Difference]: Finished difference. Result has 475 places, 511 transitions, 6681 flow [2024-06-27 19:26:23,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6496, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6681, PETRI_PLACES=475, PETRI_TRANSITIONS=511} [2024-06-27 19:26:23,744 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 434 predicate places. [2024-06-27 19:26:23,744 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 511 transitions, 6681 flow [2024-06-27 19:26:23,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:23,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:23,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:23,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-27 19:26:23,745 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)] === [2024-06-27 19:26:23,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:23,745 INFO L85 PathProgramCache]: Analyzing trace with hash -846027186, now seen corresponding path program 13 times [2024-06-27 19:26:23,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:23,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045018428] [2024-06-27 19:26:23,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:23,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:23,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:23,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:23,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:23,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045018428] [2024-06-27 19:26:23,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045018428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:23,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:23,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:26:23,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040734357] [2024-06-27 19:26:23,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:23,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:26:23,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:23,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:26:23,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:26:23,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:26:23,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 511 transitions, 6681 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:23,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:23,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:26:23,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:25,284 INFO L124 PetriNetUnfolderBase]: 3884/6501 cut-off events. [2024-06-27 19:26:25,284 INFO L125 PetriNetUnfolderBase]: For 570195/570207 co-relation queries the response was YES. [2024-06-27 19:26:25,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45546 conditions, 6501 events. 3884/6501 cut-off events. For 570195/570207 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 45318 event pairs, 968 based on Foata normal form. 20/6520 useless extension candidates. Maximal degree in co-relation 45349. Up to 5767 conditions per place. [2024-06-27 19:26:25,371 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 453 selfloop transitions, 74 changer transitions 0/534 dead transitions. [2024-06-27 19:26:25,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 534 transitions, 7867 flow [2024-06-27 19:26:25,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:26:25,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:26:25,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-27 19:26:25,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-27 19:26:25,371 INFO L175 Difference]: Start difference. First operand has 475 places, 511 transitions, 6681 flow. Second operand 8 states and 182 transitions. [2024-06-27 19:26:25,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 534 transitions, 7867 flow [2024-06-27 19:26:28,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 534 transitions, 7696 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 19:26:28,782 INFO L231 Difference]: Finished difference. Result has 477 places, 511 transitions, 6662 flow [2024-06-27 19:26:28,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6510, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6662, PETRI_PLACES=477, PETRI_TRANSITIONS=511} [2024-06-27 19:26:28,782 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 436 predicate places. [2024-06-27 19:26:28,782 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 511 transitions, 6662 flow [2024-06-27 19:26:28,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:28,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:28,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:28,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-27 19:26:28,783 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)] === [2024-06-27 19:26:28,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:28,783 INFO L85 PathProgramCache]: Analyzing trace with hash -858567632, now seen corresponding path program 14 times [2024-06-27 19:26:28,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:28,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947382195] [2024-06-27 19:26:28,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:28,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:28,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:28,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:28,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947382195] [2024-06-27 19:26:28,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947382195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:28,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:28,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:26:28,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346186040] [2024-06-27 19:26:28,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:28,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:26:28,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:28,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:26:28,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:26:28,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:26:28,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 511 transitions, 6662 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:28,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:28,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:26:28,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:30,218 INFO L124 PetriNetUnfolderBase]: 3899/6530 cut-off events. [2024-06-27 19:26:30,218 INFO L125 PetriNetUnfolderBase]: For 561479/561491 co-relation queries the response was YES. [2024-06-27 19:26:30,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45449 conditions, 6530 events. 3899/6530 cut-off events. For 561479/561491 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 45578 event pairs, 983 based on Foata normal form. 20/6549 useless extension candidates. Maximal degree in co-relation 45251. Up to 5964 conditions per place. [2024-06-27 19:26:30,304 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 492 selfloop transitions, 34 changer transitions 0/533 dead transitions. [2024-06-27 19:26:30,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 533 transitions, 7842 flow [2024-06-27 19:26:30,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:30,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:30,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-27 19:26:30,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 19:26:30,305 INFO L175 Difference]: Start difference. First operand has 477 places, 511 transitions, 6662 flow. Second operand 7 states and 161 transitions. [2024-06-27 19:26:30,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 533 transitions, 7842 flow [2024-06-27 19:26:34,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 533 transitions, 7672 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 19:26:34,473 INFO L231 Difference]: Finished difference. Result has 477 places, 512 transitions, 6605 flow [2024-06-27 19:26:34,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6492, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6605, PETRI_PLACES=477, PETRI_TRANSITIONS=512} [2024-06-27 19:26:34,473 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 436 predicate places. [2024-06-27 19:26:34,473 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 512 transitions, 6605 flow [2024-06-27 19:26:34,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:34,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:34,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:34,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-27 19:26:34,474 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)] === [2024-06-27 19:26:34,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:34,474 INFO L85 PathProgramCache]: Analyzing trace with hash -858715502, now seen corresponding path program 15 times [2024-06-27 19:26:34,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:34,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772048729] [2024-06-27 19:26:34,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:34,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:34,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:34,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:34,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:34,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772048729] [2024-06-27 19:26:34,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772048729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:34,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:34,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:26:34,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073838177] [2024-06-27 19:26:34,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:34,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:26:34,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:34,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:26:34,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:26:34,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:26:34,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 512 transitions, 6605 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:34,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:34,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:26:34,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:35,939 INFO L124 PetriNetUnfolderBase]: 3886/6511 cut-off events. [2024-06-27 19:26:35,939 INFO L125 PetriNetUnfolderBase]: For 508986/508998 co-relation queries the response was YES. [2024-06-27 19:26:36,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44449 conditions, 6511 events. 3886/6511 cut-off events. For 508986/508998 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 45439 event pairs, 970 based on Foata normal form. 18/6528 useless extension candidates. Maximal degree in co-relation 44250. Up to 5897 conditions per place. [2024-06-27 19:26:36,025 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 494 selfloop transitions, 39 changer transitions 0/540 dead transitions. [2024-06-27 19:26:36,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 540 transitions, 7799 flow [2024-06-27 19:26:36,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:26:36,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:26:36,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-27 19:26:36,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-27 19:26:36,026 INFO L175 Difference]: Start difference. First operand has 477 places, 512 transitions, 6605 flow. Second operand 8 states and 185 transitions. [2024-06-27 19:26:36,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 540 transitions, 7799 flow [2024-06-27 19:26:39,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 540 transitions, 7704 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 19:26:39,320 INFO L231 Difference]: Finished difference. Result has 480 places, 512 transitions, 6592 flow [2024-06-27 19:26:39,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6510, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6592, PETRI_PLACES=480, PETRI_TRANSITIONS=512} [2024-06-27 19:26:39,320 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 439 predicate places. [2024-06-27 19:26:39,320 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 512 transitions, 6592 flow [2024-06-27 19:26:39,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:39,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:39,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:39,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-27 19:26:39,321 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)] === [2024-06-27 19:26:39,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:39,321 INFO L85 PathProgramCache]: Analyzing trace with hash -593018222, now seen corresponding path program 16 times [2024-06-27 19:26:39,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:39,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406326027] [2024-06-27 19:26:39,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:39,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:39,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:39,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:39,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406326027] [2024-06-27 19:26:39,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406326027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:39,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:39,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:26:39,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275879698] [2024-06-27 19:26:39,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:39,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:26:39,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:39,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:26:39,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:26:39,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:26:39,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 512 transitions, 6592 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:39,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:39,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:26:39,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:40,808 INFO L124 PetriNetUnfolderBase]: 3873/6492 cut-off events. [2024-06-27 19:26:40,808 INFO L125 PetriNetUnfolderBase]: For 467729/467741 co-relation queries the response was YES. [2024-06-27 19:26:40,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43440 conditions, 6492 events. 3873/6492 cut-off events. For 467729/467741 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 45359 event pairs, 867 based on Foata normal form. 18/6509 useless extension candidates. Maximal degree in co-relation 43240. Up to 5834 conditions per place. [2024-06-27 19:26:40,893 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 485 selfloop transitions, 45 changer transitions 0/537 dead transitions. [2024-06-27 19:26:40,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 537 transitions, 7734 flow [2024-06-27 19:26:40,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:40,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:40,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-27 19:26:40,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-27 19:26:40,894 INFO L175 Difference]: Start difference. First operand has 480 places, 512 transitions, 6592 flow. Second operand 7 states and 165 transitions. [2024-06-27 19:26:40,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 537 transitions, 7734 flow [2024-06-27 19:26:43,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 537 transitions, 7556 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-27 19:26:43,927 INFO L231 Difference]: Finished difference. Result has 480 places, 512 transitions, 6508 flow [2024-06-27 19:26:43,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6414, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6508, PETRI_PLACES=480, PETRI_TRANSITIONS=512} [2024-06-27 19:26:43,927 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 439 predicate places. [2024-06-27 19:26:43,927 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 512 transitions, 6508 flow [2024-06-27 19:26:43,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:43,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:43,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:43,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-27 19:26:43,927 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)] === [2024-06-27 19:26:43,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:43,928 INFO L85 PathProgramCache]: Analyzing trace with hash 171308412, now seen corresponding path program 17 times [2024-06-27 19:26:43,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:43,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297916277] [2024-06-27 19:26:43,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:43,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:43,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:44,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:44,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:44,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297916277] [2024-06-27 19:26:44,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297916277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:44,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:44,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:26:44,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338483771] [2024-06-27 19:26:44,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:44,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:26:44,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:44,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:26:44,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:26:44,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:26:44,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 512 transitions, 6508 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:44,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:44,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:26:44,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:45,511 INFO L124 PetriNetUnfolderBase]: 3901/6536 cut-off events. [2024-06-27 19:26:45,512 INFO L125 PetriNetUnfolderBase]: For 490500/490512 co-relation queries the response was YES. [2024-06-27 19:26:45,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43583 conditions, 6536 events. 3901/6536 cut-off events. For 490500/490512 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 45678 event pairs, 973 based on Foata normal form. 20/6555 useless extension candidates. Maximal degree in co-relation 43383. Up to 5925 conditions per place. [2024-06-27 19:26:45,580 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 458 selfloop transitions, 69 changer transitions 0/534 dead transitions. [2024-06-27 19:26:45,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 534 transitions, 7684 flow [2024-06-27 19:26:45,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:26:45,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:26:45,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-27 19:26:45,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-27 19:26:45,580 INFO L175 Difference]: Start difference. First operand has 480 places, 512 transitions, 6508 flow. Second operand 10 states and 215 transitions. [2024-06-27 19:26:45,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 534 transitions, 7684 flow [2024-06-27 19:26:48,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 534 transitions, 7502 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 19:26:48,528 INFO L231 Difference]: Finished difference. Result has 481 places, 513 transitions, 6505 flow [2024-06-27 19:26:48,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6328, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6505, PETRI_PLACES=481, PETRI_TRANSITIONS=513} [2024-06-27 19:26:48,529 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 440 predicate places. [2024-06-27 19:26:48,529 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 513 transitions, 6505 flow [2024-06-27 19:26:48,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:48,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:48,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:48,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-27 19:26:48,529 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)] === [2024-06-27 19:26:48,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:48,529 INFO L85 PathProgramCache]: Analyzing trace with hash -459070322, now seen corresponding path program 18 times [2024-06-27 19:26:48,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:48,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920306992] [2024-06-27 19:26:48,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:48,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:48,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:48,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:48,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:48,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920306992] [2024-06-27 19:26:48,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920306992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:48,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:48,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:26:48,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455675637] [2024-06-27 19:26:48,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:48,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:26:48,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:48,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:26:48,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:26:48,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:26:48,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 513 transitions, 6505 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:48,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:48,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:26:48,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:49,975 INFO L124 PetriNetUnfolderBase]: 3929/6580 cut-off events. [2024-06-27 19:26:49,975 INFO L125 PetriNetUnfolderBase]: For 498068/498080 co-relation queries the response was YES. [2024-06-27 19:26:50,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43788 conditions, 6580 events. 3929/6580 cut-off events. For 498068/498080 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 46032 event pairs, 993 based on Foata normal form. 20/6599 useless extension candidates. Maximal degree in co-relation 43589. Up to 5969 conditions per place. [2024-06-27 19:26:50,066 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 463 selfloop transitions, 62 changer transitions 0/532 dead transitions. [2024-06-27 19:26:50,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 532 transitions, 7671 flow [2024-06-27 19:26:50,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:50,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:50,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-27 19:26:50,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-27 19:26:50,067 INFO L175 Difference]: Start difference. First operand has 481 places, 513 transitions, 6505 flow. Second operand 7 states and 160 transitions. [2024-06-27 19:26:50,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 532 transitions, 7671 flow [2024-06-27 19:26:53,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 532 transitions, 7518 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 19:26:53,668 INFO L231 Difference]: Finished difference. Result has 480 places, 514 transitions, 6517 flow [2024-06-27 19:26:53,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6352, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6517, PETRI_PLACES=480, PETRI_TRANSITIONS=514} [2024-06-27 19:26:53,668 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 439 predicate places. [2024-06-27 19:26:53,668 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 514 transitions, 6517 flow [2024-06-27 19:26:53,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:53,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:53,669 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] [2024-06-27 19:26:53,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-27 19:26:53,669 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)] === [2024-06-27 19:26:53,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:53,669 INFO L85 PathProgramCache]: Analyzing trace with hash 399209562, now seen corresponding path program 19 times [2024-06-27 19:26:53,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:53,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244568035] [2024-06-27 19:26:53,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:53,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:53,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:53,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:53,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:53,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244568035] [2024-06-27 19:26:53,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244568035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:53,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:53,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:26:53,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372801832] [2024-06-27 19:26:53,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:53,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:26:53,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:53,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:26:53,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:26:53,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:26:53,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 514 transitions, 6517 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:53,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:53,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:26:53,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:55,101 INFO L124 PetriNetUnfolderBase]: 3957/6624 cut-off events. [2024-06-27 19:26:55,101 INFO L125 PetriNetUnfolderBase]: For 506146/506158 co-relation queries the response was YES. [2024-06-27 19:26:55,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44161 conditions, 6624 events. 3957/6624 cut-off events. For 506146/506158 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 46333 event pairs, 993 based on Foata normal form. 20/6643 useless extension candidates. Maximal degree in co-relation 43961. Up to 6013 conditions per place. [2024-06-27 19:26:55,191 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 462 selfloop transitions, 66 changer transitions 0/535 dead transitions. [2024-06-27 19:26:55,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 535 transitions, 7695 flow [2024-06-27 19:26:55,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:26:55,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:26:55,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-27 19:26:55,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5472222222222223 [2024-06-27 19:26:55,192 INFO L175 Difference]: Start difference. First operand has 480 places, 514 transitions, 6517 flow. Second operand 9 states and 197 transitions. [2024-06-27 19:26:55,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 535 transitions, 7695 flow [2024-06-27 19:26:59,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 535 transitions, 7554 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 19:26:59,197 INFO L231 Difference]: Finished difference. Result has 484 places, 515 transitions, 6551 flow [2024-06-27 19:26:59,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6376, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6551, PETRI_PLACES=484, PETRI_TRANSITIONS=515} [2024-06-27 19:26:59,198 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 443 predicate places. [2024-06-27 19:26:59,198 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 515 transitions, 6551 flow [2024-06-27 19:26:59,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:59,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:59,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:59,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-27 19:26:59,198 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)] === [2024-06-27 19:26:59,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:59,198 INFO L85 PathProgramCache]: Analyzing trace with hash -450499442, now seen corresponding path program 20 times [2024-06-27 19:26:59,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:59,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289022779] [2024-06-27 19:26:59,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:59,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:59,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:59,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:59,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289022779] [2024-06-27 19:26:59,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289022779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:59,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:59,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:26:59,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902060133] [2024-06-27 19:26:59,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:59,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:26:59,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:59,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:26:59,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:26:59,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:26:59,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 515 transitions, 6551 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:59,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:59,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:26:59,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:00,812 INFO L124 PetriNetUnfolderBase]: 3985/6668 cut-off events. [2024-06-27 19:27:00,812 INFO L125 PetriNetUnfolderBase]: For 513957/513969 co-relation queries the response was YES. [2024-06-27 19:27:00,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44556 conditions, 6668 events. 3985/6668 cut-off events. For 513957/513969 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 46740 event pairs, 999 based on Foata normal form. 20/6687 useless extension candidates. Maximal degree in co-relation 44355. Up to 5917 conditions per place. [2024-06-27 19:27:00,885 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 466 selfloop transitions, 65 changer transitions 0/538 dead transitions. [2024-06-27 19:27:00,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 538 transitions, 7781 flow [2024-06-27 19:27:00,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:27:00,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:27:00,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 19:27:00,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-27 19:27:00,886 INFO L175 Difference]: Start difference. First operand has 484 places, 515 transitions, 6551 flow. Second operand 7 states and 163 transitions. [2024-06-27 19:27:00,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 538 transitions, 7781 flow [2024-06-27 19:27:04,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 538 transitions, 7630 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 19:27:04,707 INFO L231 Difference]: Finished difference. Result has 484 places, 516 transitions, 6574 flow [2024-06-27 19:27:04,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6400, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6574, PETRI_PLACES=484, PETRI_TRANSITIONS=516} [2024-06-27 19:27:04,707 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 443 predicate places. [2024-06-27 19:27:04,707 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 516 transitions, 6574 flow [2024-06-27 19:27:04,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:04,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:04,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:04,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-27 19:27:04,707 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)] === [2024-06-27 19:27:04,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:04,708 INFO L85 PathProgramCache]: Analyzing trace with hash 407780442, now seen corresponding path program 21 times [2024-06-27 19:27:04,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:04,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010084243] [2024-06-27 19:27:04,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:04,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:04,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:04,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:04,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:04,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010084243] [2024-06-27 19:27:04,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010084243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:04,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:04,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:27:04,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585992861] [2024-06-27 19:27:04,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:04,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:27:04,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:04,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:27:04,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:27:04,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:27:04,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 516 transitions, 6574 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:04,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:04,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:27:04,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:06,169 INFO L124 PetriNetUnfolderBase]: 4000/6693 cut-off events. [2024-06-27 19:27:06,169 INFO L125 PetriNetUnfolderBase]: For 504972/504984 co-relation queries the response was YES. [2024-06-27 19:27:06,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44533 conditions, 6693 events. 4000/6693 cut-off events. For 504972/504984 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 46979 event pairs, 1006 based on Foata normal form. 20/6712 useless extension candidates. Maximal degree in co-relation 44331. Up to 5942 conditions per place. [2024-06-27 19:27:06,260 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 465 selfloop transitions, 69 changer transitions 0/541 dead transitions. [2024-06-27 19:27:06,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 541 transitions, 7816 flow [2024-06-27 19:27:06,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:27:06,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:27:06,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-27 19:27:06,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-27 19:27:06,261 INFO L175 Difference]: Start difference. First operand has 484 places, 516 transitions, 6574 flow. Second operand 9 states and 200 transitions. [2024-06-27 19:27:06,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 541 transitions, 7816 flow [2024-06-27 19:27:09,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 541 transitions, 7664 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 19:27:09,875 INFO L231 Difference]: Finished difference. Result has 488 places, 517 transitions, 6606 flow [2024-06-27 19:27:09,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6422, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6606, PETRI_PLACES=488, PETRI_TRANSITIONS=517} [2024-06-27 19:27:09,876 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 447 predicate places. [2024-06-27 19:27:09,876 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 517 transitions, 6606 flow [2024-06-27 19:27:09,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:09,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:09,876 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] [2024-06-27 19:27:09,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-27 19:27:09,876 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)] === [2024-06-27 19:27:09,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:09,876 INFO L85 PathProgramCache]: Analyzing trace with hash -592602512, now seen corresponding path program 22 times [2024-06-27 19:27:09,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:09,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770492555] [2024-06-27 19:27:09,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:09,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:09,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:09,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:09,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:09,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770492555] [2024-06-27 19:27:09,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770492555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:09,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:09,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:27:09,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689131604] [2024-06-27 19:27:09,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:09,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:27:09,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:09,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:27:09,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:27:10,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:27:10,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 517 transitions, 6606 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:10,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:10,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:27:10,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:11,322 INFO L124 PetriNetUnfolderBase]: 3987/6674 cut-off events. [2024-06-27 19:27:11,322 INFO L125 PetriNetUnfolderBase]: For 443054/443066 co-relation queries the response was YES. [2024-06-27 19:27:11,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43484 conditions, 6674 events. 3987/6674 cut-off events. For 443054/443066 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 46880 event pairs, 912 based on Foata normal form. 18/6691 useless extension candidates. Maximal degree in co-relation 43281. Up to 5520 conditions per place. [2024-06-27 19:27:11,414 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 453 selfloop transitions, 84 changer transitions 0/544 dead transitions. [2024-06-27 19:27:11,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 544 transitions, 7826 flow [2024-06-27 19:27:11,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:27:11,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:27:11,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 19:27:11,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 19:27:11,415 INFO L175 Difference]: Start difference. First operand has 488 places, 517 transitions, 6606 flow. Second operand 7 states and 168 transitions. [2024-06-27 19:27:11,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 544 transitions, 7826 flow [2024-06-27 19:27:14,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 544 transitions, 7654 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 19:27:14,668 INFO L231 Difference]: Finished difference. Result has 488 places, 517 transitions, 6606 flow [2024-06-27 19:27:14,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6434, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6606, PETRI_PLACES=488, PETRI_TRANSITIONS=517} [2024-06-27 19:27:14,668 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 447 predicate places. [2024-06-27 19:27:14,668 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 517 transitions, 6606 flow [2024-06-27 19:27:14,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:14,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:14,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:14,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-27 19:27:14,669 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:14,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:14,669 INFO L85 PathProgramCache]: Analyzing trace with hash 599620098, now seen corresponding path program 4 times [2024-06-27 19:27:14,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:14,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385660286] [2024-06-27 19:27:14,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:14,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:14,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:14,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:14,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:14,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385660286] [2024-06-27 19:27:14,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385660286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:14,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:14,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:27:14,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174199869] [2024-06-27 19:27:14,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:14,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:27:14,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:14,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:27:14,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:27:14,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:27:14,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 517 transitions, 6606 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:14,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:14,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:27:14,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:16,300 INFO L124 PetriNetUnfolderBase]: 4015/6720 cut-off events. [2024-06-27 19:27:16,300 INFO L125 PetriNetUnfolderBase]: For 448084/448096 co-relation queries the response was YES. [2024-06-27 19:27:16,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43801 conditions, 6720 events. 4015/6720 cut-off events. For 448084/448096 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 47243 event pairs, 995 based on Foata normal form. 18/6737 useless extension candidates. Maximal degree in co-relation 43597. Up to 6015 conditions per place. [2024-06-27 19:27:16,377 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 464 selfloop transitions, 76 changer transitions 0/547 dead transitions. [2024-06-27 19:27:16,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 547 transitions, 7860 flow [2024-06-27 19:27:16,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:27:16,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:27:16,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-27 19:27:16,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5575 [2024-06-27 19:27:16,378 INFO L175 Difference]: Start difference. First operand has 488 places, 517 transitions, 6606 flow. Second operand 10 states and 223 transitions. [2024-06-27 19:27:16,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 547 transitions, 7860 flow [2024-06-27 19:27:19,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 547 transitions, 7465 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-27 19:27:19,698 INFO L231 Difference]: Finished difference. Result has 490 places, 520 transitions, 6433 flow [2024-06-27 19:27:19,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6211, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6433, PETRI_PLACES=490, PETRI_TRANSITIONS=520} [2024-06-27 19:27:19,698 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 449 predicate places. [2024-06-27 19:27:19,698 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 520 transitions, 6433 flow [2024-06-27 19:27:19,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:19,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:19,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:19,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-27 19:27:19,699 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:19,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:19,699 INFO L85 PathProgramCache]: Analyzing trace with hash 599620284, now seen corresponding path program 2 times [2024-06-27 19:27:19,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:19,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679855629] [2024-06-27 19:27:19,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:19,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:19,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:19,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:19,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:19,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679855629] [2024-06-27 19:27:19,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679855629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:19,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:19,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:27:19,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848523456] [2024-06-27 19:27:19,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:19,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:27:19,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:19,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:27:19,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:27:19,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:27:19,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 520 transitions, 6433 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:19,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:19,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:27:19,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:21,245 INFO L124 PetriNetUnfolderBase]: 4035/6750 cut-off events. [2024-06-27 19:27:21,245 INFO L125 PetriNetUnfolderBase]: For 451826/451838 co-relation queries the response was YES. [2024-06-27 19:27:21,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43101 conditions, 6750 events. 4035/6750 cut-off events. For 451826/451838 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 47488 event pairs, 1027 based on Foata normal form. 18/6767 useless extension candidates. Maximal degree in co-relation 42898. Up to 6027 conditions per place. [2024-06-27 19:27:21,332 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 461 selfloop transitions, 77 changer transitions 0/545 dead transitions. [2024-06-27 19:27:21,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 545 transitions, 7647 flow [2024-06-27 19:27:21,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:27:21,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:27:21,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-27 19:27:21,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.545 [2024-06-27 19:27:21,337 INFO L175 Difference]: Start difference. First operand has 490 places, 520 transitions, 6433 flow. Second operand 10 states and 218 transitions. [2024-06-27 19:27:21,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 545 transitions, 7647 flow [2024-06-27 19:27:24,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 545 transitions, 7479 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 19:27:24,943 INFO L231 Difference]: Finished difference. Result has 492 places, 521 transitions, 6452 flow [2024-06-27 19:27:24,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6265, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6452, PETRI_PLACES=492, PETRI_TRANSITIONS=521} [2024-06-27 19:27:24,944 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 451 predicate places. [2024-06-27 19:27:24,944 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 521 transitions, 6452 flow [2024-06-27 19:27:24,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:24,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:24,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:24,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-27 19:27:24,944 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:24,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:24,944 INFO L85 PathProgramCache]: Analyzing trace with hash 614589564, now seen corresponding path program 3 times [2024-06-27 19:27:24,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:24,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943510948] [2024-06-27 19:27:24,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:24,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:24,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:25,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:25,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:25,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943510948] [2024-06-27 19:27:25,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943510948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:25,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:25,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:27:25,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17163080] [2024-06-27 19:27:25,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:25,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:27:25,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:25,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:27:25,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:27:25,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:27:25,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 521 transitions, 6452 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:25,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:25,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:27:25,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:26,453 INFO L124 PetriNetUnfolderBase]: 4055/6790 cut-off events. [2024-06-27 19:27:26,453 INFO L125 PetriNetUnfolderBase]: For 451866/451878 co-relation queries the response was YES. [2024-06-27 19:27:26,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43251 conditions, 6790 events. 4055/6790 cut-off events. For 451866/451878 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 47790 event pairs, 951 based on Foata normal form. 18/6807 useless extension candidates. Maximal degree in co-relation 43048. Up to 5622 conditions per place. [2024-06-27 19:27:26,543 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 450 selfloop transitions, 92 changer transitions 0/549 dead transitions. [2024-06-27 19:27:26,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 549 transitions, 7964 flow [2024-06-27 19:27:26,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:27:26,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:27:26,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-27 19:27:26,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-06-27 19:27:26,544 INFO L175 Difference]: Start difference. First operand has 492 places, 521 transitions, 6452 flow. Second operand 9 states and 203 transitions. [2024-06-27 19:27:26,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 549 transitions, 7964 flow [2024-06-27 19:27:29,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 549 transitions, 7795 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 19:27:29,807 INFO L231 Difference]: Finished difference. Result has 493 places, 522 transitions, 6499 flow [2024-06-27 19:27:29,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6283, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6499, PETRI_PLACES=493, PETRI_TRANSITIONS=522} [2024-06-27 19:27:29,807 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 452 predicate places. [2024-06-27 19:27:29,807 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 522 transitions, 6499 flow [2024-06-27 19:27:29,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:29,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:29,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:29,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2024-06-27 19:27:29,807 INFO L420 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:29,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:29,808 INFO L85 PathProgramCache]: Analyzing trace with hash 614352228, now seen corresponding path program 5 times [2024-06-27 19:27:29,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:29,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016936662] [2024-06-27 19:27:29,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:29,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:29,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:29,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:29,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016936662] [2024-06-27 19:27:29,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016936662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:29,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:29,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:27:29,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706803702] [2024-06-27 19:27:29,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:29,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:27:29,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:29,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:27:29,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:27:29,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:27:29,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 522 transitions, 6499 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:29,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:29,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:27:29,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:31,354 INFO L124 PetriNetUnfolderBase]: 4083/6838 cut-off events. [2024-06-27 19:27:31,354 INFO L125 PetriNetUnfolderBase]: For 459092/459104 co-relation queries the response was YES. [2024-06-27 19:27:31,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43740 conditions, 6838 events. 4083/6838 cut-off events. For 459092/459104 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 48186 event pairs, 901 based on Foata normal form. 18/6855 useless extension candidates. Maximal degree in co-relation 43536. Up to 5795 conditions per place. [2024-06-27 19:27:31,441 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 454 selfloop transitions, 91 changer transitions 0/552 dead transitions. [2024-06-27 19:27:31,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 552 transitions, 7769 flow [2024-06-27 19:27:31,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:27:31,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:27:31,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-27 19:27:31,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5694444444444444 [2024-06-27 19:27:31,442 INFO L175 Difference]: Start difference. First operand has 493 places, 522 transitions, 6499 flow. Second operand 9 states and 205 transitions. [2024-06-27 19:27:31,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 552 transitions, 7769 flow [2024-06-27 19:27:35,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 552 transitions, 7512 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 19:27:35,455 INFO L231 Difference]: Finished difference. Result has 496 places, 525 transitions, 6494 flow [2024-06-27 19:27:35,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6245, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6494, PETRI_PLACES=496, PETRI_TRANSITIONS=525} [2024-06-27 19:27:35,455 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 455 predicate places. [2024-06-27 19:27:35,455 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 525 transitions, 6494 flow [2024-06-27 19:27:35,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:35,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:35,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:35,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2024-06-27 19:27:35,456 INFO L420 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:35,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:35,456 INFO L85 PathProgramCache]: Analyzing trace with hash 614352414, now seen corresponding path program 4 times [2024-06-27 19:27:35,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:35,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660593754] [2024-06-27 19:27:35,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:35,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:35,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:35,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:35,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660593754] [2024-06-27 19:27:35,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660593754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:35,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:35,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:27:35,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164131560] [2024-06-27 19:27:35,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:35,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:27:35,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:35,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:27:35,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:27:35,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:27:35,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 525 transitions, 6494 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:35,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:35,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:27:35,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:36,962 INFO L124 PetriNetUnfolderBase]: 4070/6819 cut-off events. [2024-06-27 19:27:36,963 INFO L125 PetriNetUnfolderBase]: For 411854/411866 co-relation queries the response was YES. [2024-06-27 19:27:37,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42370 conditions, 6819 events. 4070/6819 cut-off events. For 411854/411866 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 48090 event pairs, 929 based on Foata normal form. 18/6836 useless extension candidates. Maximal degree in co-relation 42165. Up to 5652 conditions per place. [2024-06-27 19:27:37,256 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 452 selfloop transitions, 93 changer transitions 0/552 dead transitions. [2024-06-27 19:27:37,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 552 transitions, 7742 flow [2024-06-27 19:27:37,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:27:37,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:27:37,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-27 19:27:37,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-27 19:27:37,257 INFO L175 Difference]: Start difference. First operand has 496 places, 525 transitions, 6494 flow. Second operand 9 states and 204 transitions. [2024-06-27 19:27:37,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 552 transitions, 7742 flow [2024-06-27 19:27:40,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 552 transitions, 7522 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-27 19:27:40,526 INFO L231 Difference]: Finished difference. Result has 498 places, 525 transitions, 6465 flow [2024-06-27 19:27:40,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6274, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6465, PETRI_PLACES=498, PETRI_TRANSITIONS=525} [2024-06-27 19:27:40,526 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 457 predicate places. [2024-06-27 19:27:40,526 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 525 transitions, 6465 flow [2024-06-27 19:27:40,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:40,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:40,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:40,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2024-06-27 19:27:40,527 INFO L420 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:40,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:40,527 INFO L85 PathProgramCache]: Analyzing trace with hash -457237660, now seen corresponding path program 6 times [2024-06-27 19:27:40,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:40,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161529693] [2024-06-27 19:27:40,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:40,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:40,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:40,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:40,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:40,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161529693] [2024-06-27 19:27:40,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161529693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:40,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:40,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:27:40,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704083940] [2024-06-27 19:27:40,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:40,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:27:40,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:40,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:27:40,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:27:40,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:27:40,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 525 transitions, 6465 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:40,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:40,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:27:40,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:42,059 INFO L124 PetriNetUnfolderBase]: 4090/6845 cut-off events. [2024-06-27 19:27:42,059 INFO L125 PetriNetUnfolderBase]: For 411095/411107 co-relation queries the response was YES. [2024-06-27 19:27:42,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42484 conditions, 6845 events. 4090/6845 cut-off events. For 411095/411107 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 48198 event pairs, 1044 based on Foata normal form. 18/6862 useless extension candidates. Maximal degree in co-relation 42279. Up to 6276 conditions per place. [2024-06-27 19:27:42,152 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 501 selfloop transitions, 35 changer transitions 0/543 dead transitions. [2024-06-27 19:27:42,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 543 transitions, 7637 flow [2024-06-27 19:27:42,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:27:42,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:27:42,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-27 19:27:42,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540625 [2024-06-27 19:27:42,153 INFO L175 Difference]: Start difference. First operand has 498 places, 525 transitions, 6465 flow. Second operand 8 states and 173 transitions. [2024-06-27 19:27:42,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 543 transitions, 7637 flow [2024-06-27 19:27:45,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 543 transitions, 7436 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 19:27:45,484 INFO L231 Difference]: Finished difference. Result has 498 places, 526 transitions, 6380 flow [2024-06-27 19:27:45,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6264, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6380, PETRI_PLACES=498, PETRI_TRANSITIONS=526} [2024-06-27 19:27:45,485 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 457 predicate places. [2024-06-27 19:27:45,485 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 526 transitions, 6380 flow [2024-06-27 19:27:45,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:45,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:45,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:45,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2024-06-27 19:27:45,485 INFO L420 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:45,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:45,485 INFO L85 PathProgramCache]: Analyzing trace with hash 379035672, now seen corresponding path program 7 times [2024-06-27 19:27:45,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:45,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730155664] [2024-06-27 19:27:45,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:45,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:45,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:45,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:45,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730155664] [2024-06-27 19:27:45,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730155664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:45,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:45,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:27:45,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830028959] [2024-06-27 19:27:45,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:45,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:27:45,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:45,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:27:45,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:27:45,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:27:45,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 526 transitions, 6380 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:45,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:45,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:27:45,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:46,985 INFO L124 PetriNetUnfolderBase]: 4110/6882 cut-off events. [2024-06-27 19:27:46,985 INFO L125 PetriNetUnfolderBase]: For 412418/412426 co-relation queries the response was YES. [2024-06-27 19:27:47,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42493 conditions, 6882 events. 4110/6882 cut-off events. For 412418/412426 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 48641 event pairs, 1052 based on Foata normal form. 11/6891 useless extension candidates. Maximal degree in co-relation 42287. Up to 5989 conditions per place. [2024-06-27 19:27:47,076 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 445 selfloop transitions, 97 changer transitions 0/549 dead transitions. [2024-06-27 19:27:47,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 549 transitions, 7642 flow [2024-06-27 19:27:47,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:27:47,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:27:47,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-27 19:27:47,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2024-06-27 19:27:47,076 INFO L175 Difference]: Start difference. First operand has 498 places, 526 transitions, 6380 flow. Second operand 8 states and 181 transitions. [2024-06-27 19:27:47,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 549 transitions, 7642 flow [2024-06-27 19:27:49,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 549 transitions, 7514 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 19:27:49,564 INFO L231 Difference]: Finished difference. Result has 499 places, 527 transitions, 6494 flow [2024-06-27 19:27:49,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6252, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6494, PETRI_PLACES=499, PETRI_TRANSITIONS=527} [2024-06-27 19:27:49,564 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 458 predicate places. [2024-06-27 19:27:49,564 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 527 transitions, 6494 flow [2024-06-27 19:27:49,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:49,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:49,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:49,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2024-06-27 19:27:49,565 INFO L420 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:49,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:49,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1458163052, now seen corresponding path program 8 times [2024-06-27 19:27:49,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:49,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072891049] [2024-06-27 19:27:49,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:49,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:49,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:49,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:49,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072891049] [2024-06-27 19:27:49,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072891049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:49,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:49,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:27:49,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941753497] [2024-06-27 19:27:49,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:49,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:27:49,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:49,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:27:49,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:27:49,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:27:49,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 527 transitions, 6494 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:49,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:49,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:27:49,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:51,329 INFO L124 PetriNetUnfolderBase]: 4171/6986 cut-off events. [2024-06-27 19:27:51,330 INFO L125 PetriNetUnfolderBase]: For 476144/476156 co-relation queries the response was YES. [2024-06-27 19:27:51,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44279 conditions, 6986 events. 4171/6986 cut-off events. For 476144/476156 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 49527 event pairs, 969 based on Foata normal form. 18/7003 useless extension candidates. Maximal degree in co-relation 44073. Up to 6246 conditions per place. [2024-06-27 19:27:51,408 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 494 selfloop transitions, 53 changer transitions 0/554 dead transitions. [2024-06-27 19:27:51,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 554 transitions, 8054 flow [2024-06-27 19:27:51,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:27:51,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:27:51,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-27 19:27:51,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5388888888888889 [2024-06-27 19:27:51,409 INFO L175 Difference]: Start difference. First operand has 499 places, 527 transitions, 6494 flow. Second operand 9 states and 194 transitions. [2024-06-27 19:27:51,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 554 transitions, 8054 flow [2024-06-27 19:27:55,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 554 transitions, 7823 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 19:27:55,157 INFO L231 Difference]: Finished difference. Result has 501 places, 531 transitions, 6479 flow [2024-06-27 19:27:55,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6265, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6479, PETRI_PLACES=501, PETRI_TRANSITIONS=531} [2024-06-27 19:27:55,157 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 460 predicate places. [2024-06-27 19:27:55,157 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 531 transitions, 6479 flow [2024-06-27 19:27:55,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:55,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:55,157 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] [2024-06-27 19:27:55,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2024-06-27 19:27:55,158 INFO L420 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:55,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:55,158 INFO L85 PathProgramCache]: Analyzing trace with hash -644023708, now seen corresponding path program 9 times [2024-06-27 19:27:55,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:55,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044231989] [2024-06-27 19:27:55,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:55,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:55,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:55,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:55,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:55,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044231989] [2024-06-27 19:27:55,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044231989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:55,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:55,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:27:55,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157887736] [2024-06-27 19:27:55,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:55,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:27:55,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:55,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:27:55,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:27:55,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:27:55,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 531 transitions, 6479 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:55,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:55,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:27:55,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:56,707 INFO L124 PetriNetUnfolderBase]: 4158/6967 cut-off events. [2024-06-27 19:27:56,707 INFO L125 PetriNetUnfolderBase]: For 419801/419813 co-relation queries the response was YES. [2024-06-27 19:27:56,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43018 conditions, 6967 events. 4158/6967 cut-off events. For 419801/419813 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 49413 event pairs, 967 based on Foata normal form. 18/6984 useless extension candidates. Maximal degree in co-relation 42812. Up to 6312 conditions per place. [2024-06-27 19:27:56,797 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 492 selfloop transitions, 50 changer transitions 0/549 dead transitions. [2024-06-27 19:27:56,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 549 transitions, 7625 flow [2024-06-27 19:27:56,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:27:56,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:27:56,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-27 19:27:56,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-27 19:27:56,797 INFO L175 Difference]: Start difference. First operand has 501 places, 531 transitions, 6479 flow. Second operand 8 states and 174 transitions. [2024-06-27 19:27:56,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 549 transitions, 7625 flow [2024-06-27 19:27:59,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 549 transitions, 7498 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 19:27:59,514 INFO L231 Difference]: Finished difference. Result has 505 places, 531 transitions, 6456 flow [2024-06-27 19:27:59,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6352, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6456, PETRI_PLACES=505, PETRI_TRANSITIONS=531} [2024-06-27 19:27:59,515 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 464 predicate places. [2024-06-27 19:27:59,515 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 531 transitions, 6456 flow [2024-06-27 19:27:59,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:59,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:59,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:59,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2024-06-27 19:27:59,516 INFO L420 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:27:59,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:59,516 INFO L85 PathProgramCache]: Analyzing trace with hash 328462586, now seen corresponding path program 10 times [2024-06-27 19:27:59,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:59,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901963236] [2024-06-27 19:27:59,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:59,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:59,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:59,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:59,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901963236] [2024-06-27 19:27:59,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901963236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:59,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:59,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:27:59,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370846023] [2024-06-27 19:27:59,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:59,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:27:59,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:59,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:27:59,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:27:59,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:27:59,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 531 transitions, 6456 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:59,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:59,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:27:59,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:00,927 INFO L124 PetriNetUnfolderBase]: 4145/6945 cut-off events. [2024-06-27 19:28:00,927 INFO L125 PetriNetUnfolderBase]: For 364766/364774 co-relation queries the response was YES. [2024-06-27 19:28:00,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41785 conditions, 6945 events. 4145/6945 cut-off events. For 364766/364774 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 49022 event pairs, 1025 based on Foata normal form. 11/6954 useless extension candidates. Maximal degree in co-relation 41578. Up to 5226 conditions per place. [2024-06-27 19:28:01,016 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 422 selfloop transitions, 125 changer transitions 0/554 dead transitions. [2024-06-27 19:28:01,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 554 transitions, 7688 flow [2024-06-27 19:28:01,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:28:01,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:28:01,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-27 19:28:01,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2024-06-27 19:28:01,017 INFO L175 Difference]: Start difference. First operand has 505 places, 531 transitions, 6456 flow. Second operand 8 states and 181 transitions. [2024-06-27 19:28:01,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 554 transitions, 7688 flow [2024-06-27 19:28:04,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 554 transitions, 7562 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 19:28:04,114 INFO L231 Difference]: Finished difference. Result has 505 places, 531 transitions, 6584 flow [2024-06-27 19:28:04,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6330, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6584, PETRI_PLACES=505, PETRI_TRANSITIONS=531} [2024-06-27 19:28:04,114 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 464 predicate places. [2024-06-27 19:28:04,114 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 531 transitions, 6584 flow [2024-06-27 19:28:04,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:04,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:04,115 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, 1] [2024-06-27 19:28:04,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2024-06-27 19:28:04,115 INFO L420 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:28:04,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:04,115 INFO L85 PathProgramCache]: Analyzing trace with hash -839813868, now seen corresponding path program 1 times [2024-06-27 19:28:04,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:04,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824174360] [2024-06-27 19:28:04,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:04,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:04,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:04,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:28:04,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:04,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824174360] [2024-06-27 19:28:04,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824174360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:04,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:04,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:28:04,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231738280] [2024-06-27 19:28:04,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:04,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:28:04,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:04,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:28:04,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:28:04,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:28:04,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 531 transitions, 6584 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:04,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:04,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:28:04,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:05,973 INFO L124 PetriNetUnfolderBase]: 4434/7466 cut-off events. [2024-06-27 19:28:05,973 INFO L125 PetriNetUnfolderBase]: For 944983/944991 co-relation queries the response was YES. [2024-06-27 19:28:06,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51665 conditions, 7466 events. 4434/7466 cut-off events. For 944983/944991 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 53325 event pairs, 1057 based on Foata normal form. 26/7490 useless extension candidates. Maximal degree in co-relation 51457. Up to 2793 conditions per place. [2024-06-27 19:28:06,067 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 330 selfloop transitions, 234 changer transitions 16/587 dead transitions. [2024-06-27 19:28:06,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 587 transitions, 8644 flow [2024-06-27 19:28:06,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:28:06,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:28:06,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 267 transitions. [2024-06-27 19:28:06,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6068181818181818 [2024-06-27 19:28:06,068 INFO L175 Difference]: Start difference. First operand has 505 places, 531 transitions, 6584 flow. Second operand 11 states and 267 transitions. [2024-06-27 19:28:06,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 587 transitions, 8644 flow [2024-06-27 19:28:13,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 587 transitions, 8256 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 19:28:13,530 INFO L231 Difference]: Finished difference. Result has 508 places, 528 transitions, 6638 flow [2024-06-27 19:28:13,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6196, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6638, PETRI_PLACES=508, PETRI_TRANSITIONS=528} [2024-06-27 19:28:13,531 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 467 predicate places. [2024-06-27 19:28:13,531 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 528 transitions, 6638 flow [2024-06-27 19:28:13,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:13,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:13,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:28:13,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2024-06-27 19:28:13,531 INFO L420 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:28:13,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:13,531 INFO L85 PathProgramCache]: Analyzing trace with hash 119382632, now seen corresponding path program 2 times [2024-06-27 19:28:13,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:13,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380033050] [2024-06-27 19:28:13,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:13,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:13,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:28:13,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:13,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380033050] [2024-06-27 19:28:13,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380033050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:13,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:13,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:28:13,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975612969] [2024-06-27 19:28:13,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:13,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:28:13,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:13,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:28:13,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:28:13,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:28:13,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 528 transitions, 6638 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:13,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:13,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:28:13,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:15,459 INFO L124 PetriNetUnfolderBase]: 4444/7485 cut-off events. [2024-06-27 19:28:15,459 INFO L125 PetriNetUnfolderBase]: For 1123322/1123334 co-relation queries the response was YES. [2024-06-27 19:28:15,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53624 conditions, 7485 events. 4444/7485 cut-off events. For 1123322/1123334 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 53626 event pairs, 926 based on Foata normal form. 30/7514 useless extension candidates. Maximal degree in co-relation 53417. Up to 5422 conditions per place. [2024-06-27 19:28:15,548 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 433 selfloop transitions, 129 changer transitions 8/577 dead transitions. [2024-06-27 19:28:15,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 577 transitions, 8354 flow [2024-06-27 19:28:15,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:28:15,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:28:15,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 256 transitions. [2024-06-27 19:28:15,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818181818181818 [2024-06-27 19:28:15,549 INFO L175 Difference]: Start difference. First operand has 508 places, 528 transitions, 6638 flow. Second operand 11 states and 256 transitions. [2024-06-27 19:28:15,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 577 transitions, 8354 flow [2024-06-27 19:28:22,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 577 transitions, 7892 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 19:28:22,435 INFO L231 Difference]: Finished difference. Result has 506 places, 526 transitions, 6425 flow [2024-06-27 19:28:22,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6180, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6425, PETRI_PLACES=506, PETRI_TRANSITIONS=526} [2024-06-27 19:28:22,435 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 465 predicate places. [2024-06-27 19:28:22,435 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 526 transitions, 6425 flow [2024-06-27 19:28:22,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:22,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:22,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:28:22,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2024-06-27 19:28:22,435 INFO L420 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:28:22,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:22,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1116196246, now seen corresponding path program 3 times [2024-06-27 19:28:22,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:22,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181080829] [2024-06-27 19:28:22,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:22,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:22,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:28:22,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:22,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181080829] [2024-06-27 19:28:22,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181080829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:22,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:22,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:28:22,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893144168] [2024-06-27 19:28:22,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:22,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:28:22,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:22,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:28:22,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:28:22,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:28:22,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 526 transitions, 6425 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:22,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:22,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:28:22,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:24,245 INFO L124 PetriNetUnfolderBase]: 4212/7077 cut-off events. [2024-06-27 19:28:24,246 INFO L125 PetriNetUnfolderBase]: For 701657/701669 co-relation queries the response was YES. [2024-06-27 19:28:24,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45666 conditions, 7077 events. 4212/7077 cut-off events. For 701657/701669 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 50210 event pairs, 825 based on Foata normal form. 30/7106 useless extension candidates. Maximal degree in co-relation 45460. Up to 5217 conditions per place. [2024-06-27 19:28:24,323 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 418 selfloop transitions, 126 changer transitions 19/570 dead transitions. [2024-06-27 19:28:24,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 570 transitions, 7801 flow [2024-06-27 19:28:24,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:28:24,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:28:24,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 250 transitions. [2024-06-27 19:28:24,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-27 19:28:24,324 INFO L175 Difference]: Start difference. First operand has 506 places, 526 transitions, 6425 flow. Second operand 11 states and 250 transitions. [2024-06-27 19:28:24,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 570 transitions, 7801 flow [2024-06-27 19:28:28,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 570 transitions, 7540 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 19:28:28,770 INFO L231 Difference]: Finished difference. Result has 505 places, 522 transitions, 6369 flow [2024-06-27 19:28:28,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6164, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6369, PETRI_PLACES=505, PETRI_TRANSITIONS=522} [2024-06-27 19:28:28,771 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 464 predicate places. [2024-06-27 19:28:28,771 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 522 transitions, 6369 flow [2024-06-27 19:28:28,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:28,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:28,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:28:28,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2024-06-27 19:28:28,771 INFO L420 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:28:28,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:28,771 INFO L85 PathProgramCache]: Analyzing trace with hash 263480552, now seen corresponding path program 4 times [2024-06-27 19:28:28,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:28,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589268020] [2024-06-27 19:28:28,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:28,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:28,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:28:28,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:28,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589268020] [2024-06-27 19:28:28,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589268020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:28,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:28,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:28:28,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209515677] [2024-06-27 19:28:28,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:28,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:28:28,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:28,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:28:28,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:28:28,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:28:28,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 522 transitions, 6369 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:28,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:28,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:28:28,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:30,494 INFO L124 PetriNetUnfolderBase]: 4333/7298 cut-off events. [2024-06-27 19:28:30,494 INFO L125 PetriNetUnfolderBase]: For 1019541/1019553 co-relation queries the response was YES. [2024-06-27 19:28:30,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51397 conditions, 7298 events. 4333/7298 cut-off events. For 1019541/1019553 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 51962 event pairs, 933 based on Foata normal form. 30/7327 useless extension candidates. Maximal degree in co-relation 51192. Up to 5061 conditions per place. [2024-06-27 19:28:30,591 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 428 selfloop transitions, 125 changer transitions 13/573 dead transitions. [2024-06-27 19:28:30,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 573 transitions, 8071 flow [2024-06-27 19:28:30,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 19:28:30,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 19:28:30,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 287 transitions. [2024-06-27 19:28:30,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551923076923077 [2024-06-27 19:28:30,592 INFO L175 Difference]: Start difference. First operand has 505 places, 522 transitions, 6369 flow. Second operand 13 states and 287 transitions. [2024-06-27 19:28:30,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 573 transitions, 8071 flow [2024-06-27 19:28:37,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 573 transitions, 7792 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-27 19:28:37,065 INFO L231 Difference]: Finished difference. Result has 501 places, 519 transitions, 6304 flow [2024-06-27 19:28:37,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6092, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6304, PETRI_PLACES=501, PETRI_TRANSITIONS=519} [2024-06-27 19:28:37,066 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 460 predicate places. [2024-06-27 19:28:37,066 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 519 transitions, 6304 flow [2024-06-27 19:28:37,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:37,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:37,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:28:37,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2024-06-27 19:28:37,066 INFO L420 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:28:37,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:37,066 INFO L85 PathProgramCache]: Analyzing trace with hash 263273162, now seen corresponding path program 5 times [2024-06-27 19:28:37,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:37,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354689149] [2024-06-27 19:28:37,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:37,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:37,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:28:37,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:37,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354689149] [2024-06-27 19:28:37,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354689149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:37,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:37,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:28:37,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687188811] [2024-06-27 19:28:37,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:37,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:28:37,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:37,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:28:37,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:28:37,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:28:37,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 519 transitions, 6304 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:37,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:37,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:28:37,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:38,703 INFO L124 PetriNetUnfolderBase]: 4289/7234 cut-off events. [2024-06-27 19:28:38,703 INFO L125 PetriNetUnfolderBase]: For 1019020/1019032 co-relation queries the response was YES. [2024-06-27 19:28:38,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50872 conditions, 7234 events. 4289/7234 cut-off events. For 1019020/1019032 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 51503 event pairs, 941 based on Foata normal form. 30/7263 useless extension candidates. Maximal degree in co-relation 50668. Up to 5061 conditions per place. [2024-06-27 19:28:38,797 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 437 selfloop transitions, 119 changer transitions 8/571 dead transitions. [2024-06-27 19:28:38,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 571 transitions, 8298 flow [2024-06-27 19:28:38,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:28:38,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:28:38,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 274 transitions. [2024-06-27 19:28:38,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2024-06-27 19:28:38,798 INFO L175 Difference]: Start difference. First operand has 501 places, 519 transitions, 6304 flow. Second operand 12 states and 274 transitions. [2024-06-27 19:28:38,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 571 transitions, 8298 flow [2024-06-27 19:28:46,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 571 transitions, 8048 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-27 19:28:46,983 INFO L231 Difference]: Finished difference. Result has 499 places, 517 transitions, 6282 flow [2024-06-27 19:28:46,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6058, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6282, PETRI_PLACES=499, PETRI_TRANSITIONS=517} [2024-06-27 19:28:46,984 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 458 predicate places. [2024-06-27 19:28:46,984 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 517 transitions, 6282 flow [2024-06-27 19:28:46,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:46,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:46,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:28:46,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2024-06-27 19:28:46,984 INFO L420 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:28:46,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:46,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1315498036, now seen corresponding path program 6 times [2024-06-27 19:28:46,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:46,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74225007] [2024-06-27 19:28:46,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:46,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:46,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:47,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:28:47,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:47,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74225007] [2024-06-27 19:28:47,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74225007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:47,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:47,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:28:47,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623874131] [2024-06-27 19:28:47,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:47,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:28:47,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:47,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:28:47,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:28:47,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:28:47,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 517 transitions, 6282 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:47,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:47,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:28:47,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:48,724 INFO L124 PetriNetUnfolderBase]: 4184/7043 cut-off events. [2024-06-27 19:28:48,725 INFO L125 PetriNetUnfolderBase]: For 857158/857170 co-relation queries the response was YES. [2024-06-27 19:28:48,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47630 conditions, 7043 events. 4184/7043 cut-off events. For 857158/857170 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 49867 event pairs, 965 based on Foata normal form. 30/7072 useless extension candidates. Maximal degree in co-relation 47426. Up to 5061 conditions per place. [2024-06-27 19:28:48,806 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 422 selfloop transitions, 115 changer transitions 20/564 dead transitions. [2024-06-27 19:28:48,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 564 transitions, 7940 flow [2024-06-27 19:28:48,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:28:48,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:28:48,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 268 transitions. [2024-06-27 19:28:48,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-27 19:28:48,807 INFO L175 Difference]: Start difference. First operand has 499 places, 517 transitions, 6282 flow. Second operand 12 states and 268 transitions. [2024-06-27 19:28:48,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 564 transitions, 7940 flow [2024-06-27 19:28:54,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 564 transitions, 7699 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-27 19:28:54,037 INFO L231 Difference]: Finished difference. Result has 499 places, 512 transitions, 6198 flow [2024-06-27 19:28:54,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6045, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6198, PETRI_PLACES=499, PETRI_TRANSITIONS=512} [2024-06-27 19:28:54,037 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 458 predicate places. [2024-06-27 19:28:54,037 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 512 transitions, 6198 flow [2024-06-27 19:28:54,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:54,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:54,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:28:54,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2024-06-27 19:28:54,038 INFO L420 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:28:54,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:54,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1578527852, now seen corresponding path program 7 times [2024-06-27 19:28:54,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:54,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16817720] [2024-06-27 19:28:54,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:54,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:54,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:54,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:28:54,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:54,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16817720] [2024-06-27 19:28:54,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16817720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:54,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:54,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:28:54,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892395189] [2024-06-27 19:28:54,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:54,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:28:54,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:54,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:28:54,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:28:54,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:28:54,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 512 transitions, 6198 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:54,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:54,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:28:54,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:55,923 INFO L124 PetriNetUnfolderBase]: 4285/7200 cut-off events. [2024-06-27 19:28:55,924 INFO L125 PetriNetUnfolderBase]: For 1132571/1132579 co-relation queries the response was YES. [2024-06-27 19:28:55,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51947 conditions, 7200 events. 4285/7200 cut-off events. For 1132571/1132579 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 51298 event pairs, 1238 based on Foata normal form. 32/7230 useless extension candidates. Maximal degree in co-relation 51744. Up to 5632 conditions per place. [2024-06-27 19:28:56,003 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 309 selfloop transitions, 223 changer transitions 19/558 dead transitions. [2024-06-27 19:28:56,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 558 transitions, 7838 flow [2024-06-27 19:28:56,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 19:28:56,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 19:28:56,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 292 transitions. [2024-06-27 19:28:56,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5615384615384615 [2024-06-27 19:28:56,004 INFO L175 Difference]: Start difference. First operand has 499 places, 512 transitions, 6198 flow. Second operand 13 states and 292 transitions. [2024-06-27 19:28:56,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 558 transitions, 7838 flow [2024-06-27 19:29:03,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 558 transitions, 7490 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-27 19:29:03,993 INFO L231 Difference]: Finished difference. Result has 493 places, 508 transitions, 6251 flow [2024-06-27 19:29:03,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5852, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6251, PETRI_PLACES=493, PETRI_TRANSITIONS=508} [2024-06-27 19:29:03,993 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 452 predicate places. [2024-06-27 19:29:03,993 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 508 transitions, 6251 flow [2024-06-27 19:29:03,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:03,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:03,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:29:03,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2024-06-27 19:29:03,994 INFO L420 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:29:03,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:03,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1468299978, now seen corresponding path program 8 times [2024-06-27 19:29:03,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:03,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339963059] [2024-06-27 19:29:03,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:03,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:03,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:29:04,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:04,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339963059] [2024-06-27 19:29:04,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339963059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:04,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:04,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:29:04,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720223709] [2024-06-27 19:29:04,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:04,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:29:04,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:04,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:29:04,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:29:04,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:29:04,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 508 transitions, 6251 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:04,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:04,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:29:04,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:05,690 INFO L124 PetriNetUnfolderBase]: 4364/7368 cut-off events. [2024-06-27 19:29:05,690 INFO L125 PetriNetUnfolderBase]: For 1445978/1445986 co-relation queries the response was YES. [2024-06-27 19:29:05,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57905 conditions, 7368 events. 4364/7368 cut-off events. For 1445978/1445986 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 52871 event pairs, 1213 based on Foata normal form. 26/7392 useless extension candidates. Maximal degree in co-relation 57704. Up to 4899 conditions per place. [2024-06-27 19:29:05,796 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 308 selfloop transitions, 227 changer transitions 16/558 dead transitions. [2024-06-27 19:29:05,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 558 transitions, 8187 flow [2024-06-27 19:29:05,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:29:05,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:29:05,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 280 transitions. [2024-06-27 19:29:05,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-27 19:29:05,797 INFO L175 Difference]: Start difference. First operand has 493 places, 508 transitions, 6251 flow. Second operand 12 states and 280 transitions. [2024-06-27 19:29:05,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 558 transitions, 8187 flow [2024-06-27 19:29:17,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 558 transitions, 7767 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-27 19:29:17,865 INFO L231 Difference]: Finished difference. Result has 490 places, 505 transitions, 6268 flow [2024-06-27 19:29:17,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5839, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6268, PETRI_PLACES=490, PETRI_TRANSITIONS=505} [2024-06-27 19:29:17,865 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 449 predicate places. [2024-06-27 19:29:17,865 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 505 transitions, 6268 flow [2024-06-27 19:29:17,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:17,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:17,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:29:17,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2024-06-27 19:29:17,866 INFO L420 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:29:17,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:17,866 INFO L85 PathProgramCache]: Analyzing trace with hash 111657814, now seen corresponding path program 9 times [2024-06-27 19:29:17,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:17,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481409507] [2024-06-27 19:29:17,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:17,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:17,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:17,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:29:17,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:17,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481409507] [2024-06-27 19:29:17,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481409507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:17,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:17,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:29:17,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554483003] [2024-06-27 19:29:17,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:17,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:29:17,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:17,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:29:17,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:29:18,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:29:18,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 505 transitions, 6268 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:18,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:18,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:29:18,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:19,541 INFO L124 PetriNetUnfolderBase]: 4293/7230 cut-off events. [2024-06-27 19:29:19,541 INFO L125 PetriNetUnfolderBase]: For 1428089/1428101 co-relation queries the response was YES. [2024-06-27 19:29:19,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57480 conditions, 7230 events. 4293/7230 cut-off events. For 1428089/1428101 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 51587 event pairs, 1220 based on Foata normal form. 30/7259 useless extension candidates. Maximal degree in co-relation 57280. Up to 5992 conditions per place. [2024-06-27 19:29:19,638 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 435 selfloop transitions, 100 changer transitions 12/554 dead transitions. [2024-06-27 19:29:19,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 554 transitions, 7902 flow [2024-06-27 19:29:19,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 19:29:19,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 19:29:19,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 302 transitions. [2024-06-27 19:29:19,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392857142857143 [2024-06-27 19:29:19,639 INFO L175 Difference]: Start difference. First operand has 490 places, 505 transitions, 6268 flow. Second operand 14 states and 302 transitions. [2024-06-27 19:29:19,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 554 transitions, 7902 flow [2024-06-27 19:29:29,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 554 transitions, 7454 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-27 19:29:29,561 INFO L231 Difference]: Finished difference. Result has 490 places, 503 transitions, 6000 flow [2024-06-27 19:29:29,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5824, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6000, PETRI_PLACES=490, PETRI_TRANSITIONS=503} [2024-06-27 19:29:29,562 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 449 predicate places. [2024-06-27 19:29:29,562 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 503 transitions, 6000 flow [2024-06-27 19:29:29,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:29,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:29,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:29:29,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2024-06-27 19:29:29,562 INFO L420 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:29:29,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:29,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1472019048, now seen corresponding path program 10 times [2024-06-27 19:29:29,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:29,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120946721] [2024-06-27 19:29:29,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:29,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:29,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:29,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:29:29,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:29,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120946721] [2024-06-27 19:29:29,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120946721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:29,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:29,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:29:29,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903189201] [2024-06-27 19:29:29,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:29,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:29:29,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:29,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:29:29,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:29:29,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:29:29,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 503 transitions, 6000 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:29,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:29,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:29:29,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:31,197 INFO L124 PetriNetUnfolderBase]: 4188/7043 cut-off events. [2024-06-27 19:29:31,198 INFO L125 PetriNetUnfolderBase]: For 1250423/1250435 co-relation queries the response was YES. [2024-06-27 19:29:31,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53942 conditions, 7043 events. 4188/7043 cut-off events. For 1250423/1250435 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 49985 event pairs, 1208 based on Foata normal form. 30/7072 useless extension candidates. Maximal degree in co-relation 53743. Up to 5992 conditions per place. [2024-06-27 19:29:31,289 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 419 selfloop transitions, 96 changer transitions 19/541 dead transitions. [2024-06-27 19:29:31,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 541 transitions, 7256 flow [2024-06-27 19:29:31,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:29:31,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:29:31,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 261 transitions. [2024-06-27 19:29:31,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-27 19:29:31,290 INFO L175 Difference]: Start difference. First operand has 490 places, 503 transitions, 6000 flow. Second operand 12 states and 261 transitions. [2024-06-27 19:29:31,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 541 transitions, 7256 flow [2024-06-27 19:29:41,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 541 transitions, 7026 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-06-27 19:29:41,102 INFO L231 Difference]: Finished difference. Result has 487 places, 499 transitions, 5920 flow [2024-06-27 19:29:41,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5770, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5920, PETRI_PLACES=487, PETRI_TRANSITIONS=499} [2024-06-27 19:29:41,102 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 446 predicate places. [2024-06-27 19:29:41,102 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 499 transitions, 5920 flow [2024-06-27 19:29:41,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:41,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:41,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:29:41,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2024-06-27 19:29:41,103 INFO L420 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:29:41,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:41,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1844551562, now seen corresponding path program 11 times [2024-06-27 19:29:41,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:41,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15953935] [2024-06-27 19:29:41,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:41,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:41,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:41,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:29:41,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:41,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15953935] [2024-06-27 19:29:41,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15953935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:41,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:41,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:29:41,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130683557] [2024-06-27 19:29:41,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:41,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:29:41,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:41,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:29:41,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:29:41,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:29:41,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 499 transitions, 5920 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:41,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:41,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:29:41,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:42,738 INFO L124 PetriNetUnfolderBase]: 4180/7034 cut-off events. [2024-06-27 19:29:42,738 INFO L125 PetriNetUnfolderBase]: For 1317553/1317561 co-relation queries the response was YES. [2024-06-27 19:29:42,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53935 conditions, 7034 events. 4180/7034 cut-off events. For 1317553/1317561 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 50069 event pairs, 1319 based on Foata normal form. 34/7066 useless extension candidates. Maximal degree in co-relation 53736. Up to 6058 conditions per place. [2024-06-27 19:29:42,826 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 293 selfloop transitions, 219 changer transitions 12/531 dead transitions. [2024-06-27 19:29:42,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 531 transitions, 7104 flow [2024-06-27 19:29:42,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 19:29:42,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 19:29:42,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 281 transitions. [2024-06-27 19:29:42,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5403846153846154 [2024-06-27 19:29:42,827 INFO L175 Difference]: Start difference. First operand has 487 places, 499 transitions, 5920 flow. Second operand 13 states and 281 transitions. [2024-06-27 19:29:42,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 531 transitions, 7104 flow [2024-06-27 19:29:52,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 531 transitions, 6906 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-27 19:29:52,935 INFO L231 Difference]: Finished difference. Result has 482 places, 495 transitions, 6137 flow [2024-06-27 19:29:52,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5722, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6137, PETRI_PLACES=482, PETRI_TRANSITIONS=495} [2024-06-27 19:29:52,935 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 441 predicate places. [2024-06-27 19:29:52,935 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 495 transitions, 6137 flow [2024-06-27 19:29:52,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:52,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:52,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:29:52,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221 [2024-06-27 19:29:52,936 INFO L420 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:29:52,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:52,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1844225132, now seen corresponding path program 12 times [2024-06-27 19:29:52,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:52,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901495864] [2024-06-27 19:29:52,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:52,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:52,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:53,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:29:53,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:53,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901495864] [2024-06-27 19:29:53,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901495864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:53,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:53,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:29:53,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250739158] [2024-06-27 19:29:53,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:53,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:29:53,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:53,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:29:53,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:29:53,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:29:53,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 495 transitions, 6137 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:53,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:53,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:29:53,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:54,625 INFO L124 PetriNetUnfolderBase]: 4165/7023 cut-off events. [2024-06-27 19:29:54,625 INFO L125 PetriNetUnfolderBase]: For 1280538/1280546 co-relation queries the response was YES. [2024-06-27 19:29:54,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53825 conditions, 7023 events. 4165/7023 cut-off events. For 1280538/1280546 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 50132 event pairs, 1281 based on Foata normal form. 32/7053 useless extension candidates. Maximal degree in co-relation 53628. Up to 6010 conditions per place. [2024-06-27 19:29:54,712 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 288 selfloop transitions, 215 changer transitions 21/531 dead transitions. [2024-06-27 19:29:54,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 531 transitions, 7369 flow [2024-06-27 19:29:54,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 19:29:54,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 19:29:54,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 282 transitions. [2024-06-27 19:29:54,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5423076923076923 [2024-06-27 19:29:54,713 INFO L175 Difference]: Start difference. First operand has 482 places, 495 transitions, 6137 flow. Second operand 13 states and 282 transitions. [2024-06-27 19:29:54,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 531 transitions, 7369 flow [2024-06-27 19:30:05,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 531 transitions, 6927 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-27 19:30:05,818 INFO L231 Difference]: Finished difference. Result has 480 places, 490 transitions, 6074 flow [2024-06-27 19:30:05,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5695, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6074, PETRI_PLACES=480, PETRI_TRANSITIONS=490} [2024-06-27 19:30:05,819 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 439 predicate places. [2024-06-27 19:30:05,819 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 490 transitions, 6074 flow [2024-06-27 19:30:05,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:05,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:05,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:30:05,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2024-06-27 19:30:05,819 INFO L420 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:30:05,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:05,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1123284106, now seen corresponding path program 13 times [2024-06-27 19:30:05,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:05,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543800764] [2024-06-27 19:30:05,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:05,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:05,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:30:05,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:05,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543800764] [2024-06-27 19:30:05,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543800764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:05,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:05,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:30:05,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803455630] [2024-06-27 19:30:05,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:05,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:30:05,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:05,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:30:05,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:30:06,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:30:06,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 490 transitions, 6074 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:06,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:06,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:30:06,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:30:07,569 INFO L124 PetriNetUnfolderBase]: 4255/7152 cut-off events. [2024-06-27 19:30:07,569 INFO L125 PetriNetUnfolderBase]: For 1483734/1483746 co-relation queries the response was YES. [2024-06-27 19:30:07,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57886 conditions, 7152 events. 4255/7152 cut-off events. For 1483734/1483746 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 51031 event pairs, 1327 based on Foata normal form. 36/7187 useless extension candidates. Maximal degree in co-relation 57690. Up to 6136 conditions per place. [2024-06-27 19:30:07,653 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 419 selfloop transitions, 90 changer transitions 10/526 dead transitions. [2024-06-27 19:30:07,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 526 transitions, 7578 flow [2024-06-27 19:30:07,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 19:30:07,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 19:30:07,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 279 transitions. [2024-06-27 19:30:07,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365384615384615 [2024-06-27 19:30:07,654 INFO L175 Difference]: Start difference. First operand has 480 places, 490 transitions, 6074 flow. Second operand 13 states and 279 transitions. [2024-06-27 19:30:07,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 526 transitions, 7578 flow [2024-06-27 19:30:17,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 526 transitions, 7132 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-06-27 19:30:17,677 INFO L231 Difference]: Finished difference. Result has 475 places, 487 transitions, 5766 flow [2024-06-27 19:30:17,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5634, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5766, PETRI_PLACES=475, PETRI_TRANSITIONS=487} [2024-06-27 19:30:17,678 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 434 predicate places. [2024-06-27 19:30:17,678 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 487 transitions, 5766 flow [2024-06-27 19:30:17,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:17,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:17,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:30:17,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2024-06-27 19:30:17,678 INFO L420 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:30:17,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:17,679 INFO L85 PathProgramCache]: Analyzing trace with hash -402637474, now seen corresponding path program 14 times [2024-06-27 19:30:17,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:17,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270396696] [2024-06-27 19:30:17,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:17,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:17,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:17,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:30:17,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:17,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270396696] [2024-06-27 19:30:17,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270396696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:17,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:17,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:30:17,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093955936] [2024-06-27 19:30:17,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:17,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:30:17,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:17,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:30:17,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:30:17,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:30:17,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 487 transitions, 5766 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:17,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:17,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:30:17,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:30:19,487 INFO L124 PetriNetUnfolderBase]: 4398/7411 cut-off events. [2024-06-27 19:30:19,487 INFO L125 PetriNetUnfolderBase]: For 1739003/1739015 co-relation queries the response was YES. [2024-06-27 19:30:19,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63800 conditions, 7411 events. 4398/7411 cut-off events. For 1739003/1739015 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 53375 event pairs, 1417 based on Foata normal form. 30/7440 useless extension candidates. Maximal degree in co-relation 63606. Up to 6010 conditions per place. [2024-06-27 19:30:19,576 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 423 selfloop transitions, 91 changer transitions 8/529 dead transitions. [2024-06-27 19:30:19,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 529 transitions, 7560 flow [2024-06-27 19:30:19,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 19:30:19,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 19:30:19,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 301 transitions. [2024-06-27 19:30:19,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-27 19:30:19,577 INFO L175 Difference]: Start difference. First operand has 475 places, 487 transitions, 5766 flow. Second operand 14 states and 301 transitions. [2024-06-27 19:30:19,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 529 transitions, 7560 flow [2024-06-27 19:30:27,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 529 transitions, 7372 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-27 19:30:27,378 INFO L231 Difference]: Finished difference. Result has 475 places, 485 transitions, 5737 flow [2024-06-27 19:30:27,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5582, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5737, PETRI_PLACES=475, PETRI_TRANSITIONS=485} [2024-06-27 19:30:27,378 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 434 predicate places. [2024-06-27 19:30:27,378 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 485 transitions, 5737 flow [2024-06-27 19:30:27,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:27,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:27,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:30:27,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2024-06-27 19:30:27,379 INFO L420 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:30:27,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:27,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1123610536, now seen corresponding path program 15 times [2024-06-27 19:30:27,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:27,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427217096] [2024-06-27 19:30:27,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:27,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:27,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:27,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:30:27,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:27,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427217096] [2024-06-27 19:30:27,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427217096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:27,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:27,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:30:27,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22192813] [2024-06-27 19:30:27,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:27,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:30:27,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:27,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:30:27,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:30:27,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:30:27,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 485 transitions, 5737 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:27,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:27,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:30:27,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:30:29,254 INFO L124 PetriNetUnfolderBase]: 4402/7421 cut-off events. [2024-06-27 19:30:29,254 INFO L125 PetriNetUnfolderBase]: For 1806480/1806492 co-relation queries the response was YES. [2024-06-27 19:30:29,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63892 conditions, 7421 events. 4402/7421 cut-off events. For 1806480/1806492 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 53514 event pairs, 1526 based on Foata normal form. 38/7458 useless extension candidates. Maximal degree in co-relation 63698. Up to 6632 conditions per place. [2024-06-27 19:30:29,342 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 408 selfloop transitions, 86 changer transitions 13/514 dead transitions. [2024-06-27 19:30:29,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 514 transitions, 6879 flow [2024-06-27 19:30:29,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 19:30:29,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 19:30:29,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 274 transitions. [2024-06-27 19:30:29,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5269230769230769 [2024-06-27 19:30:29,343 INFO L175 Difference]: Start difference. First operand has 475 places, 485 transitions, 5737 flow. Second operand 13 states and 274 transitions. [2024-06-27 19:30:29,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 514 transitions, 6879 flow [2024-06-27 19:30:37,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 514 transitions, 6694 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-27 19:30:37,411 INFO L231 Difference]: Finished difference. Result has 474 places, 480 transitions, 5671 flow [2024-06-27 19:30:37,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5552, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5671, PETRI_PLACES=474, PETRI_TRANSITIONS=480} [2024-06-27 19:30:37,411 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 433 predicate places. [2024-06-27 19:30:37,411 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 480 transitions, 5671 flow [2024-06-27 19:30:37,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:37,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:37,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:30:37,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2024-06-27 19:30:37,411 INFO L420 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:30:37,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:37,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1118700136, now seen corresponding path program 16 times [2024-06-27 19:30:37,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:37,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368782699] [2024-06-27 19:30:37,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:37,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:37,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:30:37,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:37,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368782699] [2024-06-27 19:30:37,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368782699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:37,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:37,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:30:37,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87810224] [2024-06-27 19:30:37,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:37,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:30:37,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:37,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:30:37,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:30:37,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:30:37,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 480 transitions, 5671 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:37,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:37,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:30:37,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:30:39,042 INFO L124 PetriNetUnfolderBase]: 4285/7214 cut-off events. [2024-06-27 19:30:39,042 INFO L125 PetriNetUnfolderBase]: For 1588738/1588750 co-relation queries the response was YES. [2024-06-27 19:30:39,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60474 conditions, 7214 events. 4285/7214 cut-off events. For 1588738/1588750 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 51596 event pairs, 1327 based on Foata normal form. 30/7243 useless extension candidates. Maximal degree in co-relation 60280. Up to 6010 conditions per place. [2024-06-27 19:30:39,317 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 421 selfloop transitions, 86 changer transitions 9/523 dead transitions. [2024-06-27 19:30:39,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 523 transitions, 7477 flow [2024-06-27 19:30:39,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 19:30:39,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 19:30:39,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 299 transitions. [2024-06-27 19:30:39,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5339285714285714 [2024-06-27 19:30:39,318 INFO L175 Difference]: Start difference. First operand has 474 places, 480 transitions, 5671 flow. Second operand 14 states and 299 transitions. [2024-06-27 19:30:39,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 523 transitions, 7477 flow [2024-06-27 19:30:50,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 523 transitions, 7293 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-27 19:30:50,073 INFO L231 Difference]: Finished difference. Result has 472 places, 477 transitions, 5626 flow [2024-06-27 19:30:50,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5491, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5626, PETRI_PLACES=472, PETRI_TRANSITIONS=477} [2024-06-27 19:30:50,073 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 431 predicate places. [2024-06-27 19:30:50,073 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 477 transitions, 5626 flow [2024-06-27 19:30:50,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:50,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:50,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:30:50,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2024-06-27 19:30:50,074 INFO L420 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:30:50,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:50,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1128825046, now seen corresponding path program 17 times [2024-06-27 19:30:50,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:50,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781245311] [2024-06-27 19:30:50,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:50,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:50,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:50,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:30:50,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:50,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781245311] [2024-06-27 19:30:50,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781245311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:50,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:50,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:30:50,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104341095] [2024-06-27 19:30:50,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:50,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:30:50,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:50,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:30:50,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:30:50,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:30:50,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 477 transitions, 5626 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:50,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:50,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:30:50,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:30:51,890 INFO L124 PetriNetUnfolderBase]: 4165/7014 cut-off events. [2024-06-27 19:30:51,891 INFO L125 PetriNetUnfolderBase]: For 1439546/1439558 co-relation queries the response was YES. [2024-06-27 19:30:51,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56401 conditions, 7014 events. 4165/7014 cut-off events. For 1439546/1439558 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 49938 event pairs, 1321 based on Foata normal form. 36/7049 useless extension candidates. Maximal degree in co-relation 56208. Up to 6010 conditions per place. [2024-06-27 19:30:51,968 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 413 selfloop transitions, 83 changer transitions 10/513 dead transitions. [2024-06-27 19:30:51,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 513 transitions, 7100 flow [2024-06-27 19:30:51,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 19:30:51,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 19:30:51,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 276 transitions. [2024-06-27 19:30:51,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5307692307692308 [2024-06-27 19:30:51,969 INFO L175 Difference]: Start difference. First operand has 472 places, 477 transitions, 5626 flow. Second operand 13 states and 276 transitions. [2024-06-27 19:30:51,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 513 transitions, 7100 flow [2024-06-27 19:31:00,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 513 transitions, 6921 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-27 19:31:00,840 INFO L231 Difference]: Finished difference. Result has 468 places, 474 transitions, 5571 flow [2024-06-27 19:31:00,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5449, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5571, PETRI_PLACES=468, PETRI_TRANSITIONS=474} [2024-06-27 19:31:00,841 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 427 predicate places. [2024-06-27 19:31:00,841 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 474 transitions, 5571 flow [2024-06-27 19:31:00,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:00,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:00,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:00,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227 [2024-06-27 19:31:00,841 INFO L420 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:00,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:00,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1128972916, now seen corresponding path program 18 times [2024-06-27 19:31:00,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:00,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880337760] [2024-06-27 19:31:00,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:00,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:00,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:00,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:00,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:00,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880337760] [2024-06-27 19:31:00,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880337760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:00,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:00,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:31:00,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624558007] [2024-06-27 19:31:00,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:00,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:31:00,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:00,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:31:00,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:31:01,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:31:01,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 474 transitions, 5571 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:01,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:01,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:31:01,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:02,341 INFO L124 PetriNetUnfolderBase]: 4014/6745 cut-off events. [2024-06-27 19:31:02,341 INFO L125 PetriNetUnfolderBase]: For 1243851/1243863 co-relation queries the response was YES. [2024-06-27 19:31:02,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51564 conditions, 6745 events. 4014/6745 cut-off events. For 1243851/1243863 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 47598 event pairs, 1266 based on Foata normal form. 38/6782 useless extension candidates. Maximal degree in co-relation 51372. Up to 6010 conditions per place. [2024-06-27 19:31:02,427 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 399 selfloop transitions, 76 changer transitions 20/502 dead transitions. [2024-06-27 19:31:02,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 502 transitions, 6687 flow [2024-06-27 19:31:02,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:31:02,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:31:02,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 251 transitions. [2024-06-27 19:31:02,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5229166666666667 [2024-06-27 19:31:02,428 INFO L175 Difference]: Start difference. First operand has 468 places, 474 transitions, 5571 flow. Second operand 12 states and 251 transitions. [2024-06-27 19:31:02,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 502 transitions, 6687 flow [2024-06-27 19:31:09,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 502 transitions, 6464 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-27 19:31:09,631 INFO L231 Difference]: Finished difference. Result has 465 places, 467 transitions, 5424 flow [2024-06-27 19:31:09,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5348, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5424, PETRI_PLACES=465, PETRI_TRANSITIONS=467} [2024-06-27 19:31:09,632 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 424 predicate places. [2024-06-27 19:31:09,632 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 467 transitions, 5424 flow [2024-06-27 19:31:09,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:09,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:09,632 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, 1] [2024-06-27 19:31:09,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228 [2024-06-27 19:31:09,632 INFO L420 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:09,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:09,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1085791638, now seen corresponding path program 19 times [2024-06-27 19:31:09,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:09,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110174950] [2024-06-27 19:31:09,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:09,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:09,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:09,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:09,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:09,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110174950] [2024-06-27 19:31:09,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110174950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:09,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:09,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:31:09,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46636317] [2024-06-27 19:31:09,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:09,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:31:09,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:09,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:31:09,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:31:09,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:31:09,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 467 transitions, 5424 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:09,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:09,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:31:09,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:11,523 INFO L124 PetriNetUnfolderBase]: 4845/8197 cut-off events. [2024-06-27 19:31:11,523 INFO L125 PetriNetUnfolderBase]: For 2687665/2687676 co-relation queries the response was YES. [2024-06-27 19:31:11,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82267 conditions, 8197 events. 4845/8197 cut-off events. For 2687665/2687676 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 60346 event pairs, 1614 based on Foata normal form. 29/8225 useless extension candidates. Maximal degree in co-relation 82076. Up to 5317 conditions per place. [2024-06-27 19:31:11,636 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 389 selfloop transitions, 100 changer transitions 13/509 dead transitions. [2024-06-27 19:31:11,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 509 transitions, 7220 flow [2024-06-27 19:31:11,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 19:31:11,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 19:31:11,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 285 transitions. [2024-06-27 19:31:11,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5480769230769231 [2024-06-27 19:31:11,637 INFO L175 Difference]: Start difference. First operand has 465 places, 467 transitions, 5424 flow. Second operand 13 states and 285 transitions. [2024-06-27 19:31:11,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 509 transitions, 7220 flow [2024-06-27 19:31:22,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 509 transitions, 7038 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-27 19:31:22,810 INFO L231 Difference]: Finished difference. Result has 458 places, 464 transitions, 5397 flow [2024-06-27 19:31:22,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5246, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5397, PETRI_PLACES=458, PETRI_TRANSITIONS=464} [2024-06-27 19:31:22,810 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 417 predicate places. [2024-06-27 19:31:22,810 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 464 transitions, 5397 flow [2024-06-27 19:31:22,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:22,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:22,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:22,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229 [2024-06-27 19:31:22,811 INFO L420 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:22,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:22,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1292052726, now seen corresponding path program 20 times [2024-06-27 19:31:22,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:22,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808812122] [2024-06-27 19:31:22,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:22,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:22,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:22,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808812122] [2024-06-27 19:31:22,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808812122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:22,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:22,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:31:22,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133679478] [2024-06-27 19:31:22,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:22,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:31:22,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:22,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:31:22,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:31:22,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:31:22,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 464 transitions, 5397 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:22,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:22,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:31:22,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:24,939 INFO L124 PetriNetUnfolderBase]: 4801/8115 cut-off events. [2024-06-27 19:31:24,939 INFO L125 PetriNetUnfolderBase]: For 2689132/2689143 co-relation queries the response was YES. [2024-06-27 19:31:25,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81914 conditions, 8115 events. 4801/8115 cut-off events. For 2689132/2689143 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 59483 event pairs, 1701 based on Foata normal form. 29/8143 useless extension candidates. Maximal degree in co-relation 81724. Up to 5317 conditions per place. [2024-06-27 19:31:25,039 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 396 selfloop transitions, 96 changer transitions 8/507 dead transitions. [2024-06-27 19:31:25,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 507 transitions, 7213 flow [2024-06-27 19:31:25,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 19:31:25,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 19:31:25,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 286 transitions. [2024-06-27 19:31:25,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-27 19:31:25,040 INFO L175 Difference]: Start difference. First operand has 458 places, 464 transitions, 5397 flow. Second operand 13 states and 286 transitions. [2024-06-27 19:31:25,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 507 transitions, 7213 flow [2024-06-27 19:31:35,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 507 transitions, 7011 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-27 19:31:35,511 INFO L231 Difference]: Finished difference. Result has 456 places, 462 transitions, 5370 flow [2024-06-27 19:31:35,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5199, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5370, PETRI_PLACES=456, PETRI_TRANSITIONS=462} [2024-06-27 19:31:35,511 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 415 predicate places. [2024-06-27 19:31:35,511 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 462 transitions, 5370 flow [2024-06-27 19:31:35,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:35,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:35,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:35,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230 [2024-06-27 19:31:35,511 INFO L420 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:35,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:35,511 INFO L85 PathProgramCache]: Analyzing trace with hash -2142567214, now seen corresponding path program 21 times [2024-06-27 19:31:35,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:35,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138532390] [2024-06-27 19:31:35,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:35,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:35,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:35,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:35,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138532390] [2024-06-27 19:31:35,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138532390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:35,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:35,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:31:35,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090391814] [2024-06-27 19:31:35,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:35,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:31:35,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:35,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:31:35,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:31:35,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:31:35,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 462 transitions, 5370 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:35,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:35,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:31:35,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:37,775 INFO L124 PetriNetUnfolderBase]: 4683/7919 cut-off events. [2024-06-27 19:31:37,775 INFO L125 PetriNetUnfolderBase]: For 2538907/2538918 co-relation queries the response was YES. [2024-06-27 19:31:37,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77887 conditions, 7919 events. 4683/7919 cut-off events. For 2538907/2538918 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 58041 event pairs, 1772 based on Foata normal form. 35/7953 useless extension candidates. Maximal degree in co-relation 77698. Up to 6852 conditions per place. [2024-06-27 19:31:37,873 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 387 selfloop transitions, 92 changer transitions 10/496 dead transitions. [2024-06-27 19:31:37,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 496 transitions, 6804 flow [2024-06-27 19:31:37,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 19:31:37,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 19:31:37,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 296 transitions. [2024-06-27 19:31:37,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-06-27 19:31:37,874 INFO L175 Difference]: Start difference. First operand has 456 places, 462 transitions, 5370 flow. Second operand 14 states and 296 transitions. [2024-06-27 19:31:37,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 496 transitions, 6804 flow [2024-06-27 19:31:47,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 496 transitions, 6608 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-27 19:31:47,759 INFO L231 Difference]: Finished difference. Result has 456 places, 459 transitions, 5316 flow [2024-06-27 19:31:47,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5176, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5316, PETRI_PLACES=456, PETRI_TRANSITIONS=459} [2024-06-27 19:31:47,759 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 415 predicate places. [2024-06-27 19:31:47,759 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 459 transitions, 5316 flow [2024-06-27 19:31:47,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:47,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:47,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:47,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231 [2024-06-27 19:31:47,759 INFO L420 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:31:47,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:47,760 INFO L85 PathProgramCache]: Analyzing trace with hash -470994328, now seen corresponding path program 22 times [2024-06-27 19:31:47,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:47,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534335379] [2024-06-27 19:31:47,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:47,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:47,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:47,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:47,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:47,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534335379] [2024-06-27 19:31:47,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534335379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:47,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:47,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:31:47,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502396574] [2024-06-27 19:31:47,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:47,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:31:47,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:47,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:31:47,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:31:47,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:31:47,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 459 transitions, 5316 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:47,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:47,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:31:47,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:49,902 INFO L124 PetriNetUnfolderBase]: 4504/7630 cut-off events. [2024-06-27 19:31:49,902 INFO L125 PetriNetUnfolderBase]: For 2271572/2271583 co-relation queries the response was YES. [2024-06-27 19:31:49,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72778 conditions, 7630 events. 4504/7630 cut-off events. For 2271572/2271583 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 55489 event pairs, 1550 based on Foata normal form. 29/7658 useless extension candidates. Maximal degree in co-relation 72590. Up to 6152 conditions per place. [2024-06-27 19:31:50,001 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 390 selfloop transitions, 95 changer transitions 8/500 dead transitions. [2024-06-27 19:31:50,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 500 transitions, 7070 flow [2024-06-27 19:31:50,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 19:31:50,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 19:31:50,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 319 transitions. [2024-06-27 19:31:50,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5316666666666666 [2024-06-27 19:31:50,003 INFO L175 Difference]: Start difference. First operand has 456 places, 459 transitions, 5316 flow. Second operand 15 states and 319 transitions. [2024-06-27 19:31:50,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 500 transitions, 7070 flow [2024-06-27 19:32:01,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 500 transitions, 6878 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-27 19:32:01,261 INFO L231 Difference]: Finished difference. Result has 456 places, 457 transitions, 5298 flow [2024-06-27 19:32:01,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5128, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5298, PETRI_PLACES=456, PETRI_TRANSITIONS=457} [2024-06-27 19:32:01,262 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 415 predicate places. [2024-06-27 19:32:01,262 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 457 transitions, 5298 flow [2024-06-27 19:32:01,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:01,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:01,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:01,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232 [2024-06-27 19:32:01,262 INFO L420 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:01,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:01,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1985868360, now seen corresponding path program 23 times [2024-06-27 19:32:01,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:01,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729570996] [2024-06-27 19:32:01,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:01,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:01,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:01,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729570996] [2024-06-27 19:32:01,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729570996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:01,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:01,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:32:01,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561088623] [2024-06-27 19:32:01,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:01,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:32:01,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:01,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:32:01,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:32:01,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:01,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 457 transitions, 5298 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:01,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:01,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:01,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:03,397 INFO L124 PetriNetUnfolderBase]: 4627/7831 cut-off events. [2024-06-27 19:32:03,397 INFO L125 PetriNetUnfolderBase]: For 2537668/2537679 co-relation queries the response was YES. [2024-06-27 19:32:03,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77362 conditions, 7831 events. 4627/7831 cut-off events. For 2537668/2537679 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 57321 event pairs, 1762 based on Foata normal form. 35/7865 useless extension candidates. Maximal degree in co-relation 77174. Up to 6780 conditions per place. [2024-06-27 19:32:03,496 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 383 selfloop transitions, 91 changer transitions 10/491 dead transitions. [2024-06-27 19:32:03,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 491 transitions, 6722 flow [2024-06-27 19:32:03,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 19:32:03,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 19:32:03,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 294 transitions. [2024-06-27 19:32:03,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-27 19:32:03,497 INFO L175 Difference]: Start difference. First operand has 456 places, 457 transitions, 5298 flow. Second operand 14 states and 294 transitions. [2024-06-27 19:32:03,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 491 transitions, 6722 flow [2024-06-27 19:32:14,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 491 transitions, 6529 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-06-27 19:32:14,907 INFO L231 Difference]: Finished difference. Result has 455 places, 454 transitions, 5246 flow [2024-06-27 19:32:14,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5107, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5246, PETRI_PLACES=455, PETRI_TRANSITIONS=454} [2024-06-27 19:32:14,908 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 414 predicate places. [2024-06-27 19:32:14,908 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 454 transitions, 5246 flow [2024-06-27 19:32:14,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:14,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:14,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:14,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233 [2024-06-27 19:32:14,909 INFO L420 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:14,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:14,909 INFO L85 PathProgramCache]: Analyzing trace with hash -470988748, now seen corresponding path program 24 times [2024-06-27 19:32:14,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:14,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925245962] [2024-06-27 19:32:14,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:14,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:15,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:15,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:15,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925245962] [2024-06-27 19:32:15,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925245962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:15,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:15,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:32:15,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766876553] [2024-06-27 19:32:15,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:15,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:32:15,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:15,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:32:15,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:32:15,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:15,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 454 transitions, 5246 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:15,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:15,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:15,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:17,307 INFO L124 PetriNetUnfolderBase]: 4494/7590 cut-off events. [2024-06-27 19:32:17,307 INFO L125 PetriNetUnfolderBase]: For 2342507/2342518 co-relation queries the response was YES. [2024-06-27 19:32:17,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73754 conditions, 7590 events. 4494/7590 cut-off events. For 2342507/2342518 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 54982 event pairs, 1677 based on Foata normal form. 29/7618 useless extension candidates. Maximal degree in co-relation 73566. Up to 6152 conditions per place. [2024-06-27 19:32:17,408 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 382 selfloop transitions, 89 changer transitions 13/491 dead transitions. [2024-06-27 19:32:17,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 491 transitions, 6676 flow [2024-06-27 19:32:17,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 19:32:17,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 19:32:17,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 315 transitions. [2024-06-27 19:32:17,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-27 19:32:17,409 INFO L175 Difference]: Start difference. First operand has 455 places, 454 transitions, 5246 flow. Second operand 15 states and 315 transitions. [2024-06-27 19:32:17,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 491 transitions, 6676 flow [2024-06-27 19:32:27,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 491 transitions, 6491 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-27 19:32:27,975 INFO L231 Difference]: Finished difference. Result has 456 places, 451 transitions, 5199 flow [2024-06-27 19:32:27,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5063, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5199, PETRI_PLACES=456, PETRI_TRANSITIONS=451} [2024-06-27 19:32:27,975 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 415 predicate places. [2024-06-27 19:32:27,975 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 451 transitions, 5199 flow [2024-06-27 19:32:27,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:27,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:27,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:27,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234 [2024-06-27 19:32:27,976 INFO L420 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:27,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:27,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1985720490, now seen corresponding path program 25 times [2024-06-27 19:32:27,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:27,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453659559] [2024-06-27 19:32:27,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:27,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:27,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:28,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:28,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:28,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453659559] [2024-06-27 19:32:28,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453659559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:28,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:28,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:32:28,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555487411] [2024-06-27 19:32:28,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:28,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:32:28,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:28,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:32:28,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:32:28,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:28,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 451 transitions, 5199 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:28,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:28,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:28,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:30,041 INFO L124 PetriNetUnfolderBase]: 4369/7381 cut-off events. [2024-06-27 19:32:30,042 INFO L125 PetriNetUnfolderBase]: For 2193652/2193663 co-relation queries the response was YES. [2024-06-27 19:32:30,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69286 conditions, 7381 events. 4369/7381 cut-off events. For 2193652/2193663 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 53355 event pairs, 1636 based on Foata normal form. 37/7417 useless extension candidates. Maximal degree in co-relation 69098. Up to 6603 conditions per place. [2024-06-27 19:32:30,133 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 371 selfloop transitions, 85 changer transitions 14/477 dead transitions. [2024-06-27 19:32:30,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 477 transitions, 6259 flow [2024-06-27 19:32:30,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 19:32:30,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 19:32:30,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 269 transitions. [2024-06-27 19:32:30,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173076923076924 [2024-06-27 19:32:30,134 INFO L175 Difference]: Start difference. First operand has 456 places, 451 transitions, 5199 flow. Second operand 13 states and 269 transitions. [2024-06-27 19:32:30,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 477 transitions, 6259 flow [2024-06-27 19:32:38,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 477 transitions, 6084 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-27 19:32:38,838 INFO L231 Difference]: Finished difference. Result has 453 places, 446 transitions, 5141 flow [2024-06-27 19:32:38,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5024, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5141, PETRI_PLACES=453, PETRI_TRANSITIONS=446} [2024-06-27 19:32:38,839 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 412 predicate places. [2024-06-27 19:32:38,839 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 446 transitions, 5141 flow [2024-06-27 19:32:38,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:38,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:38,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:38,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable235 [2024-06-27 19:32:38,839 INFO L420 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:38,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:38,839 INFO L85 PathProgramCache]: Analyzing trace with hash 467129024, now seen corresponding path program 26 times [2024-06-27 19:32:38,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:38,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318685907] [2024-06-27 19:32:38,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:38,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:38,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:38,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318685907] [2024-06-27 19:32:38,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318685907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:38,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:38,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:32:38,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362132064] [2024-06-27 19:32:38,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:38,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:32:38,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:38,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:32:38,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:32:39,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:32:39,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 446 transitions, 5141 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:39,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:39,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:32:39,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15