./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe015_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/safe015_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/safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe015_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 19:25:34,772 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 19:25:34,853 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 19:25:34,860 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 19:25:34,860 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 19:25:34,890 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 19:25:34,891 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 19:25:34,891 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 19:25:34,892 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 19:25:34,897 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 19:25:34,897 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 19:25:34,898 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 19:25:34,899 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 19:25:34,900 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 19:25:34,900 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 19:25:34,901 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 19:25:34,901 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 19:25:34,901 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 19:25:34,902 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 19:25:34,903 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 19:25:34,903 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 19:25:34,904 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 19:25:34,904 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 19:25:34,904 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 19:25:34,905 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 19:25:34,905 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 19:25:34,905 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 19:25:34,905 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 19:25:34,906 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 19:25:34,906 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 19:25:34,907 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 19:25:34,907 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 19:25:34,908 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:25:34,908 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 19:25:34,908 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 19:25:34,908 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 19:25:34,908 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 19:25:34,909 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 19:25:34,909 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 19:25:34,909 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 19:25:34,909 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 19:25:34,910 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 19:25:34,910 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 19:25:34,910 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 19:25:35,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 19:25:35,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 19:25:35,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 19:25:35,149 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 19:25:35,150 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 19:25:35,151 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-27 19:25:35,316 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 19:25:35,316 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 19:25:35,317 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 19:25:36,432 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 19:25:36,693 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 19:25:36,693 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 19:25:36,709 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/106c17054/e0e4066b33f1479ea26ce308e95ffe56/FLAG4cf35e057 [2024-06-27 19:25:36,724 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/106c17054/e0e4066b33f1479ea26ce308e95ffe56 [2024-06-27 19:25:36,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 19:25:36,726 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 19:25:36,727 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 19:25:36,727 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 19:25:36,732 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 19:25:36,733 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:25:35" (1/2) ... [2024-06-27 19:25:36,734 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a1d6a3c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:25:36, skipping insertion in model container [2024-06-27 19:25:36,734 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:25:35" (1/2) ... [2024-06-27 19:25:36,737 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6e3ccb99 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:25:36, skipping insertion in model container [2024-06-27 19:25:36,737 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:25:36" (2/2) ... [2024-06-27 19:25:36,738 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a1d6a3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:25:36, skipping insertion in model container [2024-06-27 19:25:36,738 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:25:36" (2/2) ... [2024-06-27 19:25:36,738 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 19:25:36,784 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 19:25:36,785 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-27 19:25:36,786 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] ((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-27 19:25:36,786 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] ((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-27 19:25:36,786 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 19:25:36,786 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-27 19:25:36,843 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 19:25:37,141 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:25:37,154 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 19:25:37,254 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:25:37,294 INFO L206 MainTranslator]: Completed translation [2024-06-27 19:25:37,295 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:25:37 WrapperNode [2024-06-27 19:25:37,295 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 19:25:37,296 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 19:25:37,296 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 19:25:37,297 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 19:25:37,303 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:25:37" (1/1) ... [2024-06-27 19:25:37,335 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:25:37" (1/1) ... [2024-06-27 19:25:37,359 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-27 19:25:37,362 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 19:25:37,363 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 19:25:37,364 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 19:25:37,364 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 19:25:37,373 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:25:37" (1/1) ... [2024-06-27 19:25:37,374 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:25:37" (1/1) ... [2024-06-27 19:25:37,379 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:25:37" (1/1) ... [2024-06-27 19:25:37,392 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 19:25:37,392 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:25:37" (1/1) ... [2024-06-27 19:25:37,392 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:25:37" (1/1) ... [2024-06-27 19:25:37,398 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:25:37" (1/1) ... [2024-06-27 19:25:37,400 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:25:37" (1/1) ... [2024-06-27 19:25:37,400 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:25:37" (1/1) ... [2024-06-27 19:25:37,401 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:25:37" (1/1) ... [2024-06-27 19:25:37,403 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 19:25:37,403 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 19:25:37,404 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 19:25:37,404 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 19:25:37,405 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:25:37" (1/1) ... [2024-06-27 19:25:37,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:25:37,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 19:25:37,442 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 19:25:37,444 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 19:25:37,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 19:25:37,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 19:25:37,471 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 19:25:37,472 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 19:25:37,472 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 19:25:37,472 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 19:25:37,472 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 19:25:37,473 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 19:25:37,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 19:25:37,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 19:25:37,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 19:25:37,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 19:25:37,475 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 19:25:37,573 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 19:25:37,576 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 19:25:37,837 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 19:25:37,838 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 19:25:37,927 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 19:25:37,930 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 19:25:37,931 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:25:37 BoogieIcfgContainer [2024-06-27 19:25:37,932 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 19:25:37,935 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 19:25:37,935 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 19:25:37,938 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 19:25:37,938 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:25:35" (1/4) ... [2024-06-27 19:25:37,939 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a3d2444 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:25:37, skipping insertion in model container [2024-06-27 19:25:37,939 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 07:25:36" (2/4) ... [2024-06-27 19:25:37,940 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a3d2444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:25:37, skipping insertion in model container [2024-06-27 19:25:37,940 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:25:37" (3/4) ... [2024-06-27 19:25:37,940 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a3d2444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:25:37, skipping insertion in model container [2024-06-27 19:25:37,941 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:25:37" (4/4) ... [2024-06-27 19:25:37,942 INFO L112 eAbstractionObserver]: Analyzing ICFG safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 19:25:37,958 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 19:25:37,958 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 19:25:37,958 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 19:25:38,006 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 19:25:38,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 19:25:38,087 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-27 19:25:38,087 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:25:38,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 19:25:38,090 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 19:25:38,100 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-27 19:25:38,115 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 19:25:38,122 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;@5e63b7d8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 19:25:38,123 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 19:25:38,132 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 19:25:38,132 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 19:25:38,132 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:25:38,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:38,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 19:25:38,134 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 19:25:38,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:38,138 INFO L85 PathProgramCache]: Analyzing trace with hash 219931435, now seen corresponding path program 1 times [2024-06-27 19:25:38,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:38,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754079018] [2024-06-27 19:25:38,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:38,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:38,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:38,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:38,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:38,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754079018] [2024-06-27 19:25:38,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754079018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:38,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:38,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 19:25:38,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888253379] [2024-06-27 19:25:38,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:38,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 19:25:38,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:38,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 19:25:38,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 19:25:38,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 19:25:38,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 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 19:25:38,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:38,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 19:25:38,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:38,800 INFO L124 PetriNetUnfolderBase]: 603/1018 cut-off events. [2024-06-27 19:25:38,801 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-27 19:25:38,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2010 conditions, 1018 events. 603/1018 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5139 event pairs, 376 based on Foata normal form. 1/962 useless extension candidates. Maximal degree in co-relation 1998. Up to 929 conditions per place. [2024-06-27 19:25:38,815 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 28 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-27 19:25:38,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 163 flow [2024-06-27 19:25:38,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 19:25:38,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 19:25:38,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-06-27 19:25:38,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6991869918699187 [2024-06-27 19:25:38,830 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 86 transitions. [2024-06-27 19:25:38,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 163 flow [2024-06-27 19:25:38,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 158 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:25:38,835 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-27 19:25:38,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-27 19:25:38,840 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-27 19:25:38,841 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-27 19:25:38,841 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 19:25:38,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:38,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:38,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 19:25:38,842 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 19:25:38,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:38,843 INFO L85 PathProgramCache]: Analyzing trace with hash 900722890, now seen corresponding path program 1 times [2024-06-27 19:25:38,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:38,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947060010] [2024-06-27 19:25:38,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:38,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:38,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:39,024 INFO 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 19:25:39,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:39,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947060010] [2024-06-27 19:25:39,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947060010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:39,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:39,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:25:39,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857138997] [2024-06-27 19:25:39,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:39,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:25:39,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:39,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:25:39,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:25:39,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 19:25:39,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:39,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:39,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 19:25:39,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:39,291 INFO L124 PetriNetUnfolderBase]: 604/1028 cut-off events. [2024-06-27 19:25:39,291 INFO L125 PetriNetUnfolderBase]: For 201/209 co-relation queries the response was YES. [2024-06-27 19:25:39,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2336 conditions, 1028 events. 604/1028 cut-off events. For 201/209 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5256 event pairs, 320 based on Foata normal form. 7/1009 useless extension candidates. Maximal degree in co-relation 2324. Up to 903 conditions per place. [2024-06-27 19:25:39,298 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 37 selfloop transitions, 11 changer transitions 0/58 dead transitions. [2024-06-27 19:25:39,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 260 flow [2024-06-27 19:25:39,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:25:39,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:25:39,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-06-27 19:25:39,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7134146341463414 [2024-06-27 19:25:39,303 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 117 transitions. [2024-06-27 19:25:39,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 260 flow [2024-06-27 19:25:39,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 58 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 19:25:39,307 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 172 flow [2024-06-27 19:25:39,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2024-06-27 19:25:39,308 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-27 19:25:39,308 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 172 flow [2024-06-27 19:25:39,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:39,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:39,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:39,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 19:25:39,312 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:39,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:39,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1616478059, now seen corresponding path program 1 times [2024-06-27 19:25:39,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:39,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041180143] [2024-06-27 19:25:39,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:39,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:39,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:39,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:39,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041180143] [2024-06-27 19:25:39,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041180143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:39,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:39,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:25:39,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899063843] [2024-06-27 19:25:39,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:39,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:25:39,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:39,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:25:39,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:25:39,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:39,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:39,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:39,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:39,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:39,702 INFO L124 PetriNetUnfolderBase]: 934/1513 cut-off events. [2024-06-27 19:25:39,703 INFO L125 PetriNetUnfolderBase]: For 1013/1013 co-relation queries the response was YES. [2024-06-27 19:25:39,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4062 conditions, 1513 events. 934/1513 cut-off events. For 1013/1013 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7562 event pairs, 515 based on Foata normal form. 2/1511 useless extension candidates. Maximal degree in co-relation 4047. Up to 1394 conditions per place. [2024-06-27 19:25:39,714 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 47 selfloop transitions, 9 changer transitions 0/64 dead transitions. [2024-06-27 19:25:39,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 64 transitions, 359 flow [2024-06-27 19:25:39,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:25:39,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:25:39,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-06-27 19:25:39,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-27 19:25:39,720 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 172 flow. Second operand 4 states and 106 transitions. [2024-06-27 19:25:39,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 64 transitions, 359 flow [2024-06-27 19:25:39,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 64 transitions, 355 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 19:25:39,726 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 248 flow [2024-06-27 19:25:39,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=248, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2024-06-27 19:25:39,727 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-27 19:25:39,727 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 248 flow [2024-06-27 19:25:39,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:39,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:39,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:39,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 19:25:39,730 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:39,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:39,730 INFO L85 PathProgramCache]: Analyzing trace with hash 135946248, now seen corresponding path program 1 times [2024-06-27 19:25:39,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:39,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666402088] [2024-06-27 19:25:39,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:39,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:39,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:39,915 INFO 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 19:25:39,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:39,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666402088] [2024-06-27 19:25:39,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666402088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:39,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:39,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:25:39,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187572108] [2024-06-27 19:25:39,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:39,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:25:39,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:39,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:25:39,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:25:39,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:25:39,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 248 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 19:25:39,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:39,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:25:39,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:40,162 INFO L124 PetriNetUnfolderBase]: 934/1538 cut-off events. [2024-06-27 19:25:40,162 INFO L125 PetriNetUnfolderBase]: For 1911/1932 co-relation queries the response was YES. [2024-06-27 19:25:40,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4645 conditions, 1538 events. 934/1538 cut-off events. For 1911/1932 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7898 event pairs, 249 based on Foata normal form. 20/1539 useless extension candidates. Maximal degree in co-relation 4626. Up to 1283 conditions per place. [2024-06-27 19:25:40,174 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 57 selfloop transitions, 19 changer transitions 0/87 dead transitions. [2024-06-27 19:25:40,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 87 transitions, 510 flow [2024-06-27 19:25:40,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:25:40,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:25:40,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-27 19:25:40,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6788617886178862 [2024-06-27 19:25:40,177 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 248 flow. Second operand 6 states and 167 transitions. [2024-06-27 19:25:40,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 87 transitions, 510 flow [2024-06-27 19:25:40,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 87 transitions, 506 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 19:25:40,181 INFO L231 Difference]: Finished difference. Result has 57 places, 56 transitions, 327 flow [2024-06-27 19:25:40,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=327, PETRI_PLACES=57, PETRI_TRANSITIONS=56} [2024-06-27 19:25:40,182 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 15 predicate places. [2024-06-27 19:25:40,183 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 56 transitions, 327 flow [2024-06-27 19:25:40,183 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 19:25:40,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:40,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:40,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 19:25:40,184 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 19:25:40,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:40,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1428789046, now seen corresponding path program 1 times [2024-06-27 19:25:40,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:40,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080447508] [2024-06-27 19:25:40,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:40,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:40,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:40,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:40,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:40,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080447508] [2024-06-27 19:25:40,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080447508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:40,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:40,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:25:40,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932778096] [2024-06-27 19:25:40,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:40,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:25:40,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:40,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:25:40,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:25:40,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:40,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 56 transitions, 327 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:40,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:40,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:40,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:40,444 INFO L124 PetriNetUnfolderBase]: 953/1561 cut-off events. [2024-06-27 19:25:40,444 INFO L125 PetriNetUnfolderBase]: For 2704/2707 co-relation queries the response was YES. [2024-06-27 19:25:40,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5177 conditions, 1561 events. 953/1561 cut-off events. For 2704/2707 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7907 event pairs, 379 based on Foata normal form. 4/1562 useless extension candidates. Maximal degree in co-relation 5154. Up to 1429 conditions per place. [2024-06-27 19:25:40,457 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 51 selfloop transitions, 9 changer transitions 0/68 dead transitions. [2024-06-27 19:25:40,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 68 transitions, 480 flow [2024-06-27 19:25:40,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:25:40,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:25:40,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-27 19:25:40,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-27 19:25:40,459 INFO L175 Difference]: Start difference. First operand has 57 places, 56 transitions, 327 flow. Second operand 4 states and 103 transitions. [2024-06-27 19:25:40,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 68 transitions, 480 flow [2024-06-27 19:25:40,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 68 transitions, 442 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 19:25:40,464 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 320 flow [2024-06-27 19:25:40,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=320, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2024-06-27 19:25:40,465 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-27 19:25:40,466 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 320 flow [2024-06-27 19:25:40,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:40,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:40,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:40,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 19:25:40,467 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 19:25:40,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:40,467 INFO L85 PathProgramCache]: Analyzing trace with hash 588061642, now seen corresponding path program 1 times [2024-06-27 19:25:40,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:40,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158502932] [2024-06-27 19:25:40,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:40,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:40,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:40,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:40,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:40,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158502932] [2024-06-27 19:25:40,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158502932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:40,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:40,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:25:40,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590996315] [2024-06-27 19:25:40,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:40,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:25:40,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:40,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:25:40,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:25:40,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:40,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 320 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 19:25:40,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:40,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:40,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:40,776 INFO L124 PetriNetUnfolderBase]: 964/1573 cut-off events. [2024-06-27 19:25:40,776 INFO L125 PetriNetUnfolderBase]: For 3150/3150 co-relation queries the response was YES. [2024-06-27 19:25:40,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5241 conditions, 1573 events. 964/1573 cut-off events. For 3150/3150 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7862 event pairs, 354 based on Foata normal form. 2/1570 useless extension candidates. Maximal degree in co-relation 5217. Up to 1387 conditions per place. [2024-06-27 19:25:40,790 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 62 selfloop transitions, 16 changer transitions 0/86 dead transitions. [2024-06-27 19:25:40,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 86 transitions, 585 flow [2024-06-27 19:25:40,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:25:40,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:25:40,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-27 19:25:40,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6487804878048781 [2024-06-27 19:25:40,792 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 320 flow. Second operand 5 states and 133 transitions. [2024-06-27 19:25:40,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 86 transitions, 585 flow [2024-06-27 19:25:40,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 86 transitions, 573 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 19:25:40,798 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 404 flow [2024-06-27 19:25:40,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=404, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2024-06-27 19:25:40,799 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-27 19:25:40,799 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 404 flow [2024-06-27 19:25:40,799 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 19:25:40,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:40,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:40,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 19:25:40,800 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 19:25:40,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:40,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1367804332, now seen corresponding path program 2 times [2024-06-27 19:25:40,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:40,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989795802] [2024-06-27 19:25:40,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:40,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:40,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:40,887 INFO 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 19:25:40,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:40,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989795802] [2024-06-27 19:25:40,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989795802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:40,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:40,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:25:40,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920860269] [2024-06-27 19:25:40,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:40,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:25:40,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:40,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:25:40,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:25:40,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:40,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 404 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 19:25:40,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:40,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:40,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:41,125 INFO L124 PetriNetUnfolderBase]: 959/1559 cut-off events. [2024-06-27 19:25:41,125 INFO L125 PetriNetUnfolderBase]: For 4457/4457 co-relation queries the response was YES. [2024-06-27 19:25:41,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5731 conditions, 1559 events. 959/1559 cut-off events. For 4457/4457 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7799 event pairs, 355 based on Foata normal form. 2/1553 useless extension candidates. Maximal degree in co-relation 5704. Up to 1384 conditions per place. [2024-06-27 19:25:41,137 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 58 selfloop transitions, 19 changer transitions 0/85 dead transitions. [2024-06-27 19:25:41,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 85 transitions, 644 flow [2024-06-27 19:25:41,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:25:41,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:25:41,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-27 19:25:41,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-27 19:25:41,139 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 404 flow. Second operand 5 states and 129 transitions. [2024-06-27 19:25:41,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 85 transitions, 644 flow [2024-06-27 19:25:41,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 85 transitions, 624 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 19:25:41,146 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 452 flow [2024-06-27 19:25:41,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=452, PETRI_PLACES=67, PETRI_TRANSITIONS=68} [2024-06-27 19:25:41,148 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-27 19:25:41,148 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 452 flow [2024-06-27 19:25:41,148 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 19:25:41,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:41,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:41,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 19:25:41,149 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 19:25:41,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:41,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1593731481, now seen corresponding path program 1 times [2024-06-27 19:25:41,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:41,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105115276] [2024-06-27 19:25:41,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:41,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:41,241 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 19:25:41,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:41,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105115276] [2024-06-27 19:25:41,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105115276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:41,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:41,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:25:41,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034664122] [2024-06-27 19:25:41,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:41,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:25:41,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:41,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:25:41,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:25:41,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:41,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 68 transitions, 452 flow. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:41,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:41,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:41,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:41,450 INFO L124 PetriNetUnfolderBase]: 970/1591 cut-off events. [2024-06-27 19:25:41,451 INFO L125 PetriNetUnfolderBase]: For 5493/5493 co-relation queries the response was YES. [2024-06-27 19:25:41,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6102 conditions, 1591 events. 970/1591 cut-off events. For 5493/5493 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8029 event pairs, 349 based on Foata normal form. 2/1588 useless extension candidates. Maximal degree in co-relation 6073. Up to 1396 conditions per place. [2024-06-27 19:25:41,465 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 62 selfloop transitions, 21 changer transitions 0/91 dead transitions. [2024-06-27 19:25:41,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 91 transitions, 719 flow [2024-06-27 19:25:41,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:25:41,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:25:41,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-27 19:25:41,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6487804878048781 [2024-06-27 19:25:41,467 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 452 flow. Second operand 5 states and 133 transitions. [2024-06-27 19:25:41,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 91 transitions, 719 flow [2024-06-27 19:25:41,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 91 transitions, 689 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 19:25:41,477 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 496 flow [2024-06-27 19:25:41,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=496, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2024-06-27 19:25:41,478 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-27 19:25:41,478 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 496 flow [2024-06-27 19:25:41,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:41,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:41,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:41,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 19:25:41,479 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 19:25:41,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:41,479 INFO L85 PathProgramCache]: Analyzing trace with hash -547470435, now seen corresponding path program 2 times [2024-06-27 19:25:41,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:41,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620539905] [2024-06-27 19:25:41,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:41,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:41,562 INFO 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 19:25:41,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:41,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620539905] [2024-06-27 19:25:41,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620539905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:41,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:41,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:25:41,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850224189] [2024-06-27 19:25:41,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:41,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:25:41,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:41,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:25:41,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:25:41,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:41,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 496 flow. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:41,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:41,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:41,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:41,759 INFO L124 PetriNetUnfolderBase]: 965/1580 cut-off events. [2024-06-27 19:25:41,759 INFO L125 PetriNetUnfolderBase]: For 6618/6624 co-relation queries the response was YES. [2024-06-27 19:25:41,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6197 conditions, 1580 events. 965/1580 cut-off events. For 6618/6624 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7959 event pairs, 360 based on Foata normal form. 6/1579 useless extension candidates. Maximal degree in co-relation 6166. Up to 1391 conditions per place. [2024-06-27 19:25:41,772 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 58 selfloop transitions, 21 changer transitions 0/87 dead transitions. [2024-06-27 19:25:41,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 87 transitions, 700 flow [2024-06-27 19:25:41,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:25:41,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:25:41,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-27 19:25:41,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195121951219512 [2024-06-27 19:25:41,774 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 496 flow. Second operand 5 states and 127 transitions. [2024-06-27 19:25:41,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 87 transitions, 700 flow [2024-06-27 19:25:41,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 87 transitions, 673 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 19:25:41,782 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 527 flow [2024-06-27 19:25:41,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=527, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2024-06-27 19:25:41,783 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2024-06-27 19:25:41,783 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 527 flow [2024-06-27 19:25:41,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:41,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:41,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:41,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 19:25:41,784 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 19:25:41,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:41,785 INFO L85 PathProgramCache]: Analyzing trace with hash -547460515, now seen corresponding path program 1 times [2024-06-27 19:25:41,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:41,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050392109] [2024-06-27 19:25:41,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:41,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:41,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:41,869 INFO 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 19:25:41,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:41,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050392109] [2024-06-27 19:25:41,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050392109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:41,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:41,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:25:41,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769928466] [2024-06-27 19:25:41,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:41,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:25:41,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:41,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:25:41,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:25:41,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:41,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 527 flow. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:41,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:41,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:41,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:42,091 INFO L124 PetriNetUnfolderBase]: 957/1573 cut-off events. [2024-06-27 19:25:42,092 INFO L125 PetriNetUnfolderBase]: For 7572/7578 co-relation queries the response was YES. [2024-06-27 19:25:42,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6281 conditions, 1573 events. 957/1573 cut-off events. For 7572/7578 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7904 event pairs, 329 based on Foata normal form. 8/1578 useless extension candidates. Maximal degree in co-relation 6249. Up to 1417 conditions per place. [2024-06-27 19:25:42,105 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 71 selfloop transitions, 11 changer transitions 0/90 dead transitions. [2024-06-27 19:25:42,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 90 transitions, 745 flow [2024-06-27 19:25:42,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:25:42,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:25:42,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-27 19:25:42,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:25:42,107 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 527 flow. Second operand 5 states and 125 transitions. [2024-06-27 19:25:42,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 90 transitions, 745 flow [2024-06-27 19:25:42,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 90 transitions, 717 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 19:25:42,116 INFO L231 Difference]: Finished difference. Result has 76 places, 74 transitions, 546 flow [2024-06-27 19:25:42,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=546, PETRI_PLACES=76, PETRI_TRANSITIONS=74} [2024-06-27 19:25:42,116 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-06-27 19:25:42,117 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 74 transitions, 546 flow [2024-06-27 19:25:42,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:42,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:42,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:42,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 19:25:42,118 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:42,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:42,118 INFO L85 PathProgramCache]: Analyzing trace with hash -915316437, now seen corresponding path program 1 times [2024-06-27 19:25:42,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:42,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421605781] [2024-06-27 19:25:42,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:42,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:42,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:42,212 INFO 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 19:25:42,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:42,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421605781] [2024-06-27 19:25:42,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421605781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:42,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:42,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:25:42,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448478092] [2024-06-27 19:25:42,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:42,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:25:42,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:42,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:25:42,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:25:42,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:42,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 74 transitions, 546 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 19:25:42,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:42,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:42,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:42,486 INFO L124 PetriNetUnfolderBase]: 1012/1669 cut-off events. [2024-06-27 19:25:42,486 INFO L125 PetriNetUnfolderBase]: For 9132/9132 co-relation queries the response was YES. [2024-06-27 19:25:42,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6824 conditions, 1669 events. 1012/1669 cut-off events. For 9132/9132 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8600 event pairs, 271 based on Foata normal form. 4/1669 useless extension candidates. Maximal degree in co-relation 6790. Up to 1429 conditions per place. [2024-06-27 19:25:42,499 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 81 selfloop transitions, 29 changer transitions 0/118 dead transitions. [2024-06-27 19:25:42,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 118 transitions, 982 flow [2024-06-27 19:25:42,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:42,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:42,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-27 19:25:42,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-27 19:25:42,501 INFO L175 Difference]: Start difference. First operand has 76 places, 74 transitions, 546 flow. Second operand 7 states and 189 transitions. [2024-06-27 19:25:42,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 118 transitions, 982 flow [2024-06-27 19:25:42,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 118 transitions, 953 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 19:25:42,515 INFO L231 Difference]: Finished difference. Result has 81 places, 84 transitions, 667 flow [2024-06-27 19:25:42,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=667, PETRI_PLACES=81, PETRI_TRANSITIONS=84} [2024-06-27 19:25:42,516 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-27 19:25:42,516 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 84 transitions, 667 flow [2024-06-27 19:25:42,516 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 19:25:42,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:42,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:42,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 19:25:42,517 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 19:25:42,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:42,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1808409687, now seen corresponding path program 2 times [2024-06-27 19:25:42,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:42,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699460063] [2024-06-27 19:25:42,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:42,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:42,598 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 19:25:42,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:42,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699460063] [2024-06-27 19:25:42,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699460063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:42,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:42,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:25:42,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440330257] [2024-06-27 19:25:42,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:42,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:25:42,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:42,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:25:42,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:25:42,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:42,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 84 transitions, 667 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 19:25:42,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:42,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:42,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:42,875 INFO L124 PetriNetUnfolderBase]: 1023/1697 cut-off events. [2024-06-27 19:25:42,876 INFO L125 PetriNetUnfolderBase]: For 11529/11529 co-relation queries the response was YES. [2024-06-27 19:25:42,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7657 conditions, 1697 events. 1023/1697 cut-off events. For 11529/11529 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8692 event pairs, 311 based on Foata normal form. 2/1694 useless extension candidates. Maximal degree in co-relation 7621. Up to 1390 conditions per place. [2024-06-27 19:25:42,892 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 81 selfloop transitions, 32 changer transitions 0/121 dead transitions. [2024-06-27 19:25:42,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 121 transitions, 1113 flow [2024-06-27 19:25:42,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:25:42,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:25:42,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-27 19:25:42,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382113821138211 [2024-06-27 19:25:42,894 INFO L175 Difference]: Start difference. First operand has 81 places, 84 transitions, 667 flow. Second operand 6 states and 157 transitions. [2024-06-27 19:25:42,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 121 transitions, 1113 flow [2024-06-27 19:25:42,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 121 transitions, 1037 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-27 19:25:42,911 INFO L231 Difference]: Finished difference. Result has 86 places, 96 transitions, 818 flow [2024-06-27 19:25:42,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=818, PETRI_PLACES=86, PETRI_TRANSITIONS=96} [2024-06-27 19:25:42,912 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-27 19:25:42,912 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 96 transitions, 818 flow [2024-06-27 19:25:42,913 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 19:25:42,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:42,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:42,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 19:25:42,913 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 19:25:42,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:42,914 INFO L85 PathProgramCache]: Analyzing trace with hash 200005899, now seen corresponding path program 3 times [2024-06-27 19:25:42,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:42,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838574487] [2024-06-27 19:25:42,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:42,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:42,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:43,001 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 19:25:43,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:43,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838574487] [2024-06-27 19:25:43,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838574487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:43,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:43,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:25:43,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140646220] [2024-06-27 19:25:43,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:43,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:25:43,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:43,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:25:43,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:25:43,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:43,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 96 transitions, 818 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 19:25:43,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:43,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:43,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:43,240 INFO L124 PetriNetUnfolderBase]: 1018/1667 cut-off events. [2024-06-27 19:25:43,241 INFO L125 PetriNetUnfolderBase]: For 14135/14135 co-relation queries the response was YES. [2024-06-27 19:25:43,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8135 conditions, 1667 events. 1018/1667 cut-off events. For 14135/14135 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8488 event pairs, 337 based on Foata normal form. 2/1655 useless extension candidates. Maximal degree in co-relation 8095. Up to 1387 conditions per place. [2024-06-27 19:25:43,275 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 76 selfloop transitions, 36 changer transitions 0/120 dead transitions. [2024-06-27 19:25:43,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 120 transitions, 1178 flow [2024-06-27 19:25:43,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:25:43,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:25:43,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 19:25:43,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-27 19:25:43,277 INFO L175 Difference]: Start difference. First operand has 86 places, 96 transitions, 818 flow. Second operand 6 states and 153 transitions. [2024-06-27 19:25:43,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 120 transitions, 1178 flow [2024-06-27 19:25:43,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 120 transitions, 1142 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-27 19:25:43,294 INFO L231 Difference]: Finished difference. Result has 91 places, 99 transitions, 900 flow [2024-06-27 19:25:43,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=900, PETRI_PLACES=91, PETRI_TRANSITIONS=99} [2024-06-27 19:25:43,295 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-27 19:25:43,295 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 99 transitions, 900 flow [2024-06-27 19:25:43,295 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 19:25:43,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:43,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:43,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 19:25:43,296 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:43,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:43,296 INFO L85 PathProgramCache]: Analyzing trace with hash 641726190, now seen corresponding path program 1 times [2024-06-27 19:25:43,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:43,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146447439] [2024-06-27 19:25:43,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:43,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:43,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:43,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:43,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146447439] [2024-06-27 19:25:43,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146447439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:43,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:43,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:25:43,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312938269] [2024-06-27 19:25:43,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:43,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:25:43,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:43,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:25:43,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:25:43,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:25:43,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 99 transitions, 900 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:43,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:43,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:25:43,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:43,602 INFO L124 PetriNetUnfolderBase]: 923/1561 cut-off events. [2024-06-27 19:25:43,603 INFO L125 PetriNetUnfolderBase]: For 15407/15412 co-relation queries the response was YES. [2024-06-27 19:25:43,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7910 conditions, 1561 events. 923/1561 cut-off events. For 15407/15412 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8111 event pairs, 312 based on Foata normal form. 8/1562 useless extension candidates. Maximal degree in co-relation 7868. Up to 1345 conditions per place. [2024-06-27 19:25:43,618 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 75 selfloop transitions, 18 changer transitions 0/108 dead transitions. [2024-06-27 19:25:43,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 108 transitions, 1121 flow [2024-06-27 19:25:43,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:25:43,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:25:43,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-27 19:25:43,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6402439024390244 [2024-06-27 19:25:43,620 INFO L175 Difference]: Start difference. First operand has 91 places, 99 transitions, 900 flow. Second operand 4 states and 105 transitions. [2024-06-27 19:25:43,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 108 transitions, 1121 flow [2024-06-27 19:25:43,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 108 transitions, 1055 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 19:25:43,641 INFO L231 Difference]: Finished difference. Result has 92 places, 99 transitions, 880 flow [2024-06-27 19:25:43,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=835, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=880, PETRI_PLACES=92, PETRI_TRANSITIONS=99} [2024-06-27 19:25:43,642 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-27 19:25:43,642 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 99 transitions, 880 flow [2024-06-27 19:25:43,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:43,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:43,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:43,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 19:25:43,643 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 19:25:43,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:43,644 INFO L85 PathProgramCache]: Analyzing trace with hash -96637342, now seen corresponding path program 1 times [2024-06-27 19:25:43,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:43,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605231911] [2024-06-27 19:25:43,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:43,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:43,734 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 19:25:43,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:43,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605231911] [2024-06-27 19:25:43,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605231911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:43,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:43,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:25:43,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333131880] [2024-06-27 19:25:43,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:43,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:25:43,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:43,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:25:43,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:25:43,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:43,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 99 transitions, 880 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:43,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:43,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:43,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:44,033 INFO L124 PetriNetUnfolderBase]: 982/1632 cut-off events. [2024-06-27 19:25:44,034 INFO L125 PetriNetUnfolderBase]: For 16651/16651 co-relation queries the response was YES. [2024-06-27 19:25:44,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8164 conditions, 1632 events. 982/1632 cut-off events. For 16651/16651 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8263 event pairs, 302 based on Foata normal form. 4/1632 useless extension candidates. Maximal degree in co-relation 8120. Up to 1396 conditions per place. [2024-06-27 19:25:44,049 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 87 selfloop transitions, 35 changer transitions 0/130 dead transitions. [2024-06-27 19:25:44,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 130 transitions, 1218 flow [2024-06-27 19:25:44,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:44,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:44,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-27 19:25:44,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6480836236933798 [2024-06-27 19:25:44,051 INFO L175 Difference]: Start difference. First operand has 92 places, 99 transitions, 880 flow. Second operand 7 states and 186 transitions. [2024-06-27 19:25:44,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 130 transitions, 1218 flow [2024-06-27 19:25:44,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 130 transitions, 1166 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 19:25:44,077 INFO L231 Difference]: Finished difference. Result has 96 places, 99 transitions, 911 flow [2024-06-27 19:25:44,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=911, PETRI_PLACES=96, PETRI_TRANSITIONS=99} [2024-06-27 19:25:44,078 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-06-27 19:25:44,079 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 99 transitions, 911 flow [2024-06-27 19:25:44,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:44,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:44,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:44,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 19:25:44,079 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 19:25:44,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:44,080 INFO L85 PathProgramCache]: Analyzing trace with hash -226124126, now seen corresponding path program 2 times [2024-06-27 19:25:44,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:44,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097144980] [2024-06-27 19:25:44,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:44,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:44,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:44,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:44,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:44,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097144980] [2024-06-27 19:25:44,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097144980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:44,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:44,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:44,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780435120] [2024-06-27 19:25:44,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:44,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:44,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:44,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:44,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:44,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:44,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 99 transitions, 911 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 19:25:44,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:44,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:44,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:44,504 INFO L124 PetriNetUnfolderBase]: 993/1655 cut-off events. [2024-06-27 19:25:44,505 INFO L125 PetriNetUnfolderBase]: For 18270/18270 co-relation queries the response was YES. [2024-06-27 19:25:44,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8453 conditions, 1655 events. 993/1655 cut-off events. For 18270/18270 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8453 event pairs, 306 based on Foata normal form. 2/1652 useless extension candidates. Maximal degree in co-relation 8409. Up to 1347 conditions per place. [2024-06-27 19:25:44,519 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 85 selfloop transitions, 37 changer transitions 0/130 dead transitions. [2024-06-27 19:25:44,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 130 transitions, 1317 flow [2024-06-27 19:25:44,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:44,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:44,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 19:25:44,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-27 19:25:44,521 INFO L175 Difference]: Start difference. First operand has 96 places, 99 transitions, 911 flow. Second operand 7 states and 179 transitions. [2024-06-27 19:25:44,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 130 transitions, 1317 flow [2024-06-27 19:25:44,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 130 transitions, 1247 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 19:25:44,548 INFO L231 Difference]: Finished difference. Result has 97 places, 102 transitions, 957 flow [2024-06-27 19:25:44,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=957, PETRI_PLACES=97, PETRI_TRANSITIONS=102} [2024-06-27 19:25:44,549 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2024-06-27 19:25:44,549 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 102 transitions, 957 flow [2024-06-27 19:25:44,550 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 19:25:44,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:44,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:44,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 19:25:44,550 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 19:25:44,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:44,551 INFO L85 PathProgramCache]: Analyzing trace with hash -225916736, now seen corresponding path program 3 times [2024-06-27 19:25:44,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:44,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385509680] [2024-06-27 19:25:44,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:44,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:44,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:44,646 INFO 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 19:25:44,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:44,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385509680] [2024-06-27 19:25:44,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385509680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:44,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:44,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:25:44,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643453387] [2024-06-27 19:25:44,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:44,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:25:44,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:44,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:25:44,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:25:44,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:44,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 102 transitions, 957 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:44,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:44,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:44,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:44,920 INFO L124 PetriNetUnfolderBase]: 1020/1704 cut-off events. [2024-06-27 19:25:44,921 INFO L125 PetriNetUnfolderBase]: For 20837/20837 co-relation queries the response was YES. [2024-06-27 19:25:44,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8882 conditions, 1704 events. 1020/1704 cut-off events. For 20837/20837 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8754 event pairs, 306 based on Foata normal form. 2/1701 useless extension candidates. Maximal degree in co-relation 8837. Up to 1376 conditions per place. [2024-06-27 19:25:44,935 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 83 selfloop transitions, 43 changer transitions 0/134 dead transitions. [2024-06-27 19:25:44,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 134 transitions, 1477 flow [2024-06-27 19:25:44,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:25:44,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:25:44,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-27 19:25:44,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-27 19:25:44,937 INFO L175 Difference]: Start difference. First operand has 97 places, 102 transitions, 957 flow. Second operand 6 states and 159 transitions. [2024-06-27 19:25:44,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 134 transitions, 1477 flow [2024-06-27 19:25:44,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 134 transitions, 1375 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 19:25:44,967 INFO L231 Difference]: Finished difference. Result has 98 places, 108 transitions, 1029 flow [2024-06-27 19:25:44,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1029, PETRI_PLACES=98, PETRI_TRANSITIONS=108} [2024-06-27 19:25:44,967 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-27 19:25:44,967 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 108 transitions, 1029 flow [2024-06-27 19:25:44,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:44,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:44,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:44,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 19:25:44,968 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 19:25:44,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:44,969 INFO L85 PathProgramCache]: Analyzing trace with hash -225908800, now seen corresponding path program 1 times [2024-06-27 19:25:44,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:44,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565162832] [2024-06-27 19:25:44,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:44,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:44,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:45,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:45,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:45,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565162832] [2024-06-27 19:25:45,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565162832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:45,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:45,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:25:45,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201608915] [2024-06-27 19:25:45,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:45,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:25:45,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:45,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:25:45,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:25:45,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:45,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 108 transitions, 1029 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:45,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:45,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:45,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:45,322 INFO L124 PetriNetUnfolderBase]: 1037/1729 cut-off events. [2024-06-27 19:25:45,323 INFO L125 PetriNetUnfolderBase]: For 23067/23067 co-relation queries the response was YES. [2024-06-27 19:25:45,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9087 conditions, 1729 events. 1037/1729 cut-off events. For 23067/23067 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8890 event pairs, 302 based on Foata normal form. 4/1728 useless extension candidates. Maximal degree in co-relation 9041. Up to 1476 conditions per place. [2024-06-27 19:25:45,339 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 101 selfloop transitions, 24 changer transitions 0/133 dead transitions. [2024-06-27 19:25:45,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 133 transitions, 1357 flow [2024-06-27 19:25:45,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:25:45,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:25:45,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 19:25:45,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-27 19:25:45,341 INFO L175 Difference]: Start difference. First operand has 98 places, 108 transitions, 1029 flow. Second operand 6 states and 153 transitions. [2024-06-27 19:25:45,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 133 transitions, 1357 flow [2024-06-27 19:25:45,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 133 transitions, 1293 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 19:25:45,400 INFO L231 Difference]: Finished difference. Result has 102 places, 110 transitions, 1044 flow [2024-06-27 19:25:45,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=965, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1044, PETRI_PLACES=102, PETRI_TRANSITIONS=110} [2024-06-27 19:25:45,400 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-27 19:25:45,400 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 110 transitions, 1044 flow [2024-06-27 19:25:45,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:45,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:45,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:45,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 19:25:45,401 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 19:25:45,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:45,402 INFO L85 PathProgramCache]: Analyzing trace with hash -2133042500, now seen corresponding path program 4 times [2024-06-27 19:25:45,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:45,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829108146] [2024-06-27 19:25:45,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:45,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:45,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:45,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:45,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829108146] [2024-06-27 19:25:45,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829108146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:45,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:45,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:25:45,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250174267] [2024-06-27 19:25:45,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:45,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:25:45,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:45,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:25:45,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:25:45,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:45,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 110 transitions, 1044 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:45,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:45,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:45,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:45,762 INFO L124 PetriNetUnfolderBase]: 1032/1713 cut-off events. [2024-06-27 19:25:45,762 INFO L125 PetriNetUnfolderBase]: For 25209/25215 co-relation queries the response was YES. [2024-06-27 19:25:45,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9177 conditions, 1713 events. 1032/1713 cut-off events. For 25209/25215 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8881 event pairs, 334 based on Foata normal form. 6/1708 useless extension candidates. Maximal degree in co-relation 9130. Up to 1398 conditions per place. [2024-06-27 19:25:45,786 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 81 selfloop transitions, 43 changer transitions 0/132 dead transitions. [2024-06-27 19:25:45,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 132 transitions, 1427 flow [2024-06-27 19:25:45,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:25:45,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:25:45,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 19:25:45,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-27 19:25:45,790 INFO L175 Difference]: Start difference. First operand has 102 places, 110 transitions, 1044 flow. Second operand 6 states and 153 transitions. [2024-06-27 19:25:45,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 132 transitions, 1427 flow [2024-06-27 19:25:45,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 132 transitions, 1362 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 19:25:45,821 INFO L231 Difference]: Finished difference. Result has 104 places, 111 transitions, 1086 flow [2024-06-27 19:25:45,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=981, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1086, PETRI_PLACES=104, PETRI_TRANSITIONS=111} [2024-06-27 19:25:45,822 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-27 19:25:45,822 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 111 transitions, 1086 flow [2024-06-27 19:25:45,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:45,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:45,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:45,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 19:25:45,823 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 19:25:45,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:45,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1508049312, now seen corresponding path program 5 times [2024-06-27 19:25:45,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:45,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530244666] [2024-06-27 19:25:45,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:45,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:45,929 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 19:25:45,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:45,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530244666] [2024-06-27 19:25:45,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530244666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:45,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:45,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:45,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653198941] [2024-06-27 19:25:45,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:45,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:45,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:45,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:45,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:45,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:45,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 111 transitions, 1086 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 19:25:45,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:45,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:45,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:46,238 INFO L124 PetriNetUnfolderBase]: 1027/1691 cut-off events. [2024-06-27 19:25:46,238 INFO L125 PetriNetUnfolderBase]: For 26983/26983 co-relation queries the response was YES. [2024-06-27 19:25:46,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9240 conditions, 1691 events. 1027/1691 cut-off events. For 26983/26983 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8637 event pairs, 338 based on Foata normal form. 2/1679 useless extension candidates. Maximal degree in co-relation 9192. Up to 1393 conditions per place. [2024-06-27 19:25:46,255 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 80 selfloop transitions, 46 changer transitions 0/134 dead transitions. [2024-06-27 19:25:46,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 134 transitions, 1396 flow [2024-06-27 19:25:46,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:46,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:46,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:25:46,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-27 19:25:46,257 INFO L175 Difference]: Start difference. First operand has 104 places, 111 transitions, 1086 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:25:46,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 134 transitions, 1396 flow [2024-06-27 19:25:46,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 134 transitions, 1318 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 19:25:46,291 INFO L231 Difference]: Finished difference. Result has 108 places, 111 transitions, 1108 flow [2024-06-27 19:25:46,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1008, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1108, PETRI_PLACES=108, PETRI_TRANSITIONS=111} [2024-06-27 19:25:46,291 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-27 19:25:46,292 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 111 transitions, 1108 flow [2024-06-27 19:25:46,292 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 19:25:46,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:46,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:46,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 19:25:46,293 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 19:25:46,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:46,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1581300548, now seen corresponding path program 2 times [2024-06-27 19:25:46,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:46,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610559330] [2024-06-27 19:25:46,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:46,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:46,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:46,407 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 19:25:46,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:46,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610559330] [2024-06-27 19:25:46,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610559330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:46,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:46,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:25:46,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945429126] [2024-06-27 19:25:46,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:46,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:25:46,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:46,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:25:46,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:25:46,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:46,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 111 transitions, 1108 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:46,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:46,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:46,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:46,690 INFO L124 PetriNetUnfolderBase]: 1044/1748 cut-off events. [2024-06-27 19:25:46,690 INFO L125 PetriNetUnfolderBase]: For 30029/30035 co-relation queries the response was YES. [2024-06-27 19:25:46,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9511 conditions, 1748 events. 1044/1748 cut-off events. For 30029/30035 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 9108 event pairs, 320 based on Foata normal form. 8/1749 useless extension candidates. Maximal degree in co-relation 9461. Up to 1489 conditions per place. [2024-06-27 19:25:46,709 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 102 selfloop transitions, 23 changer transitions 0/133 dead transitions. [2024-06-27 19:25:46,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 133 transitions, 1432 flow [2024-06-27 19:25:46,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:25:46,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:25:46,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 19:25:46,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-27 19:25:46,711 INFO L175 Difference]: Start difference. First operand has 108 places, 111 transitions, 1108 flow. Second operand 6 states and 149 transitions. [2024-06-27 19:25:46,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 133 transitions, 1432 flow [2024-06-27 19:25:46,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 133 transitions, 1330 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 19:25:46,750 INFO L231 Difference]: Finished difference. Result has 109 places, 113 transitions, 1087 flow [2024-06-27 19:25:46,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1006, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1087, PETRI_PLACES=109, PETRI_TRANSITIONS=113} [2024-06-27 19:25:46,751 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-27 19:25:46,751 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 113 transitions, 1087 flow [2024-06-27 19:25:46,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:46,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:46,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:46,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 19:25:46,752 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:46,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:46,752 INFO L85 PathProgramCache]: Analyzing trace with hash -2123511364, now seen corresponding path program 3 times [2024-06-27 19:25:46,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:46,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577482980] [2024-06-27 19:25:46,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:46,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:46,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:46,851 INFO 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 19:25:46,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:46,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577482980] [2024-06-27 19:25:46,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577482980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:46,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:46,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:25:46,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303866581] [2024-06-27 19:25:46,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:46,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:25:46,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:46,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:25:46,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:25:46,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:46,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 113 transitions, 1087 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:46,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:46,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:46,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:47,133 INFO L124 PetriNetUnfolderBase]: 1036/1736 cut-off events. [2024-06-27 19:25:47,133 INFO L125 PetriNetUnfolderBase]: For 31485/31491 co-relation queries the response was YES. [2024-06-27 19:25:47,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9511 conditions, 1736 events. 1036/1736 cut-off events. For 31485/31491 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9061 event pairs, 289 based on Foata normal form. 8/1737 useless extension candidates. Maximal degree in co-relation 9460. Up to 1418 conditions per place. [2024-06-27 19:25:47,149 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 100 selfloop transitions, 28 changer transitions 0/136 dead transitions. [2024-06-27 19:25:47,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 136 transitions, 1423 flow [2024-06-27 19:25:47,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:25:47,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:25:47,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 19:25:47,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:25:47,152 INFO L175 Difference]: Start difference. First operand has 109 places, 113 transitions, 1087 flow. Second operand 6 states and 150 transitions. [2024-06-27 19:25:47,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 136 transitions, 1423 flow [2024-06-27 19:25:47,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 136 transitions, 1360 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 19:25:47,192 INFO L231 Difference]: Finished difference. Result has 111 places, 115 transitions, 1119 flow [2024-06-27 19:25:47,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1119, PETRI_PLACES=111, PETRI_TRANSITIONS=115} [2024-06-27 19:25:47,193 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-27 19:25:47,193 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 115 transitions, 1119 flow [2024-06-27 19:25:47,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:47,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:47,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:47,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 19:25:47,193 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 19:25:47,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:47,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1153123088, now seen corresponding path program 1 times [2024-06-27 19:25:47,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:47,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963052382] [2024-06-27 19:25:47,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:47,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:47,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:47,280 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 19:25:47,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:47,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963052382] [2024-06-27 19:25:47,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963052382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:47,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:47,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:25:47,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21301696] [2024-06-27 19:25:47,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:47,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:25:47,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:47,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:25:47,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:25:47,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:47,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 115 transitions, 1119 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 19:25:47,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:47,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:47,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:47,558 INFO L124 PetriNetUnfolderBase]: 1041/1730 cut-off events. [2024-06-27 19:25:47,559 INFO L125 PetriNetUnfolderBase]: For 32573/32573 co-relation queries the response was YES. [2024-06-27 19:25:47,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9741 conditions, 1730 events. 1041/1730 cut-off events. For 32573/32573 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8895 event pairs, 301 based on Foata normal form. 1/1727 useless extension candidates. Maximal degree in co-relation 9689. Up to 1539 conditions per place. [2024-06-27 19:25:47,575 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 110 selfloop transitions, 20 changer transitions 0/138 dead transitions. [2024-06-27 19:25:47,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 138 transitions, 1599 flow [2024-06-27 19:25:47,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:25:47,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:25:47,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-27 19:25:47,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:25:47,576 INFO L175 Difference]: Start difference. First operand has 111 places, 115 transitions, 1119 flow. Second operand 5 states and 125 transitions. [2024-06-27 19:25:47,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 138 transitions, 1599 flow [2024-06-27 19:25:47,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 138 transitions, 1522 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 19:25:47,621 INFO L231 Difference]: Finished difference. Result has 113 places, 124 transitions, 1208 flow [2024-06-27 19:25:47,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1042, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1208, PETRI_PLACES=113, PETRI_TRANSITIONS=124} [2024-06-27 19:25:47,622 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-27 19:25:47,622 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 124 transitions, 1208 flow [2024-06-27 19:25:47,623 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 19:25:47,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:47,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:47,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 19:25:47,623 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 19:25:47,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:47,624 INFO L85 PathProgramCache]: Analyzing trace with hash -867863842, now seen corresponding path program 2 times [2024-06-27 19:25:47,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:47,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742740990] [2024-06-27 19:25:47,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:47,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:47,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:47,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:47,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742740990] [2024-06-27 19:25:47,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742740990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:47,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:47,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:25:47,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536085140] [2024-06-27 19:25:47,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:47,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:25:47,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:47,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:25:47,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:25:47,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:47,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 124 transitions, 1208 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 19:25:47,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:47,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:47,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:47,942 INFO L124 PetriNetUnfolderBase]: 1046/1746 cut-off events. [2024-06-27 19:25:47,943 INFO L125 PetriNetUnfolderBase]: For 35145/35145 co-relation queries the response was YES. [2024-06-27 19:25:47,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10066 conditions, 1746 events. 1046/1746 cut-off events. For 35145/35145 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9019 event pairs, 299 based on Foata normal form. 1/1745 useless extension candidates. Maximal degree in co-relation 10012. Up to 1555 conditions per place. [2024-06-27 19:25:47,961 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 117 selfloop transitions, 18 changer transitions 0/143 dead transitions. [2024-06-27 19:25:47,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 143 transitions, 1603 flow [2024-06-27 19:25:47,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:25:47,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:25:47,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-27 19:25:47,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195121951219512 [2024-06-27 19:25:47,964 INFO L175 Difference]: Start difference. First operand has 113 places, 124 transitions, 1208 flow. Second operand 5 states and 127 transitions. [2024-06-27 19:25:47,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 143 transitions, 1603 flow [2024-06-27 19:25:48,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 143 transitions, 1537 flow, removed 33 selfloop flow, removed 0 redundant places. [2024-06-27 19:25:48,022 INFO L231 Difference]: Finished difference. Result has 119 places, 127 transitions, 1241 flow [2024-06-27 19:25:48,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1148, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1241, PETRI_PLACES=119, PETRI_TRANSITIONS=127} [2024-06-27 19:25:48,023 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-27 19:25:48,023 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 127 transitions, 1241 flow [2024-06-27 19:25:48,024 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 19:25:48,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:48,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:48,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 19:25:48,024 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:48,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:48,025 INFO L85 PathProgramCache]: Analyzing trace with hash 846380170, now seen corresponding path program 1 times [2024-06-27 19:25:48,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:48,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135560314] [2024-06-27 19:25:48,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:48,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:48,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:48,142 INFO 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 19:25:48,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:48,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135560314] [2024-06-27 19:25:48,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135560314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:48,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:48,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:48,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845618064] [2024-06-27 19:25:48,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:48,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:48,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:48,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:48,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:48,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:48,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 127 transitions, 1241 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 19:25:48,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:48,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:48,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:48,578 INFO L124 PetriNetUnfolderBase]: 1450/2394 cut-off events. [2024-06-27 19:25:48,579 INFO L125 PetriNetUnfolderBase]: For 62810/62810 co-relation queries the response was YES. [2024-06-27 19:25:48,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14367 conditions, 2394 events. 1450/2394 cut-off events. For 62810/62810 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13079 event pairs, 330 based on Foata normal form. 14/2404 useless extension candidates. Maximal degree in co-relation 14309. Up to 1444 conditions per place. [2024-06-27 19:25:48,601 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 133 selfloop transitions, 40 changer transitions 0/181 dead transitions. [2024-06-27 19:25:48,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 181 transitions, 1931 flow [2024-06-27 19:25:48,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:25:48,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:25:48,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-27 19:25:48,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6707317073170732 [2024-06-27 19:25:48,602 INFO L175 Difference]: Start difference. First operand has 119 places, 127 transitions, 1241 flow. Second operand 8 states and 220 transitions. [2024-06-27 19:25:48,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 181 transitions, 1931 flow [2024-06-27 19:25:48,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 181 transitions, 1899 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 19:25:48,688 INFO L231 Difference]: Finished difference. Result has 125 places, 134 transitions, 1413 flow [2024-06-27 19:25:48,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1209, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1413, PETRI_PLACES=125, PETRI_TRANSITIONS=134} [2024-06-27 19:25:48,689 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-27 19:25:48,689 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 134 transitions, 1413 flow [2024-06-27 19:25:48,689 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 19:25:48,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:48,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:48,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 19:25:48,690 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:48,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:48,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1409380650, now seen corresponding path program 2 times [2024-06-27 19:25:48,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:48,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124054394] [2024-06-27 19:25:48,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:48,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:48,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:48,792 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 19:25:48,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:48,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124054394] [2024-06-27 19:25:48,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124054394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:48,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:48,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:48,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512599987] [2024-06-27 19:25:48,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:48,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:48,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:48,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:48,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:48,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:48,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 134 transitions, 1413 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 19:25:48,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:48,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:48,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:49,214 INFO L124 PetriNetUnfolderBase]: 1419/2349 cut-off events. [2024-06-27 19:25:49,215 INFO L125 PetriNetUnfolderBase]: For 64230/64230 co-relation queries the response was YES. [2024-06-27 19:25:49,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14497 conditions, 2349 events. 1419/2349 cut-off events. For 64230/64230 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12780 event pairs, 419 based on Foata normal form. 14/2359 useless extension candidates. Maximal degree in co-relation 14437. Up to 2032 conditions per place. [2024-06-27 19:25:49,239 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 129 selfloop transitions, 38 changer transitions 0/175 dead transitions. [2024-06-27 19:25:49,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 175 transitions, 1917 flow [2024-06-27 19:25:49,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:25:49,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:25:49,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-27 19:25:49,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-27 19:25:49,241 INFO L175 Difference]: Start difference. First operand has 125 places, 134 transitions, 1413 flow. Second operand 8 states and 212 transitions. [2024-06-27 19:25:49,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 175 transitions, 1917 flow [2024-06-27 19:25:49,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 175 transitions, 1829 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 19:25:49,334 INFO L231 Difference]: Finished difference. Result has 129 places, 137 transitions, 1473 flow [2024-06-27 19:25:49,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1329, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1473, PETRI_PLACES=129, PETRI_TRANSITIONS=137} [2024-06-27 19:25:49,335 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2024-06-27 19:25:49,335 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 137 transitions, 1473 flow [2024-06-27 19:25:49,335 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 19:25:49,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:49,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:49,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 19:25:49,336 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:49,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:49,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1580083080, now seen corresponding path program 3 times [2024-06-27 19:25:49,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:49,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568290378] [2024-06-27 19:25:49,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:49,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:49,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:49,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:49,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:49,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568290378] [2024-06-27 19:25:49,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568290378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:49,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:49,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:49,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105467025] [2024-06-27 19:25:49,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:49,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:49,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:49,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:49,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:49,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:49,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 137 transitions, 1473 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 19:25:49,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:49,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:49,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:49,824 INFO L124 PetriNetUnfolderBase]: 1436/2378 cut-off events. [2024-06-27 19:25:49,824 INFO L125 PetriNetUnfolderBase]: For 66644/66644 co-relation queries the response was YES. [2024-06-27 19:25:49,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14822 conditions, 2378 events. 1436/2378 cut-off events. For 66644/66644 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 13017 event pairs, 423 based on Foata normal form. 4/2377 useless extension candidates. Maximal degree in co-relation 14760. Up to 2026 conditions per place. [2024-06-27 19:25:49,841 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 112 selfloop transitions, 46 changer transitions 0/166 dead transitions. [2024-06-27 19:25:49,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 166 transitions, 1899 flow [2024-06-27 19:25:49,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:49,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:49,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 19:25:49,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-27 19:25:49,843 INFO L175 Difference]: Start difference. First operand has 129 places, 137 transitions, 1473 flow. Second operand 7 states and 177 transitions. [2024-06-27 19:25:49,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 166 transitions, 1899 flow [2024-06-27 19:25:49,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 166 transitions, 1793 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 19:25:49,928 INFO L231 Difference]: Finished difference. Result has 130 places, 139 transitions, 1512 flow [2024-06-27 19:25:49,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1367, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1512, PETRI_PLACES=130, PETRI_TRANSITIONS=139} [2024-06-27 19:25:49,928 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-27 19:25:49,929 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 139 transitions, 1512 flow [2024-06-27 19:25:49,929 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 19:25:49,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:49,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:49,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 19:25:49,929 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:49,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:49,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1067821974, now seen corresponding path program 4 times [2024-06-27 19:25:49,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:49,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479815595] [2024-06-27 19:25:49,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:49,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:49,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:50,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:50,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:50,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479815595] [2024-06-27 19:25:50,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479815595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:50,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:50,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:50,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325528990] [2024-06-27 19:25:50,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:50,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:50,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:50,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:50,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:50,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:50,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 139 transitions, 1512 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 19:25:50,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:50,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:50,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:50,430 INFO L124 PetriNetUnfolderBase]: 1428/2339 cut-off events. [2024-06-27 19:25:50,431 INFO L125 PetriNetUnfolderBase]: For 69737/69737 co-relation queries the response was YES. [2024-06-27 19:25:50,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14631 conditions, 2339 events. 1428/2339 cut-off events. For 69737/69737 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12751 event pairs, 459 based on Foata normal form. 4/2327 useless extension candidates. Maximal degree in co-relation 14568. Up to 2014 conditions per place. [2024-06-27 19:25:50,449 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 109 selfloop transitions, 48 changer transitions 0/165 dead transitions. [2024-06-27 19:25:50,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 165 transitions, 1932 flow [2024-06-27 19:25:50,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:50,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:50,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:25:50,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-27 19:25:50,451 INFO L175 Difference]: Start difference. First operand has 130 places, 139 transitions, 1512 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:25:50,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 165 transitions, 1932 flow [2024-06-27 19:25:50,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 165 transitions, 1803 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 19:25:50,532 INFO L231 Difference]: Finished difference. Result has 132 places, 141 transitions, 1536 flow [2024-06-27 19:25:50,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1383, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1536, PETRI_PLACES=132, PETRI_TRANSITIONS=141} [2024-06-27 19:25:50,533 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-27 19:25:50,533 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 141 transitions, 1536 flow [2024-06-27 19:25:50,533 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 19:25:50,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:50,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:50,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 19:25:50,534 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 19:25:50,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:50,534 INFO L85 PathProgramCache]: Analyzing trace with hash 877155941, now seen corresponding path program 1 times [2024-06-27 19:25:50,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:50,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666099331] [2024-06-27 19:25:50,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:50,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:50,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:50,615 INFO 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 19:25:50,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:50,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666099331] [2024-06-27 19:25:50,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666099331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:50,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:50,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:25:50,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499158187] [2024-06-27 19:25:50,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:50,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:25:50,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:50,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:25:50,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:25:50,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:50,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 141 transitions, 1536 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:50,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:50,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:50,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:50,941 INFO L124 PetriNetUnfolderBase]: 1433/2376 cut-off events. [2024-06-27 19:25:50,941 INFO L125 PetriNetUnfolderBase]: For 72562/72568 co-relation queries the response was YES. [2024-06-27 19:25:50,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14823 conditions, 2376 events. 1433/2376 cut-off events. For 72562/72568 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13016 event pairs, 419 based on Foata normal form. 5/2378 useless extension candidates. Maximal degree in co-relation 14759. Up to 2162 conditions per place. [2024-06-27 19:25:50,965 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 125 selfloop transitions, 24 changer transitions 0/157 dead transitions. [2024-06-27 19:25:50,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 157 transitions, 1961 flow [2024-06-27 19:25:50,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:25:50,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:25:50,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-27 19:25:50,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6048780487804878 [2024-06-27 19:25:50,966 INFO L175 Difference]: Start difference. First operand has 132 places, 141 transitions, 1536 flow. Second operand 5 states and 124 transitions. [2024-06-27 19:25:50,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 157 transitions, 1961 flow [2024-06-27 19:25:51,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 157 transitions, 1826 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 19:25:51,118 INFO L231 Difference]: Finished difference. Result has 132 places, 144 transitions, 1494 flow [2024-06-27 19:25:51,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1401, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1494, PETRI_PLACES=132, PETRI_TRANSITIONS=144} [2024-06-27 19:25:51,119 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-27 19:25:51,120 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 144 transitions, 1494 flow [2024-06-27 19:25:51,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:51,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:51,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:51,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 19:25:51,120 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 19:25:51,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:51,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1408326003, now seen corresponding path program 2 times [2024-06-27 19:25:51,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:51,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513352628] [2024-06-27 19:25:51,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:51,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:51,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:51,206 INFO 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 19:25:51,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:51,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513352628] [2024-06-27 19:25:51,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513352628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:51,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:51,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:25:51,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341161958] [2024-06-27 19:25:51,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:51,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:25:51,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:51,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:25:51,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:25:51,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:51,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 144 transitions, 1494 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 19:25:51,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:51,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:51,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:51,501 INFO L124 PetriNetUnfolderBase]: 1430/2368 cut-off events. [2024-06-27 19:25:51,501 INFO L125 PetriNetUnfolderBase]: For 74855/74855 co-relation queries the response was YES. [2024-06-27 19:25:51,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14650 conditions, 2368 events. 1430/2368 cut-off events. For 74855/74855 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12967 event pairs, 419 based on Foata normal form. 1/2365 useless extension candidates. Maximal degree in co-relation 14585. Up to 2159 conditions per place. [2024-06-27 19:25:51,518 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 124 selfloop transitions, 26 changer transitions 0/158 dead transitions. [2024-06-27 19:25:51,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 158 transitions, 1886 flow [2024-06-27 19:25:51,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:25:51,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:25:51,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 19:25:51,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-27 19:25:51,519 INFO L175 Difference]: Start difference. First operand has 132 places, 144 transitions, 1494 flow. Second operand 6 states and 143 transitions. [2024-06-27 19:25:51,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 158 transitions, 1886 flow [2024-06-27 19:25:51,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 158 transitions, 1806 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 19:25:51,599 INFO L231 Difference]: Finished difference. Result has 135 places, 144 transitions, 1472 flow [2024-06-27 19:25:51,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1414, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1472, PETRI_PLACES=135, PETRI_TRANSITIONS=144} [2024-06-27 19:25:51,600 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-27 19:25:51,600 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 144 transitions, 1472 flow [2024-06-27 19:25:51,600 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 19:25:51,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:51,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:51,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 19:25:51,601 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 19:25:51,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:51,601 INFO L85 PathProgramCache]: Analyzing trace with hash 791184635, now seen corresponding path program 1 times [2024-06-27 19:25:51,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:51,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437965128] [2024-06-27 19:25:51,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:51,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:51,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:51,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:51,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:51,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437965128] [2024-06-27 19:25:51,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437965128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:51,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:51,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:25:51,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036780200] [2024-06-27 19:25:51,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:51,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:25:51,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:51,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:25:51,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:25:51,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:51,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 144 transitions, 1472 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 19:25:51,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:51,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:51,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:52,036 INFO L124 PetriNetUnfolderBase]: 1458/2419 cut-off events. [2024-06-27 19:25:52,036 INFO L125 PetriNetUnfolderBase]: For 81776/81776 co-relation queries the response was YES. [2024-06-27 19:25:52,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15138 conditions, 2419 events. 1458/2419 cut-off events. For 81776/81776 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 13394 event pairs, 435 based on Foata normal form. 2/2413 useless extension candidates. Maximal degree in co-relation 15073. Up to 2035 conditions per place. [2024-06-27 19:25:52,054 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 129 selfloop transitions, 43 changer transitions 0/180 dead transitions. [2024-06-27 19:25:52,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 180 transitions, 2282 flow [2024-06-27 19:25:52,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:25:52,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:25:52,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 19:25:52,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-27 19:25:52,056 INFO L175 Difference]: Start difference. First operand has 135 places, 144 transitions, 1472 flow. Second operand 6 states and 152 transitions. [2024-06-27 19:25:52,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 180 transitions, 2282 flow [2024-06-27 19:25:52,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 180 transitions, 2194 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 19:25:52,143 INFO L231 Difference]: Finished difference. Result has 137 places, 160 transitions, 1729 flow [2024-06-27 19:25:52,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1384, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1729, PETRI_PLACES=137, PETRI_TRANSITIONS=160} [2024-06-27 19:25:52,143 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-27 19:25:52,143 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 160 transitions, 1729 flow [2024-06-27 19:25:52,144 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 19:25:52,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:52,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:52,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 19:25:52,144 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 19:25:52,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:52,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1477742069, now seen corresponding path program 3 times [2024-06-27 19:25:52,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:52,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042708671] [2024-06-27 19:25:52,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:52,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:52,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:52,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:52,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:52,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042708671] [2024-06-27 19:25:52,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042708671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:52,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:52,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:25:52,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207413093] [2024-06-27 19:25:52,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:52,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:25:52,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:52,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:25:52,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:25:52,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:52,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 160 transitions, 1729 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:52,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:52,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:52,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:52,514 INFO L124 PetriNetUnfolderBase]: 1455/2409 cut-off events. [2024-06-27 19:25:52,514 INFO L125 PetriNetUnfolderBase]: For 85932/85932 co-relation queries the response was YES. [2024-06-27 19:25:52,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15807 conditions, 2409 events. 1455/2409 cut-off events. For 85932/85932 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13202 event pairs, 411 based on Foata normal form. 1/2408 useless extension candidates. Maximal degree in co-relation 15740. Up to 2204 conditions per place. [2024-06-27 19:25:52,573 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 149 selfloop transitions, 18 changer transitions 0/175 dead transitions. [2024-06-27 19:25:52,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 175 transitions, 2101 flow [2024-06-27 19:25:52,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:25:52,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:25:52,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-27 19:25:52,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146341463414634 [2024-06-27 19:25:52,574 INFO L175 Difference]: Start difference. First operand has 137 places, 160 transitions, 1729 flow. Second operand 5 states and 126 transitions. [2024-06-27 19:25:52,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 175 transitions, 2101 flow [2024-06-27 19:25:52,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 175 transitions, 2023 flow, removed 39 selfloop flow, removed 0 redundant places. [2024-06-27 19:25:52,670 INFO L231 Difference]: Finished difference. Result has 142 places, 160 transitions, 1697 flow [2024-06-27 19:25:52,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1651, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1697, PETRI_PLACES=142, PETRI_TRANSITIONS=160} [2024-06-27 19:25:52,671 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-27 19:25:52,671 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 160 transitions, 1697 flow [2024-06-27 19:25:52,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:52,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:52,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:52,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 19:25:52,671 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 19:25:52,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:52,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1462785995, now seen corresponding path program 2 times [2024-06-27 19:25:52,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:52,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756937004] [2024-06-27 19:25:52,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:52,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:52,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:52,750 INFO 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 19:25:52,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:52,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756937004] [2024-06-27 19:25:52,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756937004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:52,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:52,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:25:52,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994860347] [2024-06-27 19:25:52,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:52,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:25:52,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:52,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:25:52,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:25:52,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:52,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 160 transitions, 1697 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 19:25:52,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:52,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:52,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:53,083 INFO L124 PetriNetUnfolderBase]: 1526/2530 cut-off events. [2024-06-27 19:25:53,083 INFO L125 PetriNetUnfolderBase]: For 94766/94766 co-relation queries the response was YES. [2024-06-27 19:25:53,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16628 conditions, 2530 events. 1526/2530 cut-off events. For 94766/94766 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14143 event pairs, 431 based on Foata normal form. 3/2527 useless extension candidates. Maximal degree in co-relation 16558. Up to 2094 conditions per place. [2024-06-27 19:25:53,103 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 121 selfloop transitions, 70 changer transitions 0/199 dead transitions. [2024-06-27 19:25:53,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 199 transitions, 2558 flow [2024-06-27 19:25:53,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:53,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:53,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 19:25:53,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-27 19:25:53,105 INFO L175 Difference]: Start difference. First operand has 142 places, 160 transitions, 1697 flow. Second operand 7 states and 176 transitions. [2024-06-27 19:25:53,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 199 transitions, 2558 flow [2024-06-27 19:25:53,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 199 transitions, 2522 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 19:25:53,216 INFO L231 Difference]: Finished difference. Result has 147 places, 180 transitions, 2137 flow [2024-06-27 19:25:53,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1661, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2137, PETRI_PLACES=147, PETRI_TRANSITIONS=180} [2024-06-27 19:25:53,217 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-27 19:25:53,217 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 180 transitions, 2137 flow [2024-06-27 19:25:53,217 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 19:25:53,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:53,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:53,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 19:25:53,218 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 19:25:53,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:53,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1462548845, now seen corresponding path program 3 times [2024-06-27 19:25:53,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:53,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564298888] [2024-06-27 19:25:53,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:53,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:53,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:53,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564298888] [2024-06-27 19:25:53,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564298888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:53,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:53,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:25:53,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617527124] [2024-06-27 19:25:53,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:53,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:25:53,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:53,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:25:53,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:25:53,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:53,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 180 transitions, 2137 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 19:25:53,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:53,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:53,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:53,776 INFO L124 PetriNetUnfolderBase]: 1519/2526 cut-off events. [2024-06-27 19:25:53,777 INFO L125 PetriNetUnfolderBase]: For 101352/101352 co-relation queries the response was YES. [2024-06-27 19:25:53,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17508 conditions, 2526 events. 1519/2526 cut-off events. For 101352/101352 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14187 event pairs, 432 based on Foata normal form. 3/2523 useless extension candidates. Maximal degree in co-relation 17435. Up to 2091 conditions per place. [2024-06-27 19:25:53,809 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 123 selfloop transitions, 74 changer transitions 0/205 dead transitions. [2024-06-27 19:25:53,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 205 transitions, 2843 flow [2024-06-27 19:25:53,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:25:53,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:25:53,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-27 19:25:53,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422764227642277 [2024-06-27 19:25:53,811 INFO L175 Difference]: Start difference. First operand has 147 places, 180 transitions, 2137 flow. Second operand 6 states and 158 transitions. [2024-06-27 19:25:53,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 205 transitions, 2843 flow [2024-06-27 19:25:53,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 205 transitions, 2668 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-27 19:25:53,963 INFO L231 Difference]: Finished difference. Result has 151 places, 186 transitions, 2281 flow [2024-06-27 19:25:53,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1978, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2281, PETRI_PLACES=151, PETRI_TRANSITIONS=186} [2024-06-27 19:25:53,963 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-27 19:25:53,963 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 186 transitions, 2281 flow [2024-06-27 19:25:53,964 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 19:25:53,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:53,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:53,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 19:25:53,964 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 19:25:53,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:53,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1462794923, now seen corresponding path program 1 times [2024-06-27 19:25:53,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:53,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763322084] [2024-06-27 19:25:53,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:53,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:53,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:54,053 INFO 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 19:25:54,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:54,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763322084] [2024-06-27 19:25:54,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763322084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:54,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:54,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:25:54,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933717968] [2024-06-27 19:25:54,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:54,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:25:54,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:54,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:25:54,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:25:54,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:25:54,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 186 transitions, 2281 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:54,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:54,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:25:54,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:54,405 INFO L124 PetriNetUnfolderBase]: 1485/2500 cut-off events. [2024-06-27 19:25:54,405 INFO L125 PetriNetUnfolderBase]: For 110686/110691 co-relation queries the response was YES. [2024-06-27 19:25:54,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17474 conditions, 2500 events. 1485/2500 cut-off events. For 110686/110691 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14216 event pairs, 427 based on Foata normal form. 17/2506 useless extension candidates. Maximal degree in co-relation 17399. Up to 2109 conditions per place. [2024-06-27 19:25:54,424 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 153 selfloop transitions, 22 changer transitions 0/201 dead transitions. [2024-06-27 19:25:54,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 201 transitions, 2699 flow [2024-06-27 19:25:54,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:25:54,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:25:54,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-27 19:25:54,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624390243902439 [2024-06-27 19:25:54,425 INFO L175 Difference]: Start difference. First operand has 151 places, 186 transitions, 2281 flow. Second operand 5 states and 128 transitions. [2024-06-27 19:25:54,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 201 transitions, 2699 flow [2024-06-27 19:25:54,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 201 transitions, 2570 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-27 19:25:54,561 INFO L231 Difference]: Finished difference. Result has 154 places, 188 transitions, 2229 flow [2024-06-27 19:25:54,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2152, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2229, PETRI_PLACES=154, PETRI_TRANSITIONS=188} [2024-06-27 19:25:54,561 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-27 19:25:54,562 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 188 transitions, 2229 flow [2024-06-27 19:25:54,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:54,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:54,562 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 19:25:54,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 19:25:54,562 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:54,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:54,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1532118627, now seen corresponding path program 1 times [2024-06-27 19:25:54,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:54,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621503476] [2024-06-27 19:25:54,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:54,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:54,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:54,659 INFO 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 19:25:54,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:54,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621503476] [2024-06-27 19:25:54,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621503476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:54,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:54,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:54,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702188577] [2024-06-27 19:25:54,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:54,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:54,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:54,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:54,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:54,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:54,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 188 transitions, 2229 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:54,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:54,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:54,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:55,134 INFO L124 PetriNetUnfolderBase]: 1679/2816 cut-off events. [2024-06-27 19:25:55,134 INFO L125 PetriNetUnfolderBase]: For 135834/135834 co-relation queries the response was YES. [2024-06-27 19:25:55,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18898 conditions, 2816 events. 1679/2816 cut-off events. For 135834/135834 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 16102 event pairs, 327 based on Foata normal form. 42/2854 useless extension candidates. Maximal degree in co-relation 18822. Up to 1655 conditions per place. [2024-06-27 19:25:55,156 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 181 selfloop transitions, 44 changer transitions 5/238 dead transitions. [2024-06-27 19:25:55,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 238 transitions, 3028 flow [2024-06-27 19:25:55,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:25:55,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:25:55,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-27 19:25:55,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6737804878048781 [2024-06-27 19:25:55,157 INFO L175 Difference]: Start difference. First operand has 154 places, 188 transitions, 2229 flow. Second operand 8 states and 221 transitions. [2024-06-27 19:25:55,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 238 transitions, 3028 flow [2024-06-27 19:25:55,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 238 transitions, 2973 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 19:25:55,284 INFO L231 Difference]: Finished difference. Result has 159 places, 188 transitions, 2281 flow [2024-06-27 19:25:55,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2174, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2281, PETRI_PLACES=159, PETRI_TRANSITIONS=188} [2024-06-27 19:25:55,284 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 117 predicate places. [2024-06-27 19:25:55,284 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 188 transitions, 2281 flow [2024-06-27 19:25:55,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:55,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:55,285 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 19:25:55,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 19:25:55,285 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:55,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:55,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1619179585, now seen corresponding path program 2 times [2024-06-27 19:25:55,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:55,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279001706] [2024-06-27 19:25:55,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:55,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:55,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:55,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:55,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279001706] [2024-06-27 19:25:55,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279001706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:55,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:55,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:55,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16754224] [2024-06-27 19:25:55,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:55,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:55,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:55,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:55,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:55,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:55,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 188 transitions, 2281 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:55,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:55,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:55,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:55,773 INFO L124 PetriNetUnfolderBase]: 1534/2585 cut-off events. [2024-06-27 19:25:55,773 INFO L125 PetriNetUnfolderBase]: For 115736/115736 co-relation queries the response was YES. [2024-06-27 19:25:55,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16545 conditions, 2585 events. 1534/2585 cut-off events. For 115736/115736 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 14556 event pairs, 390 based on Foata normal form. 50/2631 useless extension candidates. Maximal degree in co-relation 16468. Up to 2021 conditions per place. [2024-06-27 19:25:55,792 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 182 selfloop transitions, 36 changer transitions 3/229 dead transitions. [2024-06-27 19:25:55,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 229 transitions, 2887 flow [2024-06-27 19:25:55,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:25:55,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:25:55,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-27 19:25:55,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6432926829268293 [2024-06-27 19:25:55,793 INFO L175 Difference]: Start difference. First operand has 159 places, 188 transitions, 2281 flow. Second operand 8 states and 211 transitions. [2024-06-27 19:25:55,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 229 transitions, 2887 flow [2024-06-27 19:25:55,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 229 transitions, 2770 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 19:25:55,978 INFO L231 Difference]: Finished difference. Result has 162 places, 188 transitions, 2258 flow [2024-06-27 19:25:55,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2175, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2258, PETRI_PLACES=162, PETRI_TRANSITIONS=188} [2024-06-27 19:25:55,979 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-27 19:25:55,979 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 188 transitions, 2258 flow [2024-06-27 19:25:55,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:55,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:55,979 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 19:25:55,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 19:25:55,979 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:55,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:55,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1937386207, now seen corresponding path program 3 times [2024-06-27 19:25:55,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:55,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963374168] [2024-06-27 19:25:55,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:55,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:56,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:56,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:56,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963374168] [2024-06-27 19:25:56,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963374168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:56,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:56,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:56,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658705415] [2024-06-27 19:25:56,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:56,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:56,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:56,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:56,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:56,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:56,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 188 transitions, 2258 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:56,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:56,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:56,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:56,527 INFO L124 PetriNetUnfolderBase]: 1582/2681 cut-off events. [2024-06-27 19:25:56,527 INFO L125 PetriNetUnfolderBase]: For 99088/99088 co-relation queries the response was YES. [2024-06-27 19:25:56,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16848 conditions, 2681 events. 1582/2681 cut-off events. For 99088/99088 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 15293 event pairs, 411 based on Foata normal form. 16/2692 useless extension candidates. Maximal degree in co-relation 16770. Up to 2200 conditions per place. [2024-06-27 19:25:56,547 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 166 selfloop transitions, 45 changer transitions 0/219 dead transitions. [2024-06-27 19:25:56,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 219 transitions, 2798 flow [2024-06-27 19:25:56,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:56,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:56,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 19:25:56,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-27 19:25:56,549 INFO L175 Difference]: Start difference. First operand has 162 places, 188 transitions, 2258 flow. Second operand 7 states and 179 transitions. [2024-06-27 19:25:56,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 219 transitions, 2798 flow [2024-06-27 19:25:56,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 219 transitions, 2726 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 19:25:56,700 INFO L231 Difference]: Finished difference. Result has 163 places, 189 transitions, 2311 flow [2024-06-27 19:25:56,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2186, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2311, PETRI_PLACES=163, PETRI_TRANSITIONS=189} [2024-06-27 19:25:56,700 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-27 19:25:56,700 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 189 transitions, 2311 flow [2024-06-27 19:25:56,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:56,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:56,700 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 19:25:56,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 19:25:56,700 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:56,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:56,701 INFO L85 PathProgramCache]: Analyzing trace with hash 675601279, now seen corresponding path program 4 times [2024-06-27 19:25:56,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:56,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797840318] [2024-06-27 19:25:56,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:56,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:56,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:56,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:56,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:56,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797840318] [2024-06-27 19:25:56,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797840318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:56,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:56,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:25:56,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880251536] [2024-06-27 19:25:56,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:56,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:25:56,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:56,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:25:56,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:25:56,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:56,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 189 transitions, 2311 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:56,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:56,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:56,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:57,331 INFO L124 PetriNetUnfolderBase]: 1640/2787 cut-off events. [2024-06-27 19:25:57,331 INFO L125 PetriNetUnfolderBase]: For 105268/105268 co-relation queries the response was YES. [2024-06-27 19:25:57,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17516 conditions, 2787 events. 1640/2787 cut-off events. For 105268/105268 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16060 event pairs, 426 based on Foata normal form. 16/2798 useless extension candidates. Maximal degree in co-relation 17437. Up to 2298 conditions per place. [2024-06-27 19:25:57,349 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 171 selfloop transitions, 45 changer transitions 0/224 dead transitions. [2024-06-27 19:25:57,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 224 transitions, 2873 flow [2024-06-27 19:25:57,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:25:57,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:25:57,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-27 19:25:57,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-27 19:25:57,350 INFO L175 Difference]: Start difference. First operand has 163 places, 189 transitions, 2311 flow. Second operand 8 states and 201 transitions. [2024-06-27 19:25:57,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 224 transitions, 2873 flow [2024-06-27 19:25:57,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 224 transitions, 2766 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 19:25:57,490 INFO L231 Difference]: Finished difference. Result has 166 places, 190 transitions, 2331 flow [2024-06-27 19:25:57,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2204, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2331, PETRI_PLACES=166, PETRI_TRANSITIONS=190} [2024-06-27 19:25:57,491 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-27 19:25:57,491 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 190 transitions, 2331 flow [2024-06-27 19:25:57,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:57,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:57,491 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 19:25:57,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 19:25:57,491 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:57,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:57,492 INFO L85 PathProgramCache]: Analyzing trace with hash -2100199249, now seen corresponding path program 5 times [2024-06-27 19:25:57,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:57,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906004778] [2024-06-27 19:25:57,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:57,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:57,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:57,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:57,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:57,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906004778] [2024-06-27 19:25:57,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906004778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:57,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:57,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:25:57,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525137109] [2024-06-27 19:25:57,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:57,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:25:57,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:57,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:25:57,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:25:57,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:57,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 190 transitions, 2331 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:57,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:57,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:57,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:58,018 INFO L124 PetriNetUnfolderBase]: 1681/2858 cut-off events. [2024-06-27 19:25:58,018 INFO L125 PetriNetUnfolderBase]: For 107942/107942 co-relation queries the response was YES. [2024-06-27 19:25:58,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17889 conditions, 2858 events. 1681/2858 cut-off events. For 107942/107942 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16653 event pairs, 421 based on Foata normal form. 12/2865 useless extension candidates. Maximal degree in co-relation 17809. Up to 2282 conditions per place. [2024-06-27 19:25:58,040 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 176 selfloop transitions, 48 changer transitions 0/232 dead transitions. [2024-06-27 19:25:58,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 232 transitions, 2937 flow [2024-06-27 19:25:58,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:25:58,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:25:58,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-27 19:25:58,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:25:58,041 INFO L175 Difference]: Start difference. First operand has 166 places, 190 transitions, 2331 flow. Second operand 9 states and 225 transitions. [2024-06-27 19:25:58,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 232 transitions, 2937 flow [2024-06-27 19:25:58,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 232 transitions, 2828 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 19:25:58,188 INFO L231 Difference]: Finished difference. Result has 169 places, 191 transitions, 2356 flow [2024-06-27 19:25:58,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2222, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2356, PETRI_PLACES=169, PETRI_TRANSITIONS=191} [2024-06-27 19:25:58,189 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-27 19:25:58,189 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 191 transitions, 2356 flow [2024-06-27 19:25:58,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:58,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:58,189 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 19:25:58,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 19:25:58,190 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:58,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:58,190 INFO L85 PathProgramCache]: Analyzing trace with hash 903816141, now seen corresponding path program 1 times [2024-06-27 19:25:58,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:58,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571093175] [2024-06-27 19:25:58,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:58,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:58,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:58,276 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 19:25:58,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:58,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571093175] [2024-06-27 19:25:58,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571093175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:58,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:58,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:25:58,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414951717] [2024-06-27 19:25:58,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:58,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:25:58,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:58,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:25:58,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:25:58,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:58,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 191 transitions, 2356 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:58,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:58,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:58,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:58,769 INFO L124 PetriNetUnfolderBase]: 1808/3091 cut-off events. [2024-06-27 19:25:58,769 INFO L125 PetriNetUnfolderBase]: For 125389/125389 co-relation queries the response was YES. [2024-06-27 19:25:58,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19636 conditions, 3091 events. 1808/3091 cut-off events. For 125389/125389 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 18459 event pairs, 463 based on Foata normal form. 12/3098 useless extension candidates. Maximal degree in co-relation 19555. Up to 2183 conditions per place. [2024-06-27 19:25:58,802 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 170 selfloop transitions, 50 changer transitions 0/228 dead transitions. [2024-06-27 19:25:58,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 228 transitions, 3110 flow [2024-06-27 19:25:58,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:25:58,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:25:58,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-27 19:25:58,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376306620209059 [2024-06-27 19:25:58,804 INFO L175 Difference]: Start difference. First operand has 169 places, 191 transitions, 2356 flow. Second operand 7 states and 183 transitions. [2024-06-27 19:25:58,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 228 transitions, 3110 flow [2024-06-27 19:25:58,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 228 transitions, 2990 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 19:25:58,995 INFO L231 Difference]: Finished difference. Result has 169 places, 193 transitions, 2408 flow [2024-06-27 19:25:58,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2236, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2408, PETRI_PLACES=169, PETRI_TRANSITIONS=193} [2024-06-27 19:25:58,996 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-27 19:25:58,996 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 193 transitions, 2408 flow [2024-06-27 19:25:58,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:58,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:58,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:58,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 19:25:58,997 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 19:25:58,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:58,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1734179375, now seen corresponding path program 1 times [2024-06-27 19:25:58,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:58,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732249510] [2024-06-27 19:25:58,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:58,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:59,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:59,066 INFO 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 19:25:59,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:59,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732249510] [2024-06-27 19:25:59,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732249510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:59,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:59,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:25:59,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758588722] [2024-06-27 19:25:59,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:59,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:25:59,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:59,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:25:59,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:25:59,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:59,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 193 transitions, 2408 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 19:25:59,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:59,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:59,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:59,440 INFO L124 PetriNetUnfolderBase]: 1837/3117 cut-off events. [2024-06-27 19:25:59,440 INFO L125 PetriNetUnfolderBase]: For 125591/125591 co-relation queries the response was YES. [2024-06-27 19:25:59,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20184 conditions, 3117 events. 1837/3117 cut-off events. For 125591/125591 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 18528 event pairs, 492 based on Foata normal form. 1/3109 useless extension candidates. Maximal degree in co-relation 20102. Up to 2635 conditions per place. [2024-06-27 19:25:59,466 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 151 selfloop transitions, 68 changer transitions 0/227 dead transitions. [2024-06-27 19:25:59,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 227 transitions, 3358 flow [2024-06-27 19:25:59,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:25:59,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:25:59,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-27 19:25:59,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-27 19:25:59,467 INFO L175 Difference]: Start difference. First operand has 169 places, 193 transitions, 2408 flow. Second operand 6 states and 159 transitions. [2024-06-27 19:25:59,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 227 transitions, 3358 flow [2024-06-27 19:25:59,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 227 transitions, 3275 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 19:25:59,699 INFO L231 Difference]: Finished difference. Result has 175 places, 205 transitions, 2779 flow [2024-06-27 19:25:59,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2325, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2779, PETRI_PLACES=175, PETRI_TRANSITIONS=205} [2024-06-27 19:25:59,699 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-27 19:25:59,699 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 205 transitions, 2779 flow [2024-06-27 19:25:59,700 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 19:25:59,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:59,700 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 19:25:59,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 19:25:59,700 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 19:25:59,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:59,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1739893295, now seen corresponding path program 2 times [2024-06-27 19:25:59,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:59,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059350472] [2024-06-27 19:25:59,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:59,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:59,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:59,785 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 19:25:59,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:59,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059350472] [2024-06-27 19:25:59,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059350472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:59,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:59,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:25:59,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082506287] [2024-06-27 19:25:59,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:59,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:25:59,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:59,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:25:59,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:25:59,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:25:59,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 205 transitions, 2779 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 19:25:59,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:59,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:25:59,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:00,191 INFO L124 PetriNetUnfolderBase]: 1870/3176 cut-off events. [2024-06-27 19:26:00,191 INFO L125 PetriNetUnfolderBase]: For 131225/131225 co-relation queries the response was YES. [2024-06-27 19:26:00,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21142 conditions, 3176 events. 1870/3176 cut-off events. For 131225/131225 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 18958 event pairs, 473 based on Foata normal form. 1/3173 useless extension candidates. Maximal degree in co-relation 21055. Up to 2840 conditions per place. [2024-06-27 19:26:00,218 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 195 selfloop transitions, 39 changer transitions 0/242 dead transitions. [2024-06-27 19:26:00,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 242 transitions, 3707 flow [2024-06-27 19:26:00,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:00,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:00,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:26:00,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-27 19:26:00,219 INFO L175 Difference]: Start difference. First operand has 175 places, 205 transitions, 2779 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:26:00,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 242 transitions, 3707 flow [2024-06-27 19:26:00,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 242 transitions, 3592 flow, removed 35 selfloop flow, removed 1 redundant places. [2024-06-27 19:26:00,423 INFO L231 Difference]: Finished difference. Result has 182 places, 222 transitions, 3085 flow [2024-06-27 19:26:00,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2681, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3085, PETRI_PLACES=182, PETRI_TRANSITIONS=222} [2024-06-27 19:26:00,423 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-27 19:26:00,423 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 222 transitions, 3085 flow [2024-06-27 19:26:00,424 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 19:26:00,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:00,424 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 19:26:00,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 19:26:00,424 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:00,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:00,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1246037629, now seen corresponding path program 6 times [2024-06-27 19:26:00,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:00,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643226438] [2024-06-27 19:26:00,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:00,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:00,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:00,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:00,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:00,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643226438] [2024-06-27 19:26:00,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643226438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:00,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:00,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:00,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886619255] [2024-06-27 19:26:00,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:00,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:00,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:00,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:00,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:00,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:00,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 222 transitions, 3085 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:00,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:00,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:00,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:01,065 INFO L124 PetriNetUnfolderBase]: 1928/3277 cut-off events. [2024-06-27 19:26:01,065 INFO L125 PetriNetUnfolderBase]: For 150766/150772 co-relation queries the response was YES. [2024-06-27 19:26:01,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21725 conditions, 3277 events. 1928/3277 cut-off events. For 150766/150772 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 19857 event pairs, 522 based on Foata normal form. 20/3286 useless extension candidates. Maximal degree in co-relation 21635. Up to 2766 conditions per place. [2024-06-27 19:26:01,101 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 198 selfloop transitions, 44 changer transitions 0/250 dead transitions. [2024-06-27 19:26:01,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 250 transitions, 3687 flow [2024-06-27 19:26:01,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:01,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:01,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 19:26:01,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:26:01,102 INFO L175 Difference]: Start difference. First operand has 182 places, 222 transitions, 3085 flow. Second operand 7 states and 175 transitions. [2024-06-27 19:26:01,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 250 transitions, 3687 flow [2024-06-27 19:26:01,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 250 transitions, 3590 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-27 19:26:01,355 INFO L231 Difference]: Finished difference. Result has 187 places, 223 transitions, 3119 flow [2024-06-27 19:26:01,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2988, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3119, PETRI_PLACES=187, PETRI_TRANSITIONS=223} [2024-06-27 19:26:01,356 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-27 19:26:01,356 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 223 transitions, 3119 flow [2024-06-27 19:26:01,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:01,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:01,356 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 19:26:01,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 19:26:01,357 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:01,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:01,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1257406367, now seen corresponding path program 7 times [2024-06-27 19:26:01,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:01,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926181668] [2024-06-27 19:26:01,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:01,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:01,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:01,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:01,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926181668] [2024-06-27 19:26:01,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926181668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:01,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:01,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:26:01,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400293627] [2024-06-27 19:26:01,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:01,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:26:01,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:01,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:26:01,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:26:01,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:01,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 223 transitions, 3119 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:01,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:01,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:01,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:02,054 INFO L124 PetriNetUnfolderBase]: 1900/3218 cut-off events. [2024-06-27 19:26:02,055 INFO L125 PetriNetUnfolderBase]: For 145049/145049 co-relation queries the response was YES. [2024-06-27 19:26:02,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21068 conditions, 3218 events. 1900/3218 cut-off events. For 145049/145049 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 19356 event pairs, 510 based on Foata normal form. 16/3220 useless extension candidates. Maximal degree in co-relation 20977. Up to 2722 conditions per place. [2024-06-27 19:26:02,080 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 199 selfloop transitions, 47 changer transitions 0/254 dead transitions. [2024-06-27 19:26:02,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 254 transitions, 3705 flow [2024-06-27 19:26:02,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:26:02,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:26:02,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 19:26:02,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-27 19:26:02,085 INFO L175 Difference]: Start difference. First operand has 187 places, 223 transitions, 3119 flow. Second operand 8 states and 197 transitions. [2024-06-27 19:26:02,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 254 transitions, 3705 flow [2024-06-27 19:26:02,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 254 transitions, 3578 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 19:26:02,302 INFO L231 Difference]: Finished difference. Result has 190 places, 223 transitions, 3093 flow [2024-06-27 19:26:02,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2992, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3093, PETRI_PLACES=190, PETRI_TRANSITIONS=223} [2024-06-27 19:26:02,303 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 148 predicate places. [2024-06-27 19:26:02,303 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 223 transitions, 3093 flow [2024-06-27 19:26:02,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:02,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:02,304 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 19:26:02,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 19:26:02,304 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:02,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:02,304 INFO L85 PathProgramCache]: Analyzing trace with hash -899415367, now seen corresponding path program 8 times [2024-06-27 19:26:02,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:02,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758070453] [2024-06-27 19:26:02,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:02,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:02,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:02,434 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 19:26:02,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:02,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758070453] [2024-06-27 19:26:02,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758070453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:02,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:02,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:26:02,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276555274] [2024-06-27 19:26:02,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:02,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:26:02,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:02,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:26:02,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:26:02,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:02,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 223 transitions, 3093 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:02,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:02,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:02,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:02,984 INFO L124 PetriNetUnfolderBase]: 1916/3250 cut-off events. [2024-06-27 19:26:02,984 INFO L125 PetriNetUnfolderBase]: For 142247/142247 co-relation queries the response was YES. [2024-06-27 19:26:03,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20886 conditions, 3250 events. 1916/3250 cut-off events. For 142247/142247 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 19583 event pairs, 503 based on Foata normal form. 12/3248 useless extension candidates. Maximal degree in co-relation 20794. Up to 2667 conditions per place. [2024-06-27 19:26:03,010 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 204 selfloop transitions, 50 changer transitions 0/262 dead transitions. [2024-06-27 19:26:03,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 262 transitions, 3757 flow [2024-06-27 19:26:03,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:26:03,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:26:03,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-27 19:26:03,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5989159891598916 [2024-06-27 19:26:03,012 INFO L175 Difference]: Start difference. First operand has 190 places, 223 transitions, 3093 flow. Second operand 9 states and 221 transitions. [2024-06-27 19:26:03,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 262 transitions, 3757 flow [2024-06-27 19:26:03,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 262 transitions, 3662 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 19:26:03,230 INFO L231 Difference]: Finished difference. Result has 194 places, 224 transitions, 3142 flow [2024-06-27 19:26:03,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2998, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3142, PETRI_PLACES=194, PETRI_TRANSITIONS=224} [2024-06-27 19:26:03,230 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-27 19:26:03,231 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 224 transitions, 3142 flow [2024-06-27 19:26:03,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:03,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:03,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:03,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 19:26:03,231 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:03,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:03,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1025244427, now seen corresponding path program 2 times [2024-06-27 19:26:03,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:03,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200795578] [2024-06-27 19:26:03,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:03,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:03,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:03,308 INFO 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 19:26:03,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:03,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200795578] [2024-06-27 19:26:03,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200795578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:03,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:03,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:03,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475206026] [2024-06-27 19:26:03,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:03,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:03,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:03,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:03,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:03,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:03,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 224 transitions, 3142 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:03,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:03,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:03,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:03,754 INFO L124 PetriNetUnfolderBase]: 1957/3346 cut-off events. [2024-06-27 19:26:03,755 INFO L125 PetriNetUnfolderBase]: For 150839/150845 co-relation queries the response was YES. [2024-06-27 19:26:03,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21439 conditions, 3346 events. 1957/3346 cut-off events. For 150839/150845 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20470 event pairs, 514 based on Foata normal form. 16/3351 useless extension candidates. Maximal degree in co-relation 21346. Up to 2738 conditions per place. [2024-06-27 19:26:03,782 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 201 selfloop transitions, 46 changer transitions 0/255 dead transitions. [2024-06-27 19:26:03,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 255 transitions, 3772 flow [2024-06-27 19:26:03,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:03,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:03,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 19:26:03,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-27 19:26:03,783 INFO L175 Difference]: Start difference. First operand has 194 places, 224 transitions, 3142 flow. Second operand 7 states and 178 transitions. [2024-06-27 19:26:03,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 255 transitions, 3772 flow [2024-06-27 19:26:04,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 255 transitions, 3642 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 19:26:04,088 INFO L231 Difference]: Finished difference. Result has 194 places, 225 transitions, 3150 flow [2024-06-27 19:26:04,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3012, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3150, PETRI_PLACES=194, PETRI_TRANSITIONS=225} [2024-06-27 19:26:04,089 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-27 19:26:04,089 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 225 transitions, 3150 flow [2024-06-27 19:26:04,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:04,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:04,089 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 19:26:04,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 19:26:04,089 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:26:04,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:04,090 INFO L85 PathProgramCache]: Analyzing trace with hash -584919781, now seen corresponding path program 3 times [2024-06-27 19:26:04,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:04,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71409521] [2024-06-27 19:26:04,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:04,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:04,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:04,175 INFO 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 19:26:04,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:04,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71409521] [2024-06-27 19:26:04,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71409521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:04,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:04,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:04,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545286192] [2024-06-27 19:26:04,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:04,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:04,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:04,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:04,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:04,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:04,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 225 transitions, 3150 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:04,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:04,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:04,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:04,657 INFO L124 PetriNetUnfolderBase]: 1937/3314 cut-off events. [2024-06-27 19:26:04,658 INFO L125 PetriNetUnfolderBase]: For 144062/144068 co-relation queries the response was YES. [2024-06-27 19:26:04,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20692 conditions, 3314 events. 1937/3314 cut-off events. For 144062/144068 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 20318 event pairs, 459 based on Foata normal form. 16/3319 useless extension candidates. Maximal degree in co-relation 20598. Up to 2141 conditions per place. [2024-06-27 19:26:04,684 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 192 selfloop transitions, 55 changer transitions 0/255 dead transitions. [2024-06-27 19:26:04,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 255 transitions, 3672 flow [2024-06-27 19:26:04,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:04,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:04,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 19:26:04,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-27 19:26:04,685 INFO L175 Difference]: Start difference. First operand has 194 places, 225 transitions, 3150 flow. Second operand 7 states and 177 transitions. [2024-06-27 19:26:04,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 255 transitions, 3672 flow [2024-06-27 19:26:04,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 255 transitions, 3542 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 19:26:04,983 INFO L231 Difference]: Finished difference. Result has 194 places, 224 transitions, 3062 flow [2024-06-27 19:26:04,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2948, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3062, PETRI_PLACES=194, PETRI_TRANSITIONS=224} [2024-06-27 19:26:04,984 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-27 19:26:04,984 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 224 transitions, 3062 flow [2024-06-27 19:26:04,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:04,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:04,984 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 19:26:04,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 19:26:04,984 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 19:26:04,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:04,984 INFO L85 PathProgramCache]: Analyzing trace with hash 548871599, now seen corresponding path program 3 times [2024-06-27 19:26:04,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:04,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163473482] [2024-06-27 19:26:04,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:04,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:05,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:05,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:05,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163473482] [2024-06-27 19:26:05,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163473482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:05,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:05,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:05,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652698717] [2024-06-27 19:26:05,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:05,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:05,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:05,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:05,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:05,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:05,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 224 transitions, 3062 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 19:26:05,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:05,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:05,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:05,532 INFO L124 PetriNetUnfolderBase]: 1942/3304 cut-off events. [2024-06-27 19:26:05,532 INFO L125 PetriNetUnfolderBase]: For 131451/131451 co-relation queries the response was YES. [2024-06-27 19:26:05,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20656 conditions, 3304 events. 1942/3304 cut-off events. For 131451/131451 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 20041 event pairs, 509 based on Foata normal form. 1/3297 useless extension candidates. Maximal degree in co-relation 20562. Up to 2793 conditions per place. [2024-06-27 19:26:05,561 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 164 selfloop transitions, 74 changer transitions 0/246 dead transitions. [2024-06-27 19:26:05,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 246 transitions, 3927 flow [2024-06-27 19:26:05,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:26:05,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:26:05,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 19:26:05,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-27 19:26:05,562 INFO L175 Difference]: Start difference. First operand has 194 places, 224 transitions, 3062 flow. Second operand 6 states and 153 transitions. [2024-06-27 19:26:05,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 246 transitions, 3927 flow [2024-06-27 19:26:05,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 246 transitions, 3751 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 19:26:05,802 INFO L231 Difference]: Finished difference. Result has 194 places, 227 transitions, 3101 flow [2024-06-27 19:26:05,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2886, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3101, PETRI_PLACES=194, PETRI_TRANSITIONS=227} [2024-06-27 19:26:05,803 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-27 19:26:05,803 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 227 transitions, 3101 flow [2024-06-27 19:26:05,803 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 19:26:05,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:05,803 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 19:26:05,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 19:26:05,803 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 19:26:05,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:05,803 INFO L85 PathProgramCache]: Analyzing trace with hash 118420861, now seen corresponding path program 4 times [2024-06-27 19:26:05,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:05,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488019169] [2024-06-27 19:26:05,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:05,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:05,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:05,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:05,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:05,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488019169] [2024-06-27 19:26:05,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488019169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:05,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:05,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:05,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439075080] [2024-06-27 19:26:05,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:05,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:05,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:05,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:05,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:05,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:05,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 227 transitions, 3101 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 19:26:05,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:05,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:05,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:06,384 INFO L124 PetriNetUnfolderBase]: 1934/3292 cut-off events. [2024-06-27 19:26:06,384 INFO L125 PetriNetUnfolderBase]: For 132811/132811 co-relation queries the response was YES. [2024-06-27 19:26:06,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20194 conditions, 3292 events. 1934/3292 cut-off events. For 132811/132811 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 19963 event pairs, 508 based on Foata normal form. 2/3286 useless extension candidates. Maximal degree in co-relation 20100. Up to 2788 conditions per place. [2024-06-27 19:26:06,411 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 164 selfloop transitions, 70 changer transitions 0/242 dead transitions. [2024-06-27 19:26:06,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 242 transitions, 3797 flow [2024-06-27 19:26:06,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:26:06,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:26:06,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 19:26:06,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:26:06,412 INFO L175 Difference]: Start difference. First operand has 194 places, 227 transitions, 3101 flow. Second operand 6 states and 150 transitions. [2024-06-27 19:26:06,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 242 transitions, 3797 flow [2024-06-27 19:26:06,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 242 transitions, 3603 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-27 19:26:06,667 INFO L231 Difference]: Finished difference. Result has 197 places, 227 transitions, 3055 flow [2024-06-27 19:26:06,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2907, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3055, PETRI_PLACES=197, PETRI_TRANSITIONS=227} [2024-06-27 19:26:06,668 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-27 19:26:06,668 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 227 transitions, 3055 flow [2024-06-27 19:26:06,668 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 19:26:06,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:06,668 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 19:26:06,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:26:06,669 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 19:26:06,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:06,669 INFO L85 PathProgramCache]: Analyzing trace with hash -793475779, now seen corresponding path program 5 times [2024-06-27 19:26:06,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:06,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508192457] [2024-06-27 19:26:06,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:06,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:06,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:06,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:06,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:06,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508192457] [2024-06-27 19:26:06,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508192457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:06,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:06,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:06,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341135260] [2024-06-27 19:26:06,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:06,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:06,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:06,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:06,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:06,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:06,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 227 transitions, 3055 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 19:26:06,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:06,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:06,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:07,173 INFO L124 PetriNetUnfolderBase]: 1928/3286 cut-off events. [2024-06-27 19:26:07,173 INFO L125 PetriNetUnfolderBase]: For 134049/134049 co-relation queries the response was YES. [2024-06-27 19:26:07,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19957 conditions, 3286 events. 1928/3286 cut-off events. For 134049/134049 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19959 event pairs, 500 based on Foata normal form. 2/3282 useless extension candidates. Maximal degree in co-relation 19863. Up to 2767 conditions per place. [2024-06-27 19:26:07,200 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 155 selfloop transitions, 86 changer transitions 0/249 dead transitions. [2024-06-27 19:26:07,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 249 transitions, 3806 flow [2024-06-27 19:26:07,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:26:07,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:26:07,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-27 19:26:07,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6504065040650406 [2024-06-27 19:26:07,201 INFO L175 Difference]: Start difference. First operand has 197 places, 227 transitions, 3055 flow. Second operand 6 states and 160 transitions. [2024-06-27 19:26:07,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 249 transitions, 3806 flow [2024-06-27 19:26:07,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 249 transitions, 3612 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 19:26:07,462 INFO L231 Difference]: Finished difference. Result has 197 places, 227 transitions, 3048 flow [2024-06-27 19:26:07,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2863, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3048, PETRI_PLACES=197, PETRI_TRANSITIONS=227} [2024-06-27 19:26:07,462 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-27 19:26:07,462 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 227 transitions, 3048 flow [2024-06-27 19:26:07,462 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 19:26:07,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:07,462 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 19:26:07,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:26:07,463 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 19:26:07,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:07,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1912306031, now seen corresponding path program 6 times [2024-06-27 19:26:07,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:07,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999773296] [2024-06-27 19:26:07,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:07,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:07,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:07,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:07,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:07,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999773296] [2024-06-27 19:26:07,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999773296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:07,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:07,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:07,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673317931] [2024-06-27 19:26:07,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:07,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:07,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:07,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:07,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:07,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:07,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 227 transitions, 3048 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 19:26:07,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:07,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:07,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:08,156 INFO L124 PetriNetUnfolderBase]: 1920/3283 cut-off events. [2024-06-27 19:26:08,156 INFO L125 PetriNetUnfolderBase]: For 135025/135025 co-relation queries the response was YES. [2024-06-27 19:26:08,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19834 conditions, 3283 events. 1920/3283 cut-off events. For 135025/135025 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 19891 event pairs, 479 based on Foata normal form. 2/3281 useless extension candidates. Maximal degree in co-relation 19739. Up to 2762 conditions per place. [2024-06-27 19:26:08,188 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 152 selfloop transitions, 96 changer transitions 0/256 dead transitions. [2024-06-27 19:26:08,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 256 transitions, 3833 flow [2024-06-27 19:26:08,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:08,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:08,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-27 19:26:08,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.662020905923345 [2024-06-27 19:26:08,190 INFO L175 Difference]: Start difference. First operand has 197 places, 227 transitions, 3048 flow. Second operand 7 states and 190 transitions. [2024-06-27 19:26:08,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 256 transitions, 3833 flow [2024-06-27 19:26:08,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 256 transitions, 3574 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 19:26:08,502 INFO L231 Difference]: Finished difference. Result has 198 places, 227 transitions, 3008 flow [2024-06-27 19:26:08,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2789, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3008, PETRI_PLACES=198, PETRI_TRANSITIONS=227} [2024-06-27 19:26:08,502 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2024-06-27 19:26:08,502 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 227 transitions, 3008 flow [2024-06-27 19:26:08,503 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 19:26:08,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:08,503 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 19:26:08,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 19:26:08,503 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 19:26:08,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:08,504 INFO L85 PathProgramCache]: Analyzing trace with hash 114710874, now seen corresponding path program 1 times [2024-06-27 19:26:08,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:08,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040953267] [2024-06-27 19:26:08,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:08,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:08,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:08,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:08,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:08,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040953267] [2024-06-27 19:26:08,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040953267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:08,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:08,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:08,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699668355] [2024-06-27 19:26:08,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:08,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:08,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:08,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:08,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:08,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:08,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 227 transitions, 3008 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:08,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:08,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:08,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:09,034 INFO L124 PetriNetUnfolderBase]: 1948/3328 cut-off events. [2024-06-27 19:26:09,034 INFO L125 PetriNetUnfolderBase]: For 144297/144303 co-relation queries the response was YES. [2024-06-27 19:26:09,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20323 conditions, 3328 events. 1948/3328 cut-off events. For 144297/144303 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20328 event pairs, 513 based on Foata normal form. 6/3327 useless extension candidates. Maximal degree in co-relation 20227. Up to 2808 conditions per place. [2024-06-27 19:26:09,064 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 172 selfloop transitions, 71 changer transitions 0/251 dead transitions. [2024-06-27 19:26:09,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 251 transitions, 3879 flow [2024-06-27 19:26:09,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:26:09,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:26:09,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 19:26:09,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:26:09,065 INFO L175 Difference]: Start difference. First operand has 198 places, 227 transitions, 3008 flow. Second operand 6 states and 150 transitions. [2024-06-27 19:26:09,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 251 transitions, 3879 flow [2024-06-27 19:26:09,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 251 transitions, 3664 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 19:26:09,355 INFO L231 Difference]: Finished difference. Result has 199 places, 236 transitions, 3106 flow [2024-06-27 19:26:09,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2797, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3106, PETRI_PLACES=199, PETRI_TRANSITIONS=236} [2024-06-27 19:26:09,356 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2024-06-27 19:26:09,356 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 236 transitions, 3106 flow [2024-06-27 19:26:09,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:09,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:09,356 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 19:26:09,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 19:26:09,357 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 19:26:09,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:09,357 INFO L85 PathProgramCache]: Analyzing trace with hash 708439832, now seen corresponding path program 2 times [2024-06-27 19:26:09,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:09,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234345287] [2024-06-27 19:26:09,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:09,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:09,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:09,449 INFO 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 19:26:09,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:09,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234345287] [2024-06-27 19:26:09,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234345287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:09,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:09,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:09,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230167467] [2024-06-27 19:26:09,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:09,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:09,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:09,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:09,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:09,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:09,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 236 transitions, 3106 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 19:26:09,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:09,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:09,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:09,892 INFO L124 PetriNetUnfolderBase]: 1958/3338 cut-off events. [2024-06-27 19:26:09,892 INFO L125 PetriNetUnfolderBase]: For 143504/143504 co-relation queries the response was YES. [2024-06-27 19:26:09,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20443 conditions, 3338 events. 1958/3338 cut-off events. For 143504/143504 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 20416 event pairs, 506 based on Foata normal form. 2/3332 useless extension candidates. Maximal degree in co-relation 20345. Up to 2818 conditions per place. [2024-06-27 19:26:09,927 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 165 selfloop transitions, 86 changer transitions 0/259 dead transitions. [2024-06-27 19:26:09,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 259 transitions, 4027 flow [2024-06-27 19:26:09,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:26:09,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:26:09,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-27 19:26:09,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745257452574526 [2024-06-27 19:26:09,928 INFO L175 Difference]: Start difference. First operand has 199 places, 236 transitions, 3106 flow. Second operand 9 states and 212 transitions. [2024-06-27 19:26:09,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 259 transitions, 4027 flow [2024-06-27 19:26:10,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 259 transitions, 3888 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-27 19:26:10,170 INFO L231 Difference]: Finished difference. Result has 206 places, 240 transitions, 3215 flow [2024-06-27 19:26:10,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2972, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3215, PETRI_PLACES=206, PETRI_TRANSITIONS=240} [2024-06-27 19:26:10,171 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-27 19:26:10,171 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 240 transitions, 3215 flow [2024-06-27 19:26:10,172 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 19:26:10,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:10,172 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 19:26:10,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 19:26:10,172 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 19:26:10,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:10,173 INFO L85 PathProgramCache]: Analyzing trace with hash -437109334, now seen corresponding path program 3 times [2024-06-27 19:26:10,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:10,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273910541] [2024-06-27 19:26:10,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:10,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:10,267 INFO 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 19:26:10,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:10,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273910541] [2024-06-27 19:26:10,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273910541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:10,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:10,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:10,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345512628] [2024-06-27 19:26:10,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:10,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:10,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:10,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:10,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:10,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:10,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 240 transitions, 3215 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 19:26:10,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:10,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:10,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:10,727 INFO L124 PetriNetUnfolderBase]: 1954/3334 cut-off events. [2024-06-27 19:26:10,727 INFO L125 PetriNetUnfolderBase]: For 146531/146531 co-relation queries the response was YES. [2024-06-27 19:26:10,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20344 conditions, 3334 events. 1954/3334 cut-off events. For 146531/146531 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20358 event pairs, 507 based on Foata normal form. 2/3328 useless extension candidates. Maximal degree in co-relation 20245. Up to 2816 conditions per place. [2024-06-27 19:26:10,756 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 168 selfloop transitions, 80 changer transitions 0/256 dead transitions. [2024-06-27 19:26:10,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 256 transitions, 3957 flow [2024-06-27 19:26:10,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:10,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:10,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 19:26:10,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-27 19:26:10,758 INFO L175 Difference]: Start difference. First operand has 206 places, 240 transitions, 3215 flow. Second operand 7 states and 171 transitions. [2024-06-27 19:26:10,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 256 transitions, 3957 flow [2024-06-27 19:26:11,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 256 transitions, 3671 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-27 19:26:11,039 INFO L231 Difference]: Finished difference. Result has 206 places, 240 transitions, 3097 flow [2024-06-27 19:26:11,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2929, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3097, PETRI_PLACES=206, PETRI_TRANSITIONS=240} [2024-06-27 19:26:11,040 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-27 19:26:11,040 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 240 transitions, 3097 flow [2024-06-27 19:26:11,040 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 19:26:11,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:11,040 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 19:26:11,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 19:26:11,041 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 19:26:11,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:11,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1905630708, now seen corresponding path program 4 times [2024-06-27 19:26:11,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:11,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916281755] [2024-06-27 19:26:11,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:11,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:11,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:11,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:11,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:11,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916281755] [2024-06-27 19:26:11,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916281755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:11,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:11,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:11,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4826535] [2024-06-27 19:26:11,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:11,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:11,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:11,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:11,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:11,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:11,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 240 transitions, 3097 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:11,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:11,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:11,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:11,601 INFO L124 PetriNetUnfolderBase]: 1971/3367 cut-off events. [2024-06-27 19:26:11,601 INFO L125 PetriNetUnfolderBase]: For 151789/151789 co-relation queries the response was YES. [2024-06-27 19:26:11,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20409 conditions, 3367 events. 1971/3367 cut-off events. For 151789/151789 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 20580 event pairs, 496 based on Foata normal form. 3/3364 useless extension candidates. Maximal degree in co-relation 20311. Up to 2829 conditions per place. [2024-06-27 19:26:11,629 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 163 selfloop transitions, 93 changer transitions 0/264 dead transitions. [2024-06-27 19:26:11,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 264 transitions, 3845 flow [2024-06-27 19:26:11,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:26:11,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:26:11,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-27 19:26:11,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-27 19:26:11,630 INFO L175 Difference]: Start difference. First operand has 206 places, 240 transitions, 3097 flow. Second operand 6 states and 156 transitions. [2024-06-27 19:26:11,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 264 transitions, 3845 flow [2024-06-27 19:26:11,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 264 transitions, 3679 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 19:26:11,913 INFO L231 Difference]: Finished difference. Result has 206 places, 247 transitions, 3221 flow [2024-06-27 19:26:11,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2937, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3221, PETRI_PLACES=206, PETRI_TRANSITIONS=247} [2024-06-27 19:26:11,913 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-27 19:26:11,913 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 247 transitions, 3221 flow [2024-06-27 19:26:11,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:11,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:11,914 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 19:26:11,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 19:26:11,914 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 19:26:11,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:11,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1905625128, now seen corresponding path program 5 times [2024-06-27 19:26:11,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:11,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214741338] [2024-06-27 19:26:11,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:11,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:11,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:11,985 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 19:26:11,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:11,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214741338] [2024-06-27 19:26:11,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214741338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:11,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:11,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:11,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944820464] [2024-06-27 19:26:11,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:11,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:11,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:11,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:11,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:12,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:12,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 247 transitions, 3221 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:12,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:12,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:12,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:12,477 INFO L124 PetriNetUnfolderBase]: 1962/3355 cut-off events. [2024-06-27 19:26:12,477 INFO L125 PetriNetUnfolderBase]: For 152428/152428 co-relation queries the response was YES. [2024-06-27 19:26:12,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20290 conditions, 3355 events. 1962/3355 cut-off events. For 152428/152428 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20519 event pairs, 493 based on Foata normal form. 3/3352 useless extension candidates. Maximal degree in co-relation 20191. Up to 2821 conditions per place. [2024-06-27 19:26:12,502 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 156 selfloop transitions, 98 changer transitions 0/262 dead transitions. [2024-06-27 19:26:12,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 262 transitions, 3873 flow [2024-06-27 19:26:12,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:12,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:12,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 19:26:12,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-27 19:26:12,503 INFO L175 Difference]: Start difference. First operand has 206 places, 247 transitions, 3221 flow. Second operand 7 states and 174 transitions. [2024-06-27 19:26:12,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 262 transitions, 3873 flow [2024-06-27 19:26:12,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 262 transitions, 3624 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 19:26:12,793 INFO L231 Difference]: Finished difference. Result has 208 places, 247 transitions, 3181 flow [2024-06-27 19:26:12,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2972, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3181, PETRI_PLACES=208, PETRI_TRANSITIONS=247} [2024-06-27 19:26:12,794 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-27 19:26:12,794 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 247 transitions, 3181 flow [2024-06-27 19:26:12,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:12,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:12,794 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 19:26:12,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 19:26:12,794 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 19:26:12,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:12,795 INFO L85 PathProgramCache]: Analyzing trace with hash -410012270, now seen corresponding path program 1 times [2024-06-27 19:26:12,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:12,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972604333] [2024-06-27 19:26:12,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:12,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:12,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:12,868 INFO 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 19:26:12,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:12,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972604333] [2024-06-27 19:26:12,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972604333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:12,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:12,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:12,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411917020] [2024-06-27 19:26:12,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:12,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:12,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:12,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:12,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:12,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:12,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 247 transitions, 3181 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:12,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:12,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:12,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:13,280 INFO L124 PetriNetUnfolderBase]: 1999/3418 cut-off events. [2024-06-27 19:26:13,281 INFO L125 PetriNetUnfolderBase]: For 161196/161196 co-relation queries the response was YES. [2024-06-27 19:26:13,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20884 conditions, 3418 events. 1999/3418 cut-off events. For 161196/161196 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 20884 event pairs, 503 based on Foata normal form. 1/3408 useless extension candidates. Maximal degree in co-relation 20785. Up to 2861 conditions per place. [2024-06-27 19:26:13,311 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 164 selfloop transitions, 107 changer transitions 0/279 dead transitions. [2024-06-27 19:26:13,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 279 transitions, 4164 flow [2024-06-27 19:26:13,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:26:13,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:26:13,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-27 19:26:13,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382113821138211 [2024-06-27 19:26:13,312 INFO L175 Difference]: Start difference. First operand has 208 places, 247 transitions, 3181 flow. Second operand 6 states and 157 transitions. [2024-06-27 19:26:13,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 279 transitions, 4164 flow [2024-06-27 19:26:13,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 279 transitions, 3934 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 19:26:13,682 INFO L231 Difference]: Finished difference. Result has 208 places, 258 transitions, 3340 flow [2024-06-27 19:26:13,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2960, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3340, PETRI_PLACES=208, PETRI_TRANSITIONS=258} [2024-06-27 19:26:13,682 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-27 19:26:13,682 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 258 transitions, 3340 flow [2024-06-27 19:26:13,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:13,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:13,683 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 19:26:13,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 19:26:13,683 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 19:26:13,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:13,684 INFO L85 PathProgramCache]: Analyzing trace with hash -2075013290, now seen corresponding path program 2 times [2024-06-27 19:26:13,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:13,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485517962] [2024-06-27 19:26:13,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:13,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:13,765 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 19:26:13,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:13,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485517962] [2024-06-27 19:26:13,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485517962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:13,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:13,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:13,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863587563] [2024-06-27 19:26:13,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:13,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:13,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:13,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:13,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:13,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:13,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 258 transitions, 3340 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 19:26:13,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:13,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:13,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:14,214 INFO L124 PetriNetUnfolderBase]: 2004/3427 cut-off events. [2024-06-27 19:26:14,215 INFO L125 PetriNetUnfolderBase]: For 166494/166494 co-relation queries the response was YES. [2024-06-27 19:26:14,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21065 conditions, 3427 events. 2004/3427 cut-off events. For 166494/166494 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 20987 event pairs, 503 based on Foata normal form. 1/3417 useless extension candidates. Maximal degree in co-relation 20965. Up to 2865 conditions per place. [2024-06-27 19:26:14,245 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 165 selfloop transitions, 109 changer transitions 0/282 dead transitions. [2024-06-27 19:26:14,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 282 transitions, 4095 flow [2024-06-27 19:26:14,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:14,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:14,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 19:26:14,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:26:14,246 INFO L175 Difference]: Start difference. First operand has 208 places, 258 transitions, 3340 flow. Second operand 7 states and 175 transitions. [2024-06-27 19:26:14,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 282 transitions, 4095 flow [2024-06-27 19:26:14,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 282 transitions, 3938 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-27 19:26:14,677 INFO L231 Difference]: Finished difference. Result has 213 places, 261 transitions, 3450 flow [2024-06-27 19:26:14,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3186, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3450, PETRI_PLACES=213, PETRI_TRANSITIONS=261} [2024-06-27 19:26:14,678 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-27 19:26:14,678 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 261 transitions, 3450 flow [2024-06-27 19:26:14,678 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 19:26:14,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:14,679 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 19:26:14,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 19:26:14,679 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 19:26:14,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:14,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1888056718, now seen corresponding path program 3 times [2024-06-27 19:26:14,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:14,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548708112] [2024-06-27 19:26:14,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:14,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:14,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:14,755 INFO 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 19:26:14,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:14,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548708112] [2024-06-27 19:26:14,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548708112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:14,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:14,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:14,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500658818] [2024-06-27 19:26:14,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:14,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:14,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:14,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:14,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:14,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:14,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 261 transitions, 3450 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:14,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:14,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:14,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:15,215 INFO L124 PetriNetUnfolderBase]: 2001/3427 cut-off events. [2024-06-27 19:26:15,215 INFO L125 PetriNetUnfolderBase]: For 170064/170064 co-relation queries the response was YES. [2024-06-27 19:26:15,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21110 conditions, 3427 events. 2001/3427 cut-off events. For 170064/170064 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 21038 event pairs, 475 based on Foata normal form. 1/3424 useless extension candidates. Maximal degree in co-relation 21009. Up to 3057 conditions per place. [2024-06-27 19:26:15,247 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 232 selfloop transitions, 39 changer transitions 0/279 dead transitions. [2024-06-27 19:26:15,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 279 transitions, 4049 flow [2024-06-27 19:26:15,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:15,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:15,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 19:26:15,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-27 19:26:15,248 INFO L175 Difference]: Start difference. First operand has 213 places, 261 transitions, 3450 flow. Second operand 7 states and 170 transitions. [2024-06-27 19:26:15,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 279 transitions, 4049 flow [2024-06-27 19:26:15,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 279 transitions, 3805 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 19:26:15,650 INFO L231 Difference]: Finished difference. Result has 215 places, 261 transitions, 3296 flow [2024-06-27 19:26:15,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3208, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3296, PETRI_PLACES=215, PETRI_TRANSITIONS=261} [2024-06-27 19:26:15,651 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-27 19:26:15,651 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 261 transitions, 3296 flow [2024-06-27 19:26:15,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:15,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:15,651 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 19:26:15,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 19:26:15,651 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 19:26:15,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:15,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1049553066, now seen corresponding path program 4 times [2024-06-27 19:26:15,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:15,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254623966] [2024-06-27 19:26:15,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:15,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:15,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:15,726 INFO 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 19:26:15,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:15,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254623966] [2024-06-27 19:26:15,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254623966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:15,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:15,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:15,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62684448] [2024-06-27 19:26:15,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:15,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:15,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:15,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:15,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:15,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:15,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 261 transitions, 3296 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 19:26:15,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:15,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:15,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:16,192 INFO L124 PetriNetUnfolderBase]: 2006/3420 cut-off events. [2024-06-27 19:26:16,192 INFO L125 PetriNetUnfolderBase]: For 175620/175620 co-relation queries the response was YES. [2024-06-27 19:26:16,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20966 conditions, 3420 events. 2006/3420 cut-off events. For 175620/175620 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 20920 event pairs, 522 based on Foata normal form. 1/3413 useless extension candidates. Maximal degree in co-relation 20864. Up to 2867 conditions per place. [2024-06-27 19:26:16,223 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 174 selfloop transitions, 100 changer transitions 0/282 dead transitions. [2024-06-27 19:26:16,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 282 transitions, 4044 flow [2024-06-27 19:26:16,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:16,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:16,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 19:26:16,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-27 19:26:16,224 INFO L175 Difference]: Start difference. First operand has 215 places, 261 transitions, 3296 flow. Second operand 7 states and 170 transitions. [2024-06-27 19:26:16,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 282 transitions, 4044 flow [2024-06-27 19:26:16,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 282 transitions, 3966 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 19:26:16,562 INFO L231 Difference]: Finished difference. Result has 216 places, 264 transitions, 3466 flow [2024-06-27 19:26:16,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3218, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3466, PETRI_PLACES=216, PETRI_TRANSITIONS=264} [2024-06-27 19:26:16,562 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-27 19:26:16,563 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 264 transitions, 3466 flow [2024-06-27 19:26:16,563 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 19:26:16,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:16,563 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 19:26:16,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 19:26:16,563 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 19:26:16,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:16,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1407797414, now seen corresponding path program 5 times [2024-06-27 19:26:16,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:16,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982721116] [2024-06-27 19:26:16,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:16,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:16,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:16,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:16,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:16,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982721116] [2024-06-27 19:26:16,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982721116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:16,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:16,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:16,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456617210] [2024-06-27 19:26:16,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:16,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:16,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:16,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:16,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:16,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:16,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 264 transitions, 3466 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:16,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:16,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:16,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:17,076 INFO L124 PetriNetUnfolderBase]: 2011/3443 cut-off events. [2024-06-27 19:26:17,076 INFO L125 PetriNetUnfolderBase]: For 182939/182945 co-relation queries the response was YES. [2024-06-27 19:26:17,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21376 conditions, 3443 events. 2011/3443 cut-off events. For 182939/182945 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 21167 event pairs, 513 based on Foata normal form. 5/3441 useless extension candidates. Maximal degree in co-relation 21273. Up to 2871 conditions per place. [2024-06-27 19:26:17,112 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 178 selfloop transitions, 99 changer transitions 0/285 dead transitions. [2024-06-27 19:26:17,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 285 transitions, 4344 flow [2024-06-27 19:26:17,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:26:17,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:26:17,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 19:26:17,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-27 19:26:17,114 INFO L175 Difference]: Start difference. First operand has 216 places, 264 transitions, 3466 flow. Second operand 6 states and 152 transitions. [2024-06-27 19:26:17,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 285 transitions, 4344 flow [2024-06-27 19:26:17,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 285 transitions, 4204 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 19:26:17,402 INFO L231 Difference]: Finished difference. Result has 218 places, 267 transitions, 3574 flow [2024-06-27 19:26:17,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3328, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3574, PETRI_PLACES=218, PETRI_TRANSITIONS=267} [2024-06-27 19:26:17,402 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-27 19:26:17,402 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 267 transitions, 3574 flow [2024-06-27 19:26:17,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:17,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:17,403 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 19:26:17,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 19:26:17,403 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 19:26:17,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:17,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1427107602, now seen corresponding path program 6 times [2024-06-27 19:26:17,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:17,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267051293] [2024-06-27 19:26:17,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:17,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:17,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:17,465 INFO 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 19:26:17,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:17,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267051293] [2024-06-27 19:26:17,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267051293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:17,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:17,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:17,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363615282] [2024-06-27 19:26:17,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:17,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:17,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:17,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:17,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:17,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:17,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 267 transitions, 3574 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:17,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:17,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:17,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:17,896 INFO L124 PetriNetUnfolderBase]: 2003/3431 cut-off events. [2024-06-27 19:26:17,897 INFO L125 PetriNetUnfolderBase]: For 187651/187657 co-relation queries the response was YES. [2024-06-27 19:26:17,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21311 conditions, 3431 events. 2003/3431 cut-off events. For 187651/187657 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 21116 event pairs, 513 based on Foata normal form. 6/3430 useless extension candidates. Maximal degree in co-relation 21206. Up to 2863 conditions per place. [2024-06-27 19:26:17,928 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 182 selfloop transitions, 91 changer transitions 0/281 dead transitions. [2024-06-27 19:26:17,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 281 transitions, 4274 flow [2024-06-27 19:26:17,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:26:17,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:26:17,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 19:26:17,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-27 19:26:17,929 INFO L175 Difference]: Start difference. First operand has 218 places, 267 transitions, 3574 flow. Second operand 6 states and 149 transitions. [2024-06-27 19:26:17,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 281 transitions, 4274 flow [2024-06-27 19:26:18,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 281 transitions, 4071 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 19:26:18,404 INFO L231 Difference]: Finished difference. Result has 221 places, 267 transitions, 3561 flow [2024-06-27 19:26:18,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3371, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3561, PETRI_PLACES=221, PETRI_TRANSITIONS=267} [2024-06-27 19:26:18,405 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-27 19:26:18,405 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 267 transitions, 3561 flow [2024-06-27 19:26:18,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:18,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:18,405 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 19:26:18,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 19:26:18,406 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 19:26:18,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:18,406 INFO L85 PathProgramCache]: Analyzing trace with hash 495281992, now seen corresponding path program 7 times [2024-06-27 19:26:18,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:18,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872741108] [2024-06-27 19:26:18,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:18,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:18,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:18,491 INFO 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 19:26:18,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:18,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872741108] [2024-06-27 19:26:18,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872741108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:18,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:18,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:18,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552569074] [2024-06-27 19:26:18,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:18,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:18,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:18,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:18,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:18,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:18,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 267 transitions, 3561 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 19:26:18,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:18,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:18,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:19,026 INFO L124 PetriNetUnfolderBase]: 1997/3415 cut-off events. [2024-06-27 19:26:19,026 INFO L125 PetriNetUnfolderBase]: For 188977/188977 co-relation queries the response was YES. [2024-06-27 19:26:19,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21209 conditions, 3415 events. 1997/3415 cut-off events. For 188977/188977 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 20992 event pairs, 513 based on Foata normal form. 2/3409 useless extension candidates. Maximal degree in co-relation 21103. Up to 2858 conditions per place. [2024-06-27 19:26:19,059 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 175 selfloop transitions, 102 changer transitions 0/285 dead transitions. [2024-06-27 19:26:19,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 285 transitions, 4401 flow [2024-06-27 19:26:19,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:26:19,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:26:19,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-27 19:26:19,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-27 19:26:19,060 INFO L175 Difference]: Start difference. First operand has 221 places, 267 transitions, 3561 flow. Second operand 9 states and 211 transitions. [2024-06-27 19:26:19,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 285 transitions, 4401 flow [2024-06-27 19:26:19,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 285 transitions, 4209 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 19:26:19,456 INFO L231 Difference]: Finished difference. Result has 225 places, 267 transitions, 3580 flow [2024-06-27 19:26:19,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3369, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3580, PETRI_PLACES=225, PETRI_TRANSITIONS=267} [2024-06-27 19:26:19,457 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-27 19:26:19,457 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 267 transitions, 3580 flow [2024-06-27 19:26:19,457 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 19:26:19,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:19,457 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 19:26:19,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 19:26:19,457 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 19:26:19,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:19,458 INFO L85 PathProgramCache]: Analyzing trace with hash -665501196, now seen corresponding path program 8 times [2024-06-27 19:26:19,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:19,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241792000] [2024-06-27 19:26:19,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:19,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:19,544 INFO 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 19:26:19,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:19,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241792000] [2024-06-27 19:26:19,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241792000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:19,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:19,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:19,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142306719] [2024-06-27 19:26:19,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:19,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:19,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:19,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:19,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:19,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:19,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 267 transitions, 3580 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 19:26:19,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:19,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:19,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:20,006 INFO L124 PetriNetUnfolderBase]: 1989/3403 cut-off events. [2024-06-27 19:26:20,006 INFO L125 PetriNetUnfolderBase]: For 190387/190387 co-relation queries the response was YES. [2024-06-27 19:26:20,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21143 conditions, 3403 events. 1989/3403 cut-off events. For 190387/190387 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 20918 event pairs, 513 based on Foata normal form. 2/3397 useless extension candidates. Maximal degree in co-relation 21036. Up to 2850 conditions per place. [2024-06-27 19:26:20,039 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 176 selfloop transitions, 98 changer transitions 0/282 dead transitions. [2024-06-27 19:26:20,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 282 transitions, 4288 flow [2024-06-27 19:26:20,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:20,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:20,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 19:26:20,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-27 19:26:20,040 INFO L175 Difference]: Start difference. First operand has 225 places, 267 transitions, 3580 flow. Second operand 7 states and 170 transitions. [2024-06-27 19:26:20,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 282 transitions, 4288 flow [2024-06-27 19:26:20,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 282 transitions, 3976 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-27 19:26:20,515 INFO L231 Difference]: Finished difference. Result has 224 places, 267 transitions, 3473 flow [2024-06-27 19:26:20,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3268, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3473, PETRI_PLACES=224, PETRI_TRANSITIONS=267} [2024-06-27 19:26:20,516 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-27 19:26:20,516 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 267 transitions, 3473 flow [2024-06-27 19:26:20,516 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 19:26:20,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:20,516 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 19:26:20,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 19:26:20,517 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 19:26:20,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:20,517 INFO L85 PathProgramCache]: Analyzing trace with hash 848056116, now seen corresponding path program 9 times [2024-06-27 19:26:20,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:20,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816469995] [2024-06-27 19:26:20,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:20,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:20,591 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 19:26:20,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:20,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816469995] [2024-06-27 19:26:20,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816469995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:20,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:20,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:20,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5940480] [2024-06-27 19:26:20,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:20,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:20,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:20,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:20,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:20,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:20,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 267 transitions, 3473 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:20,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:20,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:20,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:21,129 INFO L124 PetriNetUnfolderBase]: 1983/3405 cut-off events. [2024-06-27 19:26:21,130 INFO L125 PetriNetUnfolderBase]: For 188910/188910 co-relation queries the response was YES. [2024-06-27 19:26:21,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20956 conditions, 3405 events. 1983/3405 cut-off events. For 188910/188910 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 20948 event pairs, 475 based on Foata normal form. 2/3403 useless extension candidates. Maximal degree in co-relation 20849. Up to 2849 conditions per place. [2024-06-27 19:26:21,161 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 177 selfloop transitions, 109 changer transitions 0/294 dead transitions. [2024-06-27 19:26:21,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 294 transitions, 4239 flow [2024-06-27 19:26:21,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:21,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:21,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-27 19:26:21,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-27 19:26:21,162 INFO L175 Difference]: Start difference. First operand has 224 places, 267 transitions, 3473 flow. Second operand 7 states and 189 transitions. [2024-06-27 19:26:21,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 294 transitions, 4239 flow [2024-06-27 19:26:21,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 294 transitions, 4031 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 19:26:21,710 INFO L231 Difference]: Finished difference. Result has 225 places, 267 transitions, 3512 flow [2024-06-27 19:26:21,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3265, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3512, PETRI_PLACES=225, PETRI_TRANSITIONS=267} [2024-06-27 19:26:21,711 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-27 19:26:21,711 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 267 transitions, 3512 flow [2024-06-27 19:26:21,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:21,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:21,711 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 19:26:21,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 19:26:21,711 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 19:26:21,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:21,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1172322470, now seen corresponding path program 10 times [2024-06-27 19:26:21,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:21,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238072173] [2024-06-27 19:26:21,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:21,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:21,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:21,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:21,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:21,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238072173] [2024-06-27 19:26:21,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238072173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:21,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:21,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:21,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895601277] [2024-06-27 19:26:21,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:21,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:21,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:21,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:21,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:21,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:21,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 267 transitions, 3512 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:21,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:21,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:21,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:22,301 INFO L124 PetriNetUnfolderBase]: 1975/3385 cut-off events. [2024-06-27 19:26:22,301 INFO L125 PetriNetUnfolderBase]: For 190348/190348 co-relation queries the response was YES. [2024-06-27 19:26:22,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20869 conditions, 3385 events. 1975/3385 cut-off events. For 190348/190348 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 20804 event pairs, 495 based on Foata normal form. 2/3381 useless extension candidates. Maximal degree in co-relation 20761. Up to 2841 conditions per place. [2024-06-27 19:26:22,332 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 183 selfloop transitions, 95 changer transitions 0/286 dead transitions. [2024-06-27 19:26:22,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 286 transitions, 4116 flow [2024-06-27 19:26:22,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:26:22,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:26:22,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-27 19:26:22,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422764227642277 [2024-06-27 19:26:22,333 INFO L175 Difference]: Start difference. First operand has 225 places, 267 transitions, 3512 flow. Second operand 6 states and 158 transitions. [2024-06-27 19:26:22,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 286 transitions, 4116 flow [2024-06-27 19:26:22,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 286 transitions, 3929 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 19:26:22,816 INFO L231 Difference]: Finished difference. Result has 224 places, 267 transitions, 3528 flow [2024-06-27 19:26:22,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3325, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3528, PETRI_PLACES=224, PETRI_TRANSITIONS=267} [2024-06-27 19:26:22,817 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-27 19:26:22,817 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 267 transitions, 3528 flow [2024-06-27 19:26:22,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:22,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:22,817 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 19:26:22,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 19:26:22,817 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 19:26:22,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:22,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1276399050, now seen corresponding path program 1 times [2024-06-27 19:26:22,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:22,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842606551] [2024-06-27 19:26:22,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:22,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:22,893 INFO 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 19:26:22,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:22,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842606551] [2024-06-27 19:26:22,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842606551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:22,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:22,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:22,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433299869] [2024-06-27 19:26:22,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:22,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:22,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:22,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:22,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:22,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:26:22,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 267 transitions, 3528 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:22,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:22,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:26:22,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:23,341 INFO L124 PetriNetUnfolderBase]: 1908/3320 cut-off events. [2024-06-27 19:26:23,341 INFO L125 PetriNetUnfolderBase]: For 191107/191107 co-relation queries the response was YES. [2024-06-27 19:26:23,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20349 conditions, 3320 events. 1908/3320 cut-off events. For 191107/191107 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 20705 event pairs, 347 based on Foata normal form. 7/3304 useless extension candidates. Maximal degree in co-relation 20243. Up to 2753 conditions per place. [2024-06-27 19:26:23,372 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 216 selfloop transitions, 30 changer transitions 1/290 dead transitions. [2024-06-27 19:26:23,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 290 transitions, 4102 flow [2024-06-27 19:26:23,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:26:23,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:26:23,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-06-27 19:26:23,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6731707317073171 [2024-06-27 19:26:23,374 INFO L175 Difference]: Start difference. First operand has 224 places, 267 transitions, 3528 flow. Second operand 5 states and 138 transitions. [2024-06-27 19:26:23,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 290 transitions, 4102 flow [2024-06-27 19:26:23,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 290 transitions, 3750 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 19:26:23,889 INFO L231 Difference]: Finished difference. Result has 220 places, 268 transitions, 3259 flow [2024-06-27 19:26:23,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3176, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3259, PETRI_PLACES=220, PETRI_TRANSITIONS=268} [2024-06-27 19:26:23,889 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 178 predicate places. [2024-06-27 19:26:23,889 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 268 transitions, 3259 flow [2024-06-27 19:26:23,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:23,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:23,890 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 19:26:23,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 19:26:23,890 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 19:26:23,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:23,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1291636170, now seen corresponding path program 2 times [2024-06-27 19:26:23,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:23,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245711423] [2024-06-27 19:26:23,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:23,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:23,960 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 19:26:23,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:23,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245711423] [2024-06-27 19:26:23,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245711423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:23,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:23,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:23,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881504906] [2024-06-27 19:26:23,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:23,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:23,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:23,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:23,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:24,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:26:24,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 268 transitions, 3259 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:24,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:24,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:26:24,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:24,480 INFO L124 PetriNetUnfolderBase]: 1910/3323 cut-off events. [2024-06-27 19:26:24,480 INFO L125 PetriNetUnfolderBase]: For 182233/182238 co-relation queries the response was YES. [2024-06-27 19:26:24,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19828 conditions, 3323 events. 1910/3323 cut-off events. For 182233/182238 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 20872 event pairs, 337 based on Foata normal form. 13/3313 useless extension candidates. Maximal degree in co-relation 19722. Up to 2652 conditions per place. [2024-06-27 19:26:24,511 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 221 selfloop transitions, 25 changer transitions 0/289 dead transitions. [2024-06-27 19:26:24,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 289 transitions, 3957 flow [2024-06-27 19:26:24,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:26:24,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:26:24,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-27 19:26:24,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6439024390243903 [2024-06-27 19:26:24,512 INFO L175 Difference]: Start difference. First operand has 220 places, 268 transitions, 3259 flow. Second operand 5 states and 132 transitions. [2024-06-27 19:26:24,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 289 transitions, 3957 flow [2024-06-27 19:26:24,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 289 transitions, 3902 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 19:26:24,931 INFO L231 Difference]: Finished difference. Result has 222 places, 269 transitions, 3270 flow [2024-06-27 19:26:24,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3204, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3270, PETRI_PLACES=222, PETRI_TRANSITIONS=269} [2024-06-27 19:26:24,931 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-27 19:26:24,931 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 269 transitions, 3270 flow [2024-06-27 19:26:24,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:24,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:24,932 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 19:26:24,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 19:26:24,932 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 19:26:24,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:24,932 INFO L85 PathProgramCache]: Analyzing trace with hash -741790972, now seen corresponding path program 1 times [2024-06-27 19:26:24,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:24,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609926189] [2024-06-27 19:26:24,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:24,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:24,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:25,023 INFO 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 19:26:25,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:25,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609926189] [2024-06-27 19:26:25,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609926189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:25,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:25,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:25,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846533119] [2024-06-27 19:26:25,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:25,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:25,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:25,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:25,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:25,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:25,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 269 transitions, 3270 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:25,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:25,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:25,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:25,497 INFO L124 PetriNetUnfolderBase]: 2013/3457 cut-off events. [2024-06-27 19:26:25,497 INFO L125 PetriNetUnfolderBase]: For 176983/176989 co-relation queries the response was YES. [2024-06-27 19:26:25,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20624 conditions, 3457 events. 2013/3457 cut-off events. For 176983/176989 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 21363 event pairs, 453 based on Foata normal form. 6/3460 useless extension candidates. Maximal degree in co-relation 20517. Up to 3089 conditions per place. [2024-06-27 19:26:25,528 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 255 selfloop transitions, 29 changer transitions 0/292 dead transitions. [2024-06-27 19:26:25,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 292 transitions, 4082 flow [2024-06-27 19:26:25,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:26:25,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:26:25,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 19:26:25,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-27 19:26:25,529 INFO L175 Difference]: Start difference. First operand has 222 places, 269 transitions, 3270 flow. Second operand 6 states and 146 transitions. [2024-06-27 19:26:25,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 292 transitions, 4082 flow [2024-06-27 19:26:26,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 292 transitions, 4039 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 19:26:26,014 INFO L231 Difference]: Finished difference. Result has 226 places, 273 transitions, 3366 flow [2024-06-27 19:26:26,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3227, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3366, PETRI_PLACES=226, PETRI_TRANSITIONS=273} [2024-06-27 19:26:26,015 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-27 19:26:26,015 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 273 transitions, 3366 flow [2024-06-27 19:26:26,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:26,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:26,015 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 19:26:26,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 19:26:26,016 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 19:26:26,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:26,016 INFO L85 PathProgramCache]: Analyzing trace with hash -182782248, now seen corresponding path program 2 times [2024-06-27 19:26:26,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:26,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134813586] [2024-06-27 19:26:26,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:26,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:26,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:26,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:26,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134813586] [2024-06-27 19:26:26,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134813586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:26,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:26,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:26,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953131891] [2024-06-27 19:26:26,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:26,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:26,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:26,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:26,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:26,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:26,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 273 transitions, 3366 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:26,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:26,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:26,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:26,617 INFO L124 PetriNetUnfolderBase]: 2021/3474 cut-off events. [2024-06-27 19:26:26,617 INFO L125 PetriNetUnfolderBase]: For 182500/182506 co-relation queries the response was YES. [2024-06-27 19:26:26,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20777 conditions, 3474 events. 2021/3474 cut-off events. For 182500/182506 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 21502 event pairs, 484 based on Foata normal form. 6/3477 useless extension candidates. Maximal degree in co-relation 20669. Up to 3134 conditions per place. [2024-06-27 19:26:26,650 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 255 selfloop transitions, 26 changer transitions 0/289 dead transitions. [2024-06-27 19:26:26,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 289 transitions, 4002 flow [2024-06-27 19:26:26,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:26:26,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:26:26,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-27 19:26:26,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-27 19:26:26,651 INFO L175 Difference]: Start difference. First operand has 226 places, 273 transitions, 3366 flow. Second operand 6 states and 141 transitions. [2024-06-27 19:26:26,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 289 transitions, 4002 flow [2024-06-27 19:26:27,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 289 transitions, 3908 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-27 19:26:27,426 INFO L231 Difference]: Finished difference. Result has 230 places, 275 transitions, 3373 flow [2024-06-27 19:26:27,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3290, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3373, PETRI_PLACES=230, PETRI_TRANSITIONS=275} [2024-06-27 19:26:27,427 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-27 19:26:27,427 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 275 transitions, 3373 flow [2024-06-27 19:26:27,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:27,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:27,427 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 19:26:27,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 19:26:27,428 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 19:26:27,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:27,428 INFO L85 PathProgramCache]: Analyzing trace with hash 486621522, now seen corresponding path program 3 times [2024-06-27 19:26:27,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:27,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218133979] [2024-06-27 19:26:27,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:27,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:27,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:27,512 INFO 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 19:26:27,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:27,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218133979] [2024-06-27 19:26:27,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218133979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:27,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:27,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:27,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602781212] [2024-06-27 19:26:27,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:27,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:27,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:27,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:27,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:27,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:27,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 275 transitions, 3373 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 19:26:27,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:27,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:27,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:27,963 INFO L124 PetriNetUnfolderBase]: 2029/3482 cut-off events. [2024-06-27 19:26:27,963 INFO L125 PetriNetUnfolderBase]: For 187293/187293 co-relation queries the response was YES. [2024-06-27 19:26:27,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20850 conditions, 3482 events. 2029/3482 cut-off events. For 187293/187293 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 21460 event pairs, 484 based on Foata normal form. 2/3480 useless extension candidates. Maximal degree in co-relation 20740. Up to 3146 conditions per place. [2024-06-27 19:26:27,994 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 256 selfloop transitions, 28 changer transitions 0/292 dead transitions. [2024-06-27 19:26:27,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 292 transitions, 4003 flow [2024-06-27 19:26:27,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:27,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:27,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-27 19:26:27,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2024-06-27 19:26:27,995 INFO L175 Difference]: Start difference. First operand has 230 places, 275 transitions, 3373 flow. Second operand 7 states and 160 transitions. [2024-06-27 19:26:27,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 292 transitions, 4003 flow [2024-06-27 19:26:28,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 292 transitions, 3940 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 19:26:28,527 INFO L231 Difference]: Finished difference. Result has 233 places, 277 transitions, 3401 flow [2024-06-27 19:26:28,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3310, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3401, PETRI_PLACES=233, PETRI_TRANSITIONS=277} [2024-06-27 19:26:28,527 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-27 19:26:28,527 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 277 transitions, 3401 flow [2024-06-27 19:26:28,527 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 19:26:28,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:28,527 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 19:26:28,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 19:26:28,528 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 19:26:28,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:28,528 INFO L85 PathProgramCache]: Analyzing trace with hash -665306578, now seen corresponding path program 1 times [2024-06-27 19:26:28,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:28,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637381909] [2024-06-27 19:26:28,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:28,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:28,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:28,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:28,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637381909] [2024-06-27 19:26:28,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637381909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:28,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:28,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:28,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018361404] [2024-06-27 19:26:28,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:28,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:28,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:28,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:28,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:28,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:28,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 277 transitions, 3401 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 19:26:28,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:28,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:28,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:29,078 INFO L124 PetriNetUnfolderBase]: 2045/3490 cut-off events. [2024-06-27 19:26:29,079 INFO L125 PetriNetUnfolderBase]: For 198703/198703 co-relation queries the response was YES. [2024-06-27 19:26:29,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21126 conditions, 3490 events. 2045/3490 cut-off events. For 198703/198703 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 21516 event pairs, 530 based on Foata normal form. 4/3486 useless extension candidates. Maximal degree in co-relation 21015. Up to 2935 conditions per place. [2024-06-27 19:26:29,110 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 185 selfloop transitions, 102 changer transitions 0/295 dead transitions. [2024-06-27 19:26:29,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 295 transitions, 4071 flow [2024-06-27 19:26:29,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:29,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:29,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 19:26:29,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-27 19:26:29,111 INFO L175 Difference]: Start difference. First operand has 233 places, 277 transitions, 3401 flow. Second operand 7 states and 168 transitions. [2024-06-27 19:26:29,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 295 transitions, 4071 flow [2024-06-27 19:26:29,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 295 transitions, 4000 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 19:26:29,640 INFO L231 Difference]: Finished difference. Result has 235 places, 280 transitions, 3606 flow [2024-06-27 19:26:29,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3330, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3606, PETRI_PLACES=235, PETRI_TRANSITIONS=280} [2024-06-27 19:26:29,640 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-27 19:26:29,641 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 280 transitions, 3606 flow [2024-06-27 19:26:29,641 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 19:26:29,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:29,641 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 19:26:29,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 19:26:29,641 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 19:26:29,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:29,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1524015788, now seen corresponding path program 4 times [2024-06-27 19:26:29,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:29,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587358896] [2024-06-27 19:26:29,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:29,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:29,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:29,716 INFO 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 19:26:29,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:29,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587358896] [2024-06-27 19:26:29,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587358896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:29,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:29,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:26:29,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992765622] [2024-06-27 19:26:29,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:29,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:26:29,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:29,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:26:29,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:26:29,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:29,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 280 transitions, 3606 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:29,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:29,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:29,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:30,251 INFO L124 PetriNetUnfolderBase]: 2040/3497 cut-off events. [2024-06-27 19:26:30,252 INFO L125 PetriNetUnfolderBase]: For 195684/195684 co-relation queries the response was YES. [2024-06-27 19:26:30,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21402 conditions, 3497 events. 2040/3497 cut-off events. For 195684/195684 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 21521 event pairs, 446 based on Foata normal form. 2/3497 useless extension candidates. Maximal degree in co-relation 21290. Up to 3154 conditions per place. [2024-06-27 19:26:30,281 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 270 selfloop transitions, 22 changer transitions 0/300 dead transitions. [2024-06-27 19:26:30,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 300 transitions, 4240 flow [2024-06-27 19:26:30,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:26:30,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:26:30,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 19:26:30,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-27 19:26:30,282 INFO L175 Difference]: Start difference. First operand has 235 places, 280 transitions, 3606 flow. Second operand 6 states and 148 transitions. [2024-06-27 19:26:30,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 300 transitions, 4240 flow [2024-06-27 19:26:30,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 300 transitions, 3974 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 19:26:30,749 INFO L231 Difference]: Finished difference. Result has 236 places, 280 transitions, 3392 flow [2024-06-27 19:26:30,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3340, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3392, PETRI_PLACES=236, PETRI_TRANSITIONS=280} [2024-06-27 19:26:30,750 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-27 19:26:30,750 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 280 transitions, 3392 flow [2024-06-27 19:26:30,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:30,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:30,751 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 19:26:30,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 19:26:30,751 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 19:26:30,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:30,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1055171084, now seen corresponding path program 2 times [2024-06-27 19:26:30,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:30,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441417824] [2024-06-27 19:26:30,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:30,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:30,847 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 19:26:30,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:30,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441417824] [2024-06-27 19:26:30,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441417824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:30,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:30,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:30,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036299690] [2024-06-27 19:26:30,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:30,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:30,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:30,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:30,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:30,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:30,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 280 transitions, 3392 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 19:26:30,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:30,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:30,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:31,469 INFO L124 PetriNetUnfolderBase]: 2084/3560 cut-off events. [2024-06-27 19:26:31,469 INFO L125 PetriNetUnfolderBase]: For 225442/225442 co-relation queries the response was YES. [2024-06-27 19:26:31,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21649 conditions, 3560 events. 2084/3560 cut-off events. For 225442/225442 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 22038 event pairs, 504 based on Foata normal form. 12/3566 useless extension candidates. Maximal degree in co-relation 21536. Up to 2968 conditions per place. [2024-06-27 19:26:31,503 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 196 selfloop transitions, 100 changer transitions 0/304 dead transitions. [2024-06-27 19:26:31,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 304 transitions, 4116 flow [2024-06-27 19:26:31,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:31,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:31,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 19:26:31,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-27 19:26:31,504 INFO L175 Difference]: Start difference. First operand has 236 places, 280 transitions, 3392 flow. Second operand 7 states and 178 transitions. [2024-06-27 19:26:31,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 304 transitions, 4116 flow [2024-06-27 19:26:32,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 304 transitions, 4058 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 19:26:32,026 INFO L231 Difference]: Finished difference. Result has 238 places, 283 transitions, 3614 flow [2024-06-27 19:26:32,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3334, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3614, PETRI_PLACES=238, PETRI_TRANSITIONS=283} [2024-06-27 19:26:32,027 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-27 19:26:32,027 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 283 transitions, 3614 flow [2024-06-27 19:26:32,027 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 19:26:32,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:32,027 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 19:26:32,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 19:26:32,027 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 19:26:32,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:32,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1283072234, now seen corresponding path program 3 times [2024-06-27 19:26:32,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:32,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959195944] [2024-06-27 19:26:32,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:32,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:32,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:32,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:32,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:32,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959195944] [2024-06-27 19:26:32,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959195944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:32,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:32,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:32,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724976754] [2024-06-27 19:26:32,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:32,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:32,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:32,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:32,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:32,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:32,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 283 transitions, 3614 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 19:26:32,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:32,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:32,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:32,694 INFO L124 PetriNetUnfolderBase]: 2128/3618 cut-off events. [2024-06-27 19:26:32,694 INFO L125 PetriNetUnfolderBase]: For 236750/236750 co-relation queries the response was YES. [2024-06-27 19:26:32,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22728 conditions, 3618 events. 2128/3618 cut-off events. For 236750/236750 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 22370 event pairs, 509 based on Foata normal form. 12/3624 useless extension candidates. Maximal degree in co-relation 22614. Up to 3036 conditions per place. [2024-06-27 19:26:32,731 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 194 selfloop transitions, 103 changer transitions 0/305 dead transitions. [2024-06-27 19:26:32,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 305 transitions, 4340 flow [2024-06-27 19:26:32,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:26:32,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:26:32,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 19:26:32,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-27 19:26:32,732 INFO L175 Difference]: Start difference. First operand has 238 places, 283 transitions, 3614 flow. Second operand 8 states and 196 transitions. [2024-06-27 19:26:32,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 305 transitions, 4340 flow [2024-06-27 19:26:33,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 305 transitions, 4092 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 19:26:33,370 INFO L231 Difference]: Finished difference. Result has 241 places, 286 transitions, 3658 flow [2024-06-27 19:26:33,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3366, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3658, PETRI_PLACES=241, PETRI_TRANSITIONS=286} [2024-06-27 19:26:33,370 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-27 19:26:33,370 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 286 transitions, 3658 flow [2024-06-27 19:26:33,370 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 19:26:33,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:33,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:33,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 19:26:33,371 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 19:26:33,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:33,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1291643114, now seen corresponding path program 4 times [2024-06-27 19:26:33,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:33,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629422146] [2024-06-27 19:26:33,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:33,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:33,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:33,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:33,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:33,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629422146] [2024-06-27 19:26:33,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629422146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:33,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:33,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:33,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152697112] [2024-06-27 19:26:33,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:33,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:33,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:33,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:33,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:33,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:33,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 286 transitions, 3658 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 19:26:33,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:33,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:33,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:34,244 INFO L124 PetriNetUnfolderBase]: 2398/4064 cut-off events. [2024-06-27 19:26:34,244 INFO L125 PetriNetUnfolderBase]: For 338825/338825 co-relation queries the response was YES. [2024-06-27 19:26:34,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27505 conditions, 4064 events. 2398/4064 cut-off events. For 338825/338825 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 25597 event pairs, 613 based on Foata normal form. 12/4070 useless extension candidates. Maximal degree in co-relation 27390. Up to 2917 conditions per place. [2024-06-27 19:26:34,283 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 201 selfloop transitions, 109 changer transitions 0/318 dead transitions. [2024-06-27 19:26:34,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 318 transitions, 4645 flow [2024-06-27 19:26:34,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:26:34,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:26:34,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 19:26:34,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-27 19:26:34,284 INFO L175 Difference]: Start difference. First operand has 241 places, 286 transitions, 3658 flow. Second operand 8 states and 202 transitions. [2024-06-27 19:26:34,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 318 transitions, 4645 flow [2024-06-27 19:26:34,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 318 transitions, 4385 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 19:26:34,917 INFO L231 Difference]: Finished difference. Result has 244 places, 292 transitions, 3785 flow [2024-06-27 19:26:34,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3398, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3785, PETRI_PLACES=244, PETRI_TRANSITIONS=292} [2024-06-27 19:26:34,918 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-27 19:26:34,918 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 292 transitions, 3785 flow [2024-06-27 19:26:34,918 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 19:26:34,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:34,918 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 19:26:34,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 19:26:34,918 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 19:26:34,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:34,919 INFO L85 PathProgramCache]: Analyzing trace with hash -990747232, now seen corresponding path program 1 times [2024-06-27 19:26:34,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:34,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596464169] [2024-06-27 19:26:34,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:34,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:34,993 INFO 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 19:26:34,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:34,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596464169] [2024-06-27 19:26:34,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596464169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:34,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:34,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:34,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575193959] [2024-06-27 19:26:34,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:34,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:34,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:34,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:34,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:35,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:35,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 292 transitions, 3785 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 19:26:35,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:35,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:35,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:35,632 INFO L124 PetriNetUnfolderBase]: 2411/4102 cut-off events. [2024-06-27 19:26:35,632 INFO L125 PetriNetUnfolderBase]: For 320588/320588 co-relation queries the response was YES. [2024-06-27 19:26:35,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27799 conditions, 4102 events. 2411/4102 cut-off events. For 320588/320588 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 25907 event pairs, 628 based on Foata normal form. 1/4099 useless extension candidates. Maximal degree in co-relation 27682. Up to 3672 conditions per place. [2024-06-27 19:26:35,673 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 271 selfloop transitions, 50 changer transitions 0/329 dead transitions. [2024-06-27 19:26:35,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 329 transitions, 4761 flow [2024-06-27 19:26:35,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:26:35,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:26:35,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-27 19:26:35,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-27 19:26:35,674 INFO L175 Difference]: Start difference. First operand has 244 places, 292 transitions, 3785 flow. Second operand 8 states and 201 transitions. [2024-06-27 19:26:35,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 329 transitions, 4761 flow [2024-06-27 19:26:36,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 329 transitions, 4555 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-27 19:26:36,537 INFO L231 Difference]: Finished difference. Result has 249 places, 298 transitions, 3822 flow [2024-06-27 19:26:36,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3579, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3822, PETRI_PLACES=249, PETRI_TRANSITIONS=298} [2024-06-27 19:26:36,538 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-27 19:26:36,538 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 298 transitions, 3822 flow [2024-06-27 19:26:36,538 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 19:26:36,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:36,538 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 19:26:36,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 19:26:36,538 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 19:26:36,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:36,539 INFO L85 PathProgramCache]: Analyzing trace with hash 393192562, now seen corresponding path program 2 times [2024-06-27 19:26:36,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:36,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840341205] [2024-06-27 19:26:36,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:36,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:36,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:36,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:36,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840341205] [2024-06-27 19:26:36,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840341205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:36,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:36,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:36,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101743685] [2024-06-27 19:26:36,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:36,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:36,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:36,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:36,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:36,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:36,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 298 transitions, 3822 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 19:26:36,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:36,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:36,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:37,301 INFO L124 PetriNetUnfolderBase]: 2448/4153 cut-off events. [2024-06-27 19:26:37,302 INFO L125 PetriNetUnfolderBase]: For 346537/346537 co-relation queries the response was YES. [2024-06-27 19:26:37,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28701 conditions, 4153 events. 2448/4153 cut-off events. For 346537/346537 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 26223 event pairs, 660 based on Foata normal form. 1/4138 useless extension candidates. Maximal degree in co-relation 28581. Up to 3295 conditions per place. [2024-06-27 19:26:37,345 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 177 selfloop transitions, 155 changer transitions 0/340 dead transitions. [2024-06-27 19:26:37,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 340 transitions, 5320 flow [2024-06-27 19:26:37,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:37,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:37,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-27 19:26:37,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6445993031358885 [2024-06-27 19:26:37,346 INFO L175 Difference]: Start difference. First operand has 249 places, 298 transitions, 3822 flow. Second operand 7 states and 185 transitions. [2024-06-27 19:26:37,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 340 transitions, 5320 flow [2024-06-27 19:26:38,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 340 transitions, 5192 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-27 19:26:38,046 INFO L231 Difference]: Finished difference. Result has 253 places, 312 transitions, 4291 flow [2024-06-27 19:26:38,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3694, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4291, PETRI_PLACES=253, PETRI_TRANSITIONS=312} [2024-06-27 19:26:38,046 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-27 19:26:38,046 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 312 transitions, 4291 flow [2024-06-27 19:26:38,047 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 19:26:38,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:38,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:38,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 19:26:38,047 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 19:26:38,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:38,047 INFO L85 PathProgramCache]: Analyzing trace with hash 403668082, now seen corresponding path program 3 times [2024-06-27 19:26:38,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:38,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061871909] [2024-06-27 19:26:38,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:38,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:38,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:38,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:38,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061871909] [2024-06-27 19:26:38,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061871909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:38,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:38,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:38,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143763300] [2024-06-27 19:26:38,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:38,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:38,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:38,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:38,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:38,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:38,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 312 transitions, 4291 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 19:26:38,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:38,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:38,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:38,745 INFO L124 PetriNetUnfolderBase]: 2453/4158 cut-off events. [2024-06-27 19:26:38,745 INFO L125 PetriNetUnfolderBase]: For 360761/360761 co-relation queries the response was YES. [2024-06-27 19:26:38,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29954 conditions, 4158 events. 2453/4158 cut-off events. For 360761/360761 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 26259 event pairs, 658 based on Foata normal form. 1/4143 useless extension candidates. Maximal degree in co-relation 29831. Up to 3297 conditions per place. [2024-06-27 19:26:38,788 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 175 selfloop transitions, 157 changer transitions 0/340 dead transitions. [2024-06-27 19:26:38,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 340 transitions, 5622 flow [2024-06-27 19:26:38,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:38,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:38,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 19:26:38,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-27 19:26:38,789 INFO L175 Difference]: Start difference. First operand has 253 places, 312 transitions, 4291 flow. Second operand 7 states and 181 transitions. [2024-06-27 19:26:38,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 340 transitions, 5622 flow [2024-06-27 19:26:39,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 340 transitions, 5427 flow, removed 83 selfloop flow, removed 1 redundant places. [2024-06-27 19:26:39,587 INFO L231 Difference]: Finished difference. Result has 259 places, 315 transitions, 4501 flow [2024-06-27 19:26:39,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4124, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4501, PETRI_PLACES=259, PETRI_TRANSITIONS=315} [2024-06-27 19:26:39,588 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-27 19:26:39,588 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 315 transitions, 4501 flow [2024-06-27 19:26:39,588 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 19:26:39,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:39,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:39,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 19:26:39,588 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 19:26:39,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:39,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1314171190, now seen corresponding path program 4 times [2024-06-27 19:26:39,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:39,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316781196] [2024-06-27 19:26:39,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:39,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:39,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:39,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:39,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316781196] [2024-06-27 19:26:39,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316781196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:39,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:39,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:39,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074947379] [2024-06-27 19:26:39,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:39,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:39,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:39,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:39,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:39,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:39,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 315 transitions, 4501 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 19:26:39,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:39,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:39,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:40,352 INFO L124 PetriNetUnfolderBase]: 2466/4188 cut-off events. [2024-06-27 19:26:40,352 INFO L125 PetriNetUnfolderBase]: For 367048/367048 co-relation queries the response was YES. [2024-06-27 19:26:40,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29341 conditions, 4188 events. 2466/4188 cut-off events. For 367048/367048 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 26509 event pairs, 627 based on Foata normal form. 1/4185 useless extension candidates. Maximal degree in co-relation 29215. Up to 3772 conditions per place. [2024-06-27 19:26:40,397 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 289 selfloop transitions, 44 changer transitions 0/341 dead transitions. [2024-06-27 19:26:40,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 341 transitions, 5494 flow [2024-06-27 19:26:40,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:26:40,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:26:40,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-27 19:26:40,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-27 19:26:40,398 INFO L175 Difference]: Start difference. First operand has 259 places, 315 transitions, 4501 flow. Second operand 8 states and 190 transitions. [2024-06-27 19:26:40,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 341 transitions, 5494 flow [2024-06-27 19:26:41,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 341 transitions, 5162 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 19:26:41,322 INFO L231 Difference]: Finished difference. Result has 264 places, 321 transitions, 4407 flow [2024-06-27 19:26:41,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4178, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4407, PETRI_PLACES=264, PETRI_TRANSITIONS=321} [2024-06-27 19:26:41,322 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2024-06-27 19:26:41,323 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 321 transitions, 4407 flow [2024-06-27 19:26:41,323 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 19:26:41,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:41,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:41,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 19:26:41,323 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 19:26:41,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:41,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1305899258, now seen corresponding path program 5 times [2024-06-27 19:26:41,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:41,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978871750] [2024-06-27 19:26:41,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:41,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:41,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:41,384 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 19:26:41,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:41,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978871750] [2024-06-27 19:26:41,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978871750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:41,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:41,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:41,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304349960] [2024-06-27 19:26:41,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:41,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:41,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:41,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:41,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:41,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:41,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 321 transitions, 4407 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 19:26:41,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:41,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:41,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:41,983 INFO L124 PetriNetUnfolderBase]: 2471/4165 cut-off events. [2024-06-27 19:26:41,983 INFO L125 PetriNetUnfolderBase]: For 376363/376363 co-relation queries the response was YES. [2024-06-27 19:26:42,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29189 conditions, 4165 events. 2471/4165 cut-off events. For 376363/376363 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 26372 event pairs, 714 based on Foata normal form. 1/4150 useless extension candidates. Maximal degree in co-relation 29061. Up to 3307 conditions per place. [2024-06-27 19:26:42,027 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 196 selfloop transitions, 150 changer transitions 0/354 dead transitions. [2024-06-27 19:26:42,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 354 transitions, 5859 flow [2024-06-27 19:26:42,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:42,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:42,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 19:26:42,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-27 19:26:42,027 INFO L175 Difference]: Start difference. First operand has 264 places, 321 transitions, 4407 flow. Second operand 7 states and 179 transitions. [2024-06-27 19:26:42,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 354 transitions, 5859 flow [2024-06-27 19:26:42,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 354 transitions, 5740 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-27 19:26:42,802 INFO L231 Difference]: Finished difference. Result has 267 places, 331 transitions, 4852 flow [2024-06-27 19:26:42,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4288, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4852, PETRI_PLACES=267, PETRI_TRANSITIONS=331} [2024-06-27 19:26:42,802 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 225 predicate places. [2024-06-27 19:26:42,802 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 331 transitions, 4852 flow [2024-06-27 19:26:42,802 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 19:26:42,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:42,802 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 19:26:42,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 19:26:42,803 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 19:26:42,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:42,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1174078500, now seen corresponding path program 6 times [2024-06-27 19:26:42,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:42,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637095227] [2024-06-27 19:26:42,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:42,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:42,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:42,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:42,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:42,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637095227] [2024-06-27 19:26:42,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637095227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:42,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:42,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:42,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728454091] [2024-06-27 19:26:42,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:42,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:42,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:42,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:42,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:42,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:42,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 331 transitions, 4852 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 19:26:42,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:42,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:42,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:43,562 INFO L124 PetriNetUnfolderBase]: 2476/4174 cut-off events. [2024-06-27 19:26:43,563 INFO L125 PetriNetUnfolderBase]: For 389232/389232 co-relation queries the response was YES. [2024-06-27 19:26:43,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29784 conditions, 4174 events. 2476/4174 cut-off events. For 389232/389232 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 26401 event pairs, 714 based on Foata normal form. 1/4159 useless extension candidates. Maximal degree in co-relation 29655. Up to 3309 conditions per place. [2024-06-27 19:26:43,604 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 195 selfloop transitions, 151 changer transitions 0/354 dead transitions. [2024-06-27 19:26:43,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 354 transitions, 6140 flow [2024-06-27 19:26:43,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:43,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:43,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 19:26:43,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-27 19:26:43,605 INFO L175 Difference]: Start difference. First operand has 267 places, 331 transitions, 4852 flow. Second operand 7 states and 176 transitions. [2024-06-27 19:26:43,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 354 transitions, 6140 flow [2024-06-27 19:26:44,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 354 transitions, 5949 flow, removed 78 selfloop flow, removed 2 redundant places. [2024-06-27 19:26:44,637 INFO L231 Difference]: Finished difference. Result has 272 places, 334 transitions, 5061 flow [2024-06-27 19:26:44,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4693, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5061, PETRI_PLACES=272, PETRI_TRANSITIONS=334} [2024-06-27 19:26:44,637 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-27 19:26:44,637 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 334 transitions, 5061 flow [2024-06-27 19:26:44,637 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 19:26:44,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:44,638 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 19:26:44,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 19:26:44,638 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 19:26:44,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:44,638 INFO L85 PathProgramCache]: Analyzing trace with hash 836019214, now seen corresponding path program 7 times [2024-06-27 19:26:44,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:44,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109864605] [2024-06-27 19:26:44,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:44,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:44,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:44,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:44,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:44,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109864605] [2024-06-27 19:26:44,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109864605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:44,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:44,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:44,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136238408] [2024-06-27 19:26:44,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:44,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:44,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:44,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:44,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:44,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:44,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 334 transitions, 5061 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 19:26:44,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:44,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:44,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:45,360 INFO L124 PetriNetUnfolderBase]: 2494/4201 cut-off events. [2024-06-27 19:26:45,360 INFO L125 PetriNetUnfolderBase]: For 406207/406207 co-relation queries the response was YES. [2024-06-27 19:26:45,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30473 conditions, 4201 events. 2494/4201 cut-off events. For 406207/406207 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 26549 event pairs, 713 based on Foata normal form. 2/4187 useless extension candidates. Maximal degree in co-relation 30342. Up to 3321 conditions per place. [2024-06-27 19:26:45,408 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 197 selfloop transitions, 153 changer transitions 0/358 dead transitions. [2024-06-27 19:26:45,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 358 transitions, 6415 flow [2024-06-27 19:26:45,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:45,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:45,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 19:26:45,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-27 19:26:45,409 INFO L175 Difference]: Start difference. First operand has 272 places, 334 transitions, 5061 flow. Second operand 7 states and 174 transitions. [2024-06-27 19:26:45,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 358 transitions, 6415 flow [2024-06-27 19:26:46,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 358 transitions, 6150 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-27 19:26:46,283 INFO L231 Difference]: Finished difference. Result has 276 places, 341 transitions, 5263 flow [2024-06-27 19:26:46,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4802, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5263, PETRI_PLACES=276, PETRI_TRANSITIONS=341} [2024-06-27 19:26:46,284 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-27 19:26:46,284 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 341 transitions, 5263 flow [2024-06-27 19:26:46,284 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 19:26:46,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:46,284 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 19:26:46,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 19:26:46,284 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 19:26:46,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:46,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1973978012, now seen corresponding path program 8 times [2024-06-27 19:26:46,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:46,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630452992] [2024-06-27 19:26:46,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:46,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:46,355 INFO 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 19:26:46,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:46,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630452992] [2024-06-27 19:26:46,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630452992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:46,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:46,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:46,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172604788] [2024-06-27 19:26:46,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:46,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:46,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:46,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:46,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:46,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:46,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 341 transitions, 5263 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 19:26:46,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:46,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:46,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:47,134 INFO L124 PetriNetUnfolderBase]: 2512/4256 cut-off events. [2024-06-27 19:26:47,134 INFO L125 PetriNetUnfolderBase]: For 418789/418789 co-relation queries the response was YES. [2024-06-27 19:26:47,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30942 conditions, 4256 events. 2512/4256 cut-off events. For 418789/418789 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 27058 event pairs, 645 based on Foata normal form. 2/4252 useless extension candidates. Maximal degree in co-relation 30810. Up to 3537 conditions per place. [2024-06-27 19:26:47,175 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 244 selfloop transitions, 121 changer transitions 0/373 dead transitions. [2024-06-27 19:26:47,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 373 transitions, 6493 flow [2024-06-27 19:26:47,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:47,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:47,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 19:26:47,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6411149825783972 [2024-06-27 19:26:47,176 INFO L175 Difference]: Start difference. First operand has 276 places, 341 transitions, 5263 flow. Second operand 7 states and 184 transitions. [2024-06-27 19:26:47,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 373 transitions, 6493 flow [2024-06-27 19:26:48,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 373 transitions, 6170 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-27 19:26:48,041 INFO L231 Difference]: Finished difference. Result has 281 places, 347 transitions, 5376 flow [2024-06-27 19:26:48,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4952, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5376, PETRI_PLACES=281, PETRI_TRANSITIONS=347} [2024-06-27 19:26:48,041 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-27 19:26:48,041 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 347 transitions, 5376 flow [2024-06-27 19:26:48,042 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 19:26:48,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:48,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:48,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 19:26:48,042 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 19:26:48,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:48,042 INFO L85 PathProgramCache]: Analyzing trace with hash 515288210, now seen corresponding path program 9 times [2024-06-27 19:26:48,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:48,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613119710] [2024-06-27 19:26:48,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:48,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:48,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:48,124 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 19:26:48,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:48,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613119710] [2024-06-27 19:26:48,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613119710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:48,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:48,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:48,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753575192] [2024-06-27 19:26:48,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:48,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:48,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:48,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:48,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:48,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:48,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 347 transitions, 5376 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 19:26:48,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:48,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:48,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:48,952 INFO L124 PetriNetUnfolderBase]: 2506/4264 cut-off events. [2024-06-27 19:26:48,952 INFO L125 PetriNetUnfolderBase]: For 420866/420866 co-relation queries the response was YES. [2024-06-27 19:26:48,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30828 conditions, 4264 events. 2506/4264 cut-off events. For 420866/420866 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 27175 event pairs, 629 based on Foata normal form. 2/4262 useless extension candidates. Maximal degree in co-relation 30694. Up to 3534 conditions per place. [2024-06-27 19:26:48,999 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 237 selfloop transitions, 135 changer transitions 0/380 dead transitions. [2024-06-27 19:26:49,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 380 transitions, 6540 flow [2024-06-27 19:26:49,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:26:49,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:26:49,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-27 19:26:49,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6524390243902439 [2024-06-27 19:26:49,001 INFO L175 Difference]: Start difference. First operand has 281 places, 347 transitions, 5376 flow. Second operand 8 states and 214 transitions. [2024-06-27 19:26:49,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 380 transitions, 6540 flow [2024-06-27 19:26:50,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 380 transitions, 6281 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 19:26:50,094 INFO L231 Difference]: Finished difference. Result has 284 places, 348 transitions, 5493 flow [2024-06-27 19:26:50,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5117, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5493, PETRI_PLACES=284, PETRI_TRANSITIONS=348} [2024-06-27 19:26:50,094 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-27 19:26:50,095 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 348 transitions, 5493 flow [2024-06-27 19:26:50,095 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 19:26:50,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:50,095 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 19:26:50,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 19:26:50,095 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 19:26:50,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:50,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1520682533, now seen corresponding path program 1 times [2024-06-27 19:26:50,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:50,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725993416] [2024-06-27 19:26:50,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:50,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:50,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:26:50,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:50,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725993416] [2024-06-27 19:26:50,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725993416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:50,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:50,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:50,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127848781] [2024-06-27 19:26:50,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:50,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:50,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:50,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:50,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:50,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:50,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 348 transitions, 5493 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:50,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:50,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:50,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:51,013 INFO L124 PetriNetUnfolderBase]: 2731/4650 cut-off events. [2024-06-27 19:26:51,013 INFO L125 PetriNetUnfolderBase]: For 571714/571720 co-relation queries the response was YES. [2024-06-27 19:26:51,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35788 conditions, 4650 events. 2731/4650 cut-off events. For 571714/571720 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 30196 event pairs, 660 based on Foata normal form. 16/4659 useless extension candidates. Maximal degree in co-relation 35652. Up to 3426 conditions per place. [2024-06-27 19:26:51,060 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 279 selfloop transitions, 99 changer transitions 0/386 dead transitions. [2024-06-27 19:26:51,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 386 transitions, 6851 flow [2024-06-27 19:26:51,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:51,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:51,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 19:26:51,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-27 19:26:51,061 INFO L175 Difference]: Start difference. First operand has 284 places, 348 transitions, 5493 flow. Second operand 7 states and 179 transitions. [2024-06-27 19:26:51,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 386 transitions, 6851 flow [2024-06-27 19:26:52,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 386 transitions, 6644 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 19:26:52,292 INFO L231 Difference]: Finished difference. Result has 287 places, 354 transitions, 5667 flow [2024-06-27 19:26:52,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5290, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5667, PETRI_PLACES=287, PETRI_TRANSITIONS=354} [2024-06-27 19:26:52,293 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 245 predicate places. [2024-06-27 19:26:52,293 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 354 transitions, 5667 flow [2024-06-27 19:26:52,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:52,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:52,293 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 19:26:52,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 19:26:52,293 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 19:26:52,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:52,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1291119211, now seen corresponding path program 2 times [2024-06-27 19:26:52,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:52,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987082675] [2024-06-27 19:26:52,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:52,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:52,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:52,362 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 19:26:52,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:52,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987082675] [2024-06-27 19:26:52,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987082675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:52,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:52,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:52,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174753227] [2024-06-27 19:26:52,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:52,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:52,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:52,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:52,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:52,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:52,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 354 transitions, 5667 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:52,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:52,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:52,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:53,121 INFO L124 PetriNetUnfolderBase]: 2787/4731 cut-off events. [2024-06-27 19:26:53,121 INFO L125 PetriNetUnfolderBase]: For 588346/588352 co-relation queries the response was YES. [2024-06-27 19:26:53,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36759 conditions, 4731 events. 2787/4731 cut-off events. For 588346/588352 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 30756 event pairs, 760 based on Foata normal form. 20/4744 useless extension candidates. Maximal degree in co-relation 36620. Up to 4027 conditions per place. [2024-06-27 19:26:53,179 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 271 selfloop transitions, 95 changer transitions 0/374 dead transitions. [2024-06-27 19:26:53,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 374 transitions, 6504 flow [2024-06-27 19:26:53,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:53,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:53,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 19:26:53,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-27 19:26:53,187 INFO L175 Difference]: Start difference. First operand has 287 places, 354 transitions, 5667 flow. Second operand 7 states and 170 transitions. [2024-06-27 19:26:53,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 374 transitions, 6504 flow [2024-06-27 19:26:54,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 374 transitions, 6363 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-27 19:26:54,319 INFO L231 Difference]: Finished difference. Result has 292 places, 356 transitions, 5775 flow [2024-06-27 19:26:54,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5526, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5775, PETRI_PLACES=292, PETRI_TRANSITIONS=356} [2024-06-27 19:26:54,320 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-27 19:26:54,320 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 356 transitions, 5775 flow [2024-06-27 19:26:54,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:54,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:54,320 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 19:26:54,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 19:26:54,321 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 19:26:54,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:54,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1290971341, now seen corresponding path program 3 times [2024-06-27 19:26:54,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:54,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520266735] [2024-06-27 19:26:54,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:54,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:54,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:54,389 INFO 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 19:26:54,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:54,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520266735] [2024-06-27 19:26:54,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520266735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:54,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:54,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:26:54,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554664640] [2024-06-27 19:26:54,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:54,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:26:54,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:54,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:26:54,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:26:54,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:54,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 356 transitions, 5775 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:54,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:54,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:54,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:55,366 INFO L124 PetriNetUnfolderBase]: 2893/4903 cut-off events. [2024-06-27 19:26:55,366 INFO L125 PetriNetUnfolderBase]: For 626159/626165 co-relation queries the response was YES. [2024-06-27 19:26:55,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38988 conditions, 4903 events. 2893/4903 cut-off events. For 626159/626165 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 32089 event pairs, 769 based on Foata normal form. 16/4912 useless extension candidates. Maximal degree in co-relation 38847. Up to 4035 conditions per place. [2024-06-27 19:26:55,428 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 280 selfloop transitions, 94 changer transitions 0/382 dead transitions. [2024-06-27 19:26:55,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 382 transitions, 6855 flow [2024-06-27 19:26:55,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:26:55,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:26:55,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:26:55,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-27 19:26:55,429 INFO L175 Difference]: Start difference. First operand has 292 places, 356 transitions, 5775 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:26:55,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 382 transitions, 6855 flow [2024-06-27 19:26:57,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 382 transitions, 6631 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 19:26:57,034 INFO L231 Difference]: Finished difference. Result has 295 places, 360 transitions, 5859 flow [2024-06-27 19:26:57,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5551, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5859, PETRI_PLACES=295, PETRI_TRANSITIONS=360} [2024-06-27 19:26:57,034 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 253 predicate places. [2024-06-27 19:26:57,034 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 360 transitions, 5859 flow [2024-06-27 19:26:57,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:57,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:57,034 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 19:26:57,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 19:26:57,035 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 19:26:57,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:57,035 INFO L85 PathProgramCache]: Analyzing trace with hash -2089090633, now seen corresponding path program 4 times [2024-06-27 19:26:57,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:57,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767707727] [2024-06-27 19:26:57,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:57,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:26:57,133 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 19:26:57,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:26:57,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767707727] [2024-06-27 19:26:57,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767707727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:26:57,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:26:57,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:26:57,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704972325] [2024-06-27 19:26:57,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:26:57,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:26:57,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:26:57,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:26:57,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:26:57,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:26:57,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 360 transitions, 5859 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:57,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:26:57,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:26:57,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:26:58,242 INFO L124 PetriNetUnfolderBase]: 2949/4983 cut-off events. [2024-06-27 19:26:58,242 INFO L125 PetriNetUnfolderBase]: For 657021/657021 co-relation queries the response was YES. [2024-06-27 19:26:58,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39752 conditions, 4983 events. 2949/4983 cut-off events. For 657021/657021 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 32707 event pairs, 792 based on Foata normal form. 16/4991 useless extension candidates. Maximal degree in co-relation 39609. Up to 4281 conditions per place. [2024-06-27 19:26:58,305 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 267 selfloop transitions, 108 changer transitions 0/383 dead transitions. [2024-06-27 19:26:58,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 383 transitions, 6728 flow [2024-06-27 19:26:58,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:26:58,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:26:58,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-27 19:26:58,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634146341463414 [2024-06-27 19:26:58,306 INFO L175 Difference]: Start difference. First operand has 295 places, 360 transitions, 5859 flow. Second operand 10 states and 231 transitions. [2024-06-27 19:26:58,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 383 transitions, 6728 flow [2024-06-27 19:26:59,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 383 transitions, 6573 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-27 19:26:59,963 INFO L231 Difference]: Finished difference. Result has 302 places, 362 transitions, 5987 flow [2024-06-27 19:26:59,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5704, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5987, PETRI_PLACES=302, PETRI_TRANSITIONS=362} [2024-06-27 19:26:59,963 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-27 19:26:59,963 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 362 transitions, 5987 flow [2024-06-27 19:26:59,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:26:59,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:26:59,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:26:59,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 19:26:59,964 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 19:26:59,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:26:59,964 INFO L85 PathProgramCache]: Analyzing trace with hash 844755913, now seen corresponding path program 5 times [2024-06-27 19:26:59,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:26:59,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377469564] [2024-06-27 19:26:59,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:26:59,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:26:59,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:00,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:00,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:00,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377469564] [2024-06-27 19:27:00,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377469564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:00,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:00,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:27:00,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138710062] [2024-06-27 19:27:00,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:00,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:27:00,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:00,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:27:00,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:27:00,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:00,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 362 transitions, 5987 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:00,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:00,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:00,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:01,043 INFO L124 PetriNetUnfolderBase]: 2992/5068 cut-off events. [2024-06-27 19:27:01,044 INFO L125 PetriNetUnfolderBase]: For 664710/664710 co-relation queries the response was YES. [2024-06-27 19:27:01,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40377 conditions, 5068 events. 2992/5068 cut-off events. For 664710/664710 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 33442 event pairs, 813 based on Foata normal form. 16/5076 useless extension candidates. Maximal degree in co-relation 40232. Up to 4350 conditions per place. [2024-06-27 19:27:01,103 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 273 selfloop transitions, 102 changer transitions 0/383 dead transitions. [2024-06-27 19:27:01,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 383 transitions, 6856 flow [2024-06-27 19:27:01,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:27:01,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:27:01,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:27:01,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-27 19:27:01,104 INFO L175 Difference]: Start difference. First operand has 302 places, 362 transitions, 5987 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:27:01,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 383 transitions, 6856 flow [2024-06-27 19:27:02,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 383 transitions, 6598 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-27 19:27:02,770 INFO L231 Difference]: Finished difference. Result has 302 places, 364 transitions, 6004 flow [2024-06-27 19:27:02,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5729, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6004, PETRI_PLACES=302, PETRI_TRANSITIONS=364} [2024-06-27 19:27:02,771 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-27 19:27:02,771 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 364 transitions, 6004 flow [2024-06-27 19:27:02,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:02,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:02,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:02,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 19:27:02,771 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 19:27:02,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:02,772 INFO L85 PathProgramCache]: Analyzing trace with hash 844608043, now seen corresponding path program 6 times [2024-06-27 19:27:02,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:02,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782308346] [2024-06-27 19:27:02,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:02,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:02,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:02,845 INFO 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 19:27:02,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:02,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782308346] [2024-06-27 19:27:02,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782308346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:02,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:02,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:27:02,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882943760] [2024-06-27 19:27:02,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:02,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:27:02,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:02,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:27:02,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:27:02,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:02,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 364 transitions, 6004 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:02,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:02,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:02,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:03,749 INFO L124 PetriNetUnfolderBase]: 3098/5236 cut-off events. [2024-06-27 19:27:03,749 INFO L125 PetriNetUnfolderBase]: For 704314/704314 co-relation queries the response was YES. [2024-06-27 19:27:03,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42468 conditions, 5236 events. 3098/5236 cut-off events. For 704314/704314 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 34778 event pairs, 818 based on Foata normal form. 12/5240 useless extension candidates. Maximal degree in co-relation 42322. Up to 4272 conditions per place. [2024-06-27 19:27:03,812 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 282 selfloop transitions, 101 changer transitions 0/391 dead transitions. [2024-06-27 19:27:03,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 391 transitions, 7130 flow [2024-06-27 19:27:03,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:27:03,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:27:03,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:27:03,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-27 19:27:03,813 INFO L175 Difference]: Start difference. First operand has 302 places, 364 transitions, 6004 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:27:03,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 391 transitions, 7130 flow [2024-06-27 19:27:05,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 391 transitions, 6909 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 19:27:05,481 INFO L231 Difference]: Finished difference. Result has 306 places, 368 transitions, 6130 flow [2024-06-27 19:27:05,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5783, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6130, PETRI_PLACES=306, PETRI_TRANSITIONS=368} [2024-06-27 19:27:05,482 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-27 19:27:05,482 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 368 transitions, 6130 flow [2024-06-27 19:27:05,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:05,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:05,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:05,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 19:27:05,482 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 19:27:05,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:05,482 INFO L85 PathProgramCache]: Analyzing trace with hash 850333495, now seen corresponding path program 1 times [2024-06-27 19:27:05,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:05,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651895973] [2024-06-27 19:27:05,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:05,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:05,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:05,560 INFO 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 19:27:05,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:05,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651895973] [2024-06-27 19:27:05,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651895973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:05,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:05,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:27:05,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803155340] [2024-06-27 19:27:05,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:05,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:27:05,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:05,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:27:05,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:27:05,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:05,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 368 transitions, 6130 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:05,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:05,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:05,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:06,497 INFO L124 PetriNetUnfolderBase]: 3105/5253 cut-off events. [2024-06-27 19:27:06,497 INFO L125 PetriNetUnfolderBase]: For 695344/695344 co-relation queries the response was YES. [2024-06-27 19:27:06,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42058 conditions, 5253 events. 3105/5253 cut-off events. For 695344/695344 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 34963 event pairs, 822 based on Foata normal form. 12/5257 useless extension candidates. Maximal degree in co-relation 41910. Up to 4405 conditions per place. [2024-06-27 19:27:06,559 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 271 selfloop transitions, 115 changer transitions 0/394 dead transitions. [2024-06-27 19:27:06,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 394 transitions, 7032 flow [2024-06-27 19:27:06,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:27:06,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:27:06,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-27 19:27:06,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5682926829268292 [2024-06-27 19:27:06,560 INFO L175 Difference]: Start difference. First operand has 306 places, 368 transitions, 6130 flow. Second operand 10 states and 233 transitions. [2024-06-27 19:27:06,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 394 transitions, 7032 flow [2024-06-27 19:27:08,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 394 transitions, 6901 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-27 19:27:08,241 INFO L231 Difference]: Finished difference. Result has 313 places, 370 transitions, 6296 flow [2024-06-27 19:27:08,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5999, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6296, PETRI_PLACES=313, PETRI_TRANSITIONS=370} [2024-06-27 19:27:08,242 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-27 19:27:08,242 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 370 transitions, 6296 flow [2024-06-27 19:27:08,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:08,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:08,243 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 19:27:08,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 19:27:08,243 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 19:27:08,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:08,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1982714711, now seen corresponding path program 7 times [2024-06-27 19:27:08,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:08,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481411605] [2024-06-27 19:27:08,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:08,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:08,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:08,318 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 19:27:08,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:08,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481411605] [2024-06-27 19:27:08,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481411605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:08,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:08,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:27:08,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281907964] [2024-06-27 19:27:08,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:08,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:27:08,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:08,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:27:08,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:27:08,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:08,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 370 transitions, 6296 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:08,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:08,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:08,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:09,223 INFO L124 PetriNetUnfolderBase]: 3237/5483 cut-off events. [2024-06-27 19:27:09,223 INFO L125 PetriNetUnfolderBase]: For 820619/820619 co-relation queries the response was YES. [2024-06-27 19:27:09,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43245 conditions, 5483 events. 3237/5483 cut-off events. For 820619/820619 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 36862 event pairs, 870 based on Foata normal form. 42/5519 useless extension candidates. Maximal degree in co-relation 43094. Up to 4615 conditions per place. [2024-06-27 19:27:09,290 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 286 selfloop transitions, 94 changer transitions 7/395 dead transitions. [2024-06-27 19:27:09,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 395 transitions, 7191 flow [2024-06-27 19:27:09,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:27:09,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:27:09,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 19:27:09,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-27 19:27:09,291 INFO L175 Difference]: Start difference. First operand has 313 places, 370 transitions, 6296 flow. Second operand 7 states and 179 transitions. [2024-06-27 19:27:09,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 395 transitions, 7191 flow [2024-06-27 19:27:11,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 395 transitions, 6910 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-27 19:27:11,149 INFO L231 Difference]: Finished difference. Result has 312 places, 367 transitions, 6161 flow [2024-06-27 19:27:11,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6015, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6161, PETRI_PLACES=312, PETRI_TRANSITIONS=367} [2024-06-27 19:27:11,149 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-27 19:27:11,149 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 367 transitions, 6161 flow [2024-06-27 19:27:11,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:11,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:11,149 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 19:27:11,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 19:27:11,149 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 19:27:11,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:11,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1988077091, now seen corresponding path program 8 times [2024-06-27 19:27:11,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:11,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372664374] [2024-06-27 19:27:11,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:11,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:11,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:11,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:11,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372664374] [2024-06-27 19:27:11,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372664374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:11,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:11,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:27:11,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549358402] [2024-06-27 19:27:11,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:11,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:27:11,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:11,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:27:11,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:27:11,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:11,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 367 transitions, 6161 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:11,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:11,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:11,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:12,162 INFO L124 PetriNetUnfolderBase]: 3179/5387 cut-off events. [2024-06-27 19:27:12,162 INFO L125 PetriNetUnfolderBase]: For 767700/767700 co-relation queries the response was YES. [2024-06-27 19:27:12,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40973 conditions, 5387 events. 3179/5387 cut-off events. For 767700/767700 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 36022 event pairs, 840 based on Foata normal form. 42/5423 useless extension candidates. Maximal degree in co-relation 40821. Up to 4538 conditions per place. [2024-06-27 19:27:12,228 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 280 selfloop transitions, 94 changer transitions 7/389 dead transitions. [2024-06-27 19:27:12,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 389 transitions, 7018 flow [2024-06-27 19:27:12,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:27:12,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:27:12,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 19:27:12,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-27 19:27:12,229 INFO L175 Difference]: Start difference. First operand has 312 places, 367 transitions, 6161 flow. Second operand 8 states and 197 transitions. [2024-06-27 19:27:12,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 389 transitions, 7018 flow [2024-06-27 19:27:14,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 389 transitions, 6808 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 19:27:14,149 INFO L231 Difference]: Finished difference. Result has 315 places, 363 transitions, 6092 flow [2024-06-27 19:27:14,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5951, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6092, PETRI_PLACES=315, PETRI_TRANSITIONS=363} [2024-06-27 19:27:14,149 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-27 19:27:14,150 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 363 transitions, 6092 flow [2024-06-27 19:27:14,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:14,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:14,150 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 19:27:14,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 19:27:14,150 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 19:27:14,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:14,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1982566841, now seen corresponding path program 9 times [2024-06-27 19:27:14,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:14,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451813657] [2024-06-27 19:27:14,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:14,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:14,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:14,241 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 19:27:14,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:14,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451813657] [2024-06-27 19:27:14,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451813657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:14,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:14,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:27:14,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136401502] [2024-06-27 19:27:14,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:14,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:27:14,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:14,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:27:14,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:27:14,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:14,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 363 transitions, 6092 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:14,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:14,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:14,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:15,189 INFO L124 PetriNetUnfolderBase]: 3176/5421 cut-off events. [2024-06-27 19:27:15,189 INFO L125 PetriNetUnfolderBase]: For 739126/739126 co-relation queries the response was YES. [2024-06-27 19:27:15,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40545 conditions, 5421 events. 3176/5421 cut-off events. For 739126/739126 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 36594 event pairs, 704 based on Foata normal form. 36/5451 useless extension candidates. Maximal degree in co-relation 40392. Up to 3981 conditions per place. [2024-06-27 19:27:15,256 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 289 selfloop transitions, 91 changer transitions 10/398 dead transitions. [2024-06-27 19:27:15,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 398 transitions, 7227 flow [2024-06-27 19:27:15,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:27:15,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:27:15,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-27 19:27:15,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6550522648083623 [2024-06-27 19:27:15,257 INFO L175 Difference]: Start difference. First operand has 315 places, 363 transitions, 6092 flow. Second operand 7 states and 188 transitions. [2024-06-27 19:27:15,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 398 transitions, 7227 flow [2024-06-27 19:27:17,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 398 transitions, 6897 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 19:27:17,540 INFO L231 Difference]: Finished difference. Result has 315 places, 358 transitions, 5855 flow [2024-06-27 19:27:17,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5762, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5855, PETRI_PLACES=315, PETRI_TRANSITIONS=358} [2024-06-27 19:27:17,540 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-27 19:27:17,540 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 358 transitions, 5855 flow [2024-06-27 19:27:17,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:17,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:17,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:17,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 19:27:17,541 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 19:27:17,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:17,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1377035033, now seen corresponding path program 2 times [2024-06-27 19:27:17,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:17,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639333026] [2024-06-27 19:27:17,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:17,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:17,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:17,609 INFO 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 19:27:17,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:17,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639333026] [2024-06-27 19:27:17,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639333026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:17,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:17,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:27:17,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736447579] [2024-06-27 19:27:17,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:17,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:27:17,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:17,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:27:17,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:27:17,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:17,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 358 transitions, 5855 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:17,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:17,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:17,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:18,498 INFO L124 PetriNetUnfolderBase]: 2925/4987 cut-off events. [2024-06-27 19:27:18,498 INFO L125 PetriNetUnfolderBase]: For 607598/607598 co-relation queries the response was YES. [2024-06-27 19:27:18,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35706 conditions, 4987 events. 2925/4987 cut-off events. For 607598/607598 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 33179 event pairs, 635 based on Foata normal form. 36/5017 useless extension candidates. Maximal degree in co-relation 35551. Up to 3800 conditions per place. [2024-06-27 19:27:18,559 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 269 selfloop transitions, 92 changer transitions 17/386 dead transitions. [2024-06-27 19:27:18,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 386 transitions, 6740 flow [2024-06-27 19:27:18,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:27:18,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:27:18,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 19:27:18,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-27 19:27:18,560 INFO L175 Difference]: Start difference. First operand has 315 places, 358 transitions, 5855 flow. Second operand 8 states and 202 transitions. [2024-06-27 19:27:18,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 386 transitions, 6740 flow [2024-06-27 19:27:20,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 386 transitions, 6254 flow, removed 55 selfloop flow, removed 9 redundant places. [2024-06-27 19:27:20,508 INFO L231 Difference]: Finished difference. Result has 314 places, 347 transitions, 5390 flow [2024-06-27 19:27:20,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5377, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5390, PETRI_PLACES=314, PETRI_TRANSITIONS=347} [2024-06-27 19:27:20,509 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-27 19:27:20,509 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 347 transitions, 5390 flow [2024-06-27 19:27:20,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:20,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:20,509 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] [2024-06-27 19:27:20,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 19:27:20,509 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 19:27:20,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:20,509 INFO L85 PathProgramCache]: Analyzing trace with hash -804980111, now seen corresponding path program 1 times [2024-06-27 19:27:20,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:20,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613565738] [2024-06-27 19:27:20,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:20,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:20,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:20,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:20,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613565738] [2024-06-27 19:27:20,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613565738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:20,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:20,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:27:20,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60189653] [2024-06-27 19:27:20,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:20,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:27:20,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:20,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:27:20,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:27:20,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:20,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 347 transitions, 5390 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:20,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:20,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:20,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:21,379 INFO L124 PetriNetUnfolderBase]: 2729/4666 cut-off events. [2024-06-27 19:27:21,379 INFO L125 PetriNetUnfolderBase]: For 469949/469949 co-relation queries the response was YES. [2024-06-27 19:27:21,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33214 conditions, 4666 events. 2729/4666 cut-off events. For 469949/469949 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30667 event pairs, 621 based on Foata normal form. 1/4664 useless extension candidates. Maximal degree in co-relation 33061. Up to 4180 conditions per place. [2024-06-27 19:27:21,438 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 335 selfloop transitions, 38 changer transitions 0/381 dead transitions. [2024-06-27 19:27:21,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 381 transitions, 6441 flow [2024-06-27 19:27:21,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:27:21,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:27:21,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:27:21,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-27 19:27:21,439 INFO L175 Difference]: Start difference. First operand has 314 places, 347 transitions, 5390 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:27:21,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 381 transitions, 6441 flow [2024-06-27 19:27:23,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 381 transitions, 6049 flow, removed 21 selfloop flow, removed 10 redundant places. [2024-06-27 19:27:23,190 INFO L231 Difference]: Finished difference. Result has 312 places, 350 transitions, 5129 flow [2024-06-27 19:27:23,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5000, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5129, PETRI_PLACES=312, PETRI_TRANSITIONS=350} [2024-06-27 19:27:23,191 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-27 19:27:23,191 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 350 transitions, 5129 flow [2024-06-27 19:27:23,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:23,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:23,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:23,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 19:27:23,192 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 19:27:23,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:23,192 INFO L85 PathProgramCache]: Analyzing trace with hash -814836179, now seen corresponding path program 1 times [2024-06-27 19:27:23,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:23,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188345728] [2024-06-27 19:27:23,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:23,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:23,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:23,270 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 19:27:23,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:23,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188345728] [2024-06-27 19:27:23,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188345728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:23,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:23,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:27:23,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612904269] [2024-06-27 19:27:23,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:23,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:27:23,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:23,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:27:23,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:27:23,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:23,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 350 transitions, 5129 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:23,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:23,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:23,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:24,007 INFO L124 PetriNetUnfolderBase]: 2742/4675 cut-off events. [2024-06-27 19:27:24,007 INFO L125 PetriNetUnfolderBase]: For 471806/471806 co-relation queries the response was YES. [2024-06-27 19:27:24,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32987 conditions, 4675 events. 2742/4675 cut-off events. For 471806/471806 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 30820 event pairs, 633 based on Foata normal form. 1/4670 useless extension candidates. Maximal degree in co-relation 32835. Up to 3956 conditions per place. [2024-06-27 19:27:24,064 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 244 selfloop transitions, 122 changer transitions 0/374 dead transitions. [2024-06-27 19:27:24,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 374 transitions, 6199 flow [2024-06-27 19:27:24,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:27:24,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:27:24,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 19:27:24,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-27 19:27:24,065 INFO L175 Difference]: Start difference. First operand has 312 places, 350 transitions, 5129 flow. Second operand 7 states and 178 transitions. [2024-06-27 19:27:24,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 374 transitions, 6199 flow [2024-06-27 19:27:25,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 374 transitions, 6103 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 19:27:25,741 INFO L231 Difference]: Finished difference. Result has 314 places, 356 transitions, 5491 flow [2024-06-27 19:27:25,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5033, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5491, PETRI_PLACES=314, PETRI_TRANSITIONS=356} [2024-06-27 19:27:25,742 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-27 19:27:25,742 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 356 transitions, 5491 flow [2024-06-27 19:27:25,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:25,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:25,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:25,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 19:27:25,742 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 19:27:25,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:25,742 INFO L85 PathProgramCache]: Analyzing trace with hash -804860141, now seen corresponding path program 2 times [2024-06-27 19:27:25,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:25,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62907565] [2024-06-27 19:27:25,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:25,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:25,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:25,829 INFO 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 19:27:25,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:25,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62907565] [2024-06-27 19:27:25,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62907565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:25,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:25,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:27:25,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690489299] [2024-06-27 19:27:25,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:25,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:27:25,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:25,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:27:25,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:27:25,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:25,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 356 transitions, 5491 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:25,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:25,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:25,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:26,642 INFO L124 PetriNetUnfolderBase]: 2739/4680 cut-off events. [2024-06-27 19:27:26,642 INFO L125 PetriNetUnfolderBase]: For 478569/478569 co-relation queries the response was YES. [2024-06-27 19:27:26,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33424 conditions, 4680 events. 2739/4680 cut-off events. For 478569/478569 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 30838 event pairs, 615 based on Foata normal form. 1/4678 useless extension candidates. Maximal degree in co-relation 33270. Up to 4195 conditions per place. [2024-06-27 19:27:26,699 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 341 selfloop transitions, 38 changer transitions 0/387 dead transitions. [2024-06-27 19:27:26,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 387 transitions, 6327 flow [2024-06-27 19:27:26,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:27:26,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:27:26,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-27 19:27:26,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2024-06-27 19:27:26,700 INFO L175 Difference]: Start difference. First operand has 314 places, 356 transitions, 5491 flow. Second operand 9 states and 215 transitions. [2024-06-27 19:27:26,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 387 transitions, 6327 flow [2024-06-27 19:27:28,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 387 transitions, 6107 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 19:27:28,209 INFO L231 Difference]: Finished difference. Result has 318 places, 356 transitions, 5353 flow [2024-06-27 19:27:28,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5271, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5353, PETRI_PLACES=318, PETRI_TRANSITIONS=356} [2024-06-27 19:27:28,209 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-27 19:27:28,210 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 356 transitions, 5353 flow [2024-06-27 19:27:28,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:28,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:28,210 INFO 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 19:27:28,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 19:27:28,210 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 19:27:28,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:28,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1348690093, now seen corresponding path program 3 times [2024-06-27 19:27:28,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:28,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175058290] [2024-06-27 19:27:28,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:28,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:28,271 INFO 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 19:27:28,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:28,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175058290] [2024-06-27 19:27:28,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175058290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:28,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:28,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:27:28,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666500670] [2024-06-27 19:27:28,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:28,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:27:28,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:28,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:27:28,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:27:28,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:28,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 356 transitions, 5353 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:28,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:28,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:28,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:29,045 INFO L124 PetriNetUnfolderBase]: 2816/4793 cut-off events. [2024-06-27 19:27:29,045 INFO L125 PetriNetUnfolderBase]: For 518960/518960 co-relation queries the response was YES. [2024-06-27 19:27:29,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35022 conditions, 4793 events. 2816/4793 cut-off events. For 518960/518960 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 31604 event pairs, 647 based on Foata normal form. 1/4779 useless extension candidates. Maximal degree in co-relation 34868. Up to 3812 conditions per place. [2024-06-27 19:27:29,105 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 200 selfloop transitions, 197 changer transitions 0/405 dead transitions. [2024-06-27 19:27:29,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 405 transitions, 7388 flow [2024-06-27 19:27:29,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:27:29,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:27:29,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-27 19:27:29,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6480836236933798 [2024-06-27 19:27:29,106 INFO L175 Difference]: Start difference. First operand has 318 places, 356 transitions, 5353 flow. Second operand 7 states and 186 transitions. [2024-06-27 19:27:29,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 405 transitions, 7388 flow [2024-06-27 19:27:30,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 405 transitions, 7300 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 19:27:30,761 INFO L231 Difference]: Finished difference. Result has 318 places, 378 transitions, 6112 flow [2024-06-27 19:27:30,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5265, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6112, PETRI_PLACES=318, PETRI_TRANSITIONS=378} [2024-06-27 19:27:30,762 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-27 19:27:30,762 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 378 transitions, 6112 flow [2024-06-27 19:27:30,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:30,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:30,762 INFO 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 19:27:30,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 19:27:30,763 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 19:27:30,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:30,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1338214573, now seen corresponding path program 4 times [2024-06-27 19:27:30,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:30,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640208312] [2024-06-27 19:27:30,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:30,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:30,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:30,835 INFO 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 19:27:30,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:30,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640208312] [2024-06-27 19:27:30,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640208312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:30,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:30,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:27:30,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078801689] [2024-06-27 19:27:30,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:30,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:27:30,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:30,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:27:30,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:27:30,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:30,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 378 transitions, 6112 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:30,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:30,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:30,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:31,625 INFO L124 PetriNetUnfolderBase]: 2829/4815 cut-off events. [2024-06-27 19:27:31,625 INFO L125 PetriNetUnfolderBase]: For 537231/537231 co-relation queries the response was YES. [2024-06-27 19:27:31,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35921 conditions, 4815 events. 2829/4815 cut-off events. For 537231/537231 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 31818 event pairs, 647 based on Foata normal form. 1/4801 useless extension candidates. Maximal degree in co-relation 35766. Up to 3822 conditions per place. [2024-06-27 19:27:31,686 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 199 selfloop transitions, 201 changer transitions 0/408 dead transitions. [2024-06-27 19:27:31,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 408 transitions, 7850 flow [2024-06-27 19:27:31,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:27:31,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:27:31,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 19:27:31,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-27 19:27:31,686 INFO L175 Difference]: Start difference. First operand has 318 places, 378 transitions, 6112 flow. Second operand 7 states and 182 transitions. [2024-06-27 19:27:31,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 408 transitions, 7850 flow [2024-06-27 19:27:33,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 408 transitions, 7455 flow, removed 93 selfloop flow, removed 2 redundant places. [2024-06-27 19:27:33,492 INFO L231 Difference]: Finished difference. Result has 323 places, 384 transitions, 6269 flow [2024-06-27 19:27:33,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5755, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6269, PETRI_PLACES=323, PETRI_TRANSITIONS=384} [2024-06-27 19:27:33,493 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2024-06-27 19:27:33,493 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 384 transitions, 6269 flow [2024-06-27 19:27:33,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:33,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:33,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:33,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 19:27:33,493 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 19:27:33,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:33,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1547991883, now seen corresponding path program 5 times [2024-06-27 19:27:33,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:33,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818503808] [2024-06-27 19:27:33,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:33,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:33,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:33,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:33,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:33,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818503808] [2024-06-27 19:27:33,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818503808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:33,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:33,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:27:33,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113555484] [2024-06-27 19:27:33,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:33,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:27:33,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:33,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:27:33,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:27:33,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:33,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 384 transitions, 6269 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:33,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:33,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:33,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:34,433 INFO L124 PetriNetUnfolderBase]: 2858/4861 cut-off events. [2024-06-27 19:27:34,433 INFO L125 PetriNetUnfolderBase]: For 562743/562743 co-relation queries the response was YES. [2024-06-27 19:27:34,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36568 conditions, 4861 events. 2858/4861 cut-off events. For 562743/562743 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 32149 event pairs, 647 based on Foata normal form. 1/4847 useless extension candidates. Maximal degree in co-relation 36412. Up to 3847 conditions per place. [2024-06-27 19:27:34,500 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 209 selfloop transitions, 207 changer transitions 0/424 dead transitions. [2024-06-27 19:27:34,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 424 transitions, 7970 flow [2024-06-27 19:27:34,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:27:34,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:27:34,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-27 19:27:34,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6371951219512195 [2024-06-27 19:27:34,501 INFO L175 Difference]: Start difference. First operand has 323 places, 384 transitions, 6269 flow. Second operand 8 states and 209 transitions. [2024-06-27 19:27:34,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 424 transitions, 7970 flow [2024-06-27 19:27:36,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 424 transitions, 7568 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-27 19:27:36,282 INFO L231 Difference]: Finished difference. Result has 328 places, 394 transitions, 6524 flow [2024-06-27 19:27:36,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5907, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6524, PETRI_PLACES=328, PETRI_TRANSITIONS=394} [2024-06-27 19:27:36,282 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-27 19:27:36,282 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 394 transitions, 6524 flow [2024-06-27 19:27:36,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:36,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:36,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:36,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 19:27:36,283 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 19:27:36,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:36,283 INFO L85 PathProgramCache]: Analyzing trace with hash 71949953, now seen corresponding path program 2 times [2024-06-27 19:27:36,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:36,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807607023] [2024-06-27 19:27:36,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:36,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:36,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:36,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:36,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:36,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807607023] [2024-06-27 19:27:36,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807607023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:36,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:36,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:27:36,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116137668] [2024-06-27 19:27:36,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:36,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:27:36,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:36,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:27:36,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:27:36,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:36,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 394 transitions, 6524 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:36,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:36,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:36,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:37,142 INFO L124 PetriNetUnfolderBase]: 2863/4843 cut-off events. [2024-06-27 19:27:37,142 INFO L125 PetriNetUnfolderBase]: For 577161/577161 co-relation queries the response was YES. [2024-06-27 19:27:37,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36724 conditions, 4843 events. 2863/4843 cut-off events. For 577161/577161 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 31905 event pairs, 718 based on Foata normal form. 1/4828 useless extension candidates. Maximal degree in co-relation 36567. Up to 3851 conditions per place. [2024-06-27 19:27:37,351 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 228 selfloop transitions, 180 changer transitions 0/416 dead transitions. [2024-06-27 19:27:37,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 416 transitions, 7840 flow [2024-06-27 19:27:37,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:27:37,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:27:37,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:27:37,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-27 19:27:37,352 INFO L175 Difference]: Start difference. First operand has 328 places, 394 transitions, 6524 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:27:37,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 416 transitions, 7840 flow [2024-06-27 19:27:39,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 416 transitions, 7346 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-27 19:27:39,558 INFO L231 Difference]: Finished difference. Result has 330 places, 397 transitions, 6475 flow [2024-06-27 19:27:39,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6034, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6475, PETRI_PLACES=330, PETRI_TRANSITIONS=397} [2024-06-27 19:27:39,559 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 288 predicate places. [2024-06-27 19:27:39,559 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 397 transitions, 6475 flow [2024-06-27 19:27:39,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:39,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:39,559 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] [2024-06-27 19:27:39,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 19:27:39,559 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 19:27:39,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:39,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1261062725, now seen corresponding path program 6 times [2024-06-27 19:27:39,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:39,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095561321] [2024-06-27 19:27:39,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:39,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:39,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:39,637 INFO 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 19:27:39,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:39,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095561321] [2024-06-27 19:27:39,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095561321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:39,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:39,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:27:39,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769659687] [2024-06-27 19:27:39,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:39,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:27:39,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:39,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:27:39,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:27:39,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:39,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 397 transitions, 6475 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:39,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:39,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:39,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:40,647 INFO L124 PetriNetUnfolderBase]: 2868/4875 cut-off events. [2024-06-27 19:27:40,648 INFO L125 PetriNetUnfolderBase]: For 585759/585759 co-relation queries the response was YES. [2024-06-27 19:27:40,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36753 conditions, 4875 events. 2868/4875 cut-off events. For 585759/585759 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 32196 event pairs, 646 based on Foata normal form. 1/4861 useless extension candidates. Maximal degree in co-relation 36595. Up to 3855 conditions per place. [2024-06-27 19:27:40,713 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 206 selfloop transitions, 212 changer transitions 0/426 dead transitions. [2024-06-27 19:27:40,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 426 transitions, 7803 flow [2024-06-27 19:27:40,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:27:40,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:27:40,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 19:27:40,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-27 19:27:40,714 INFO L175 Difference]: Start difference. First operand has 330 places, 397 transitions, 6475 flow. Second operand 8 states and 203 transitions. [2024-06-27 19:27:40,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 426 transitions, 7803 flow [2024-06-27 19:27:42,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 426 transitions, 7412 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-27 19:27:42,949 INFO L231 Difference]: Finished difference. Result has 334 places, 400 transitions, 6562 flow [2024-06-27 19:27:42,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6088, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6562, PETRI_PLACES=334, PETRI_TRANSITIONS=400} [2024-06-27 19:27:42,949 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-27 19:27:42,949 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 400 transitions, 6562 flow [2024-06-27 19:27:42,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:42,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:42,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:42,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 19:27:42,950 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 19:27:42,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:42,951 INFO L85 PathProgramCache]: Analyzing trace with hash 220466291, now seen corresponding path program 3 times [2024-06-27 19:27:42,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:42,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118933843] [2024-06-27 19:27:42,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:42,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:42,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:43,018 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 19:27:43,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:43,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118933843] [2024-06-27 19:27:43,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118933843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:43,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:43,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:27:43,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915516788] [2024-06-27 19:27:43,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:43,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:27:43,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:43,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:27:43,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:27:43,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:43,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 400 transitions, 6562 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:43,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:43,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:43,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:43,847 INFO L124 PetriNetUnfolderBase]: 2873/4860 cut-off events. [2024-06-27 19:27:43,847 INFO L125 PetriNetUnfolderBase]: For 599376/599376 co-relation queries the response was YES. [2024-06-27 19:27:43,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36934 conditions, 4860 events. 2873/4860 cut-off events. For 599376/599376 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 32098 event pairs, 719 based on Foata normal form. 1/4845 useless extension candidates. Maximal degree in co-relation 36775. Up to 3859 conditions per place. [2024-06-27 19:27:43,911 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 224 selfloop transitions, 188 changer transitions 0/420 dead transitions. [2024-06-27 19:27:43,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 420 transitions, 8075 flow [2024-06-27 19:27:43,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:27:43,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:27:43,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 19:27:43,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-27 19:27:43,912 INFO L175 Difference]: Start difference. First operand has 334 places, 400 transitions, 6562 flow. Second operand 7 states and 174 transitions. [2024-06-27 19:27:43,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 420 transitions, 8075 flow [2024-06-27 19:27:46,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 420 transitions, 7777 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 19:27:46,334 INFO L231 Difference]: Finished difference. Result has 336 places, 403 transitions, 6719 flow [2024-06-27 19:27:46,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6268, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6719, PETRI_PLACES=336, PETRI_TRANSITIONS=403} [2024-06-27 19:27:46,334 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 294 predicate places. [2024-06-27 19:27:46,335 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 403 transitions, 6719 flow [2024-06-27 19:27:46,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:46,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:46,335 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] [2024-06-27 19:27:46,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 19:27:46,335 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 19:27:46,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:46,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1817601259, now seen corresponding path program 7 times [2024-06-27 19:27:46,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:46,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336432078] [2024-06-27 19:27:46,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:46,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:46,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:46,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:46,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336432078] [2024-06-27 19:27:46,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336432078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:46,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:46,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:27:46,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571722952] [2024-06-27 19:27:46,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:46,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:27:46,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:46,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:27:46,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:27:46,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:46,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 403 transitions, 6719 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:46,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:46,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:46,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:47,276 INFO L124 PetriNetUnfolderBase]: 2878/4888 cut-off events. [2024-06-27 19:27:47,276 INFO L125 PetriNetUnfolderBase]: For 611976/611976 co-relation queries the response was YES. [2024-06-27 19:27:47,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37142 conditions, 4888 events. 2878/4888 cut-off events. For 611976/611976 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 32273 event pairs, 645 based on Foata normal form. 1/4873 useless extension candidates. Maximal degree in co-relation 36982. Up to 3863 conditions per place. [2024-06-27 19:27:47,340 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 206 selfloop transitions, 216 changer transitions 0/430 dead transitions. [2024-06-27 19:27:47,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 430 transitions, 8254 flow [2024-06-27 19:27:47,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:27:47,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:27:47,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-27 19:27:47,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-27 19:27:47,341 INFO L175 Difference]: Start difference. First operand has 336 places, 403 transitions, 6719 flow. Second operand 8 states and 201 transitions. [2024-06-27 19:27:47,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 430 transitions, 8254 flow [2024-06-27 19:27:49,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 430 transitions, 7682 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-27 19:27:49,632 INFO L231 Difference]: Finished difference. Result has 337 places, 406 transitions, 6636 flow [2024-06-27 19:27:49,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6151, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6636, PETRI_PLACES=337, PETRI_TRANSITIONS=406} [2024-06-27 19:27:49,632 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 295 predicate places. [2024-06-27 19:27:49,633 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 406 transitions, 6636 flow [2024-06-27 19:27:49,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:49,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:49,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:27:49,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 19:27:49,633 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 19:27:49,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:49,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1410285219, now seen corresponding path program 4 times [2024-06-27 19:27:49,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:49,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836352768] [2024-06-27 19:27:49,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:49,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:49,692 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 19:27:49,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:49,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836352768] [2024-06-27 19:27:49,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836352768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:49,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:49,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:27:49,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869534402] [2024-06-27 19:27:49,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:49,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:27:49,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:49,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:27:49,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:27:49,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:49,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 406 transitions, 6636 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:49,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:49,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:49,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:50,518 INFO L124 PetriNetUnfolderBase]: 2875/4869 cut-off events. [2024-06-27 19:27:50,518 INFO L125 PetriNetUnfolderBase]: For 618878/618878 co-relation queries the response was YES. [2024-06-27 19:27:50,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37029 conditions, 4869 events. 2875/4869 cut-off events. For 618878/618878 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 32184 event pairs, 726 based on Foata normal form. 1/4854 useless extension candidates. Maximal degree in co-relation 36868. Up to 3861 conditions per place. [2024-06-27 19:27:50,582 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 229 selfloop transitions, 185 changer transitions 0/422 dead transitions. [2024-06-27 19:27:50,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 422 transitions, 7894 flow [2024-06-27 19:27:50,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:27:50,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:27:50,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:27:50,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-27 19:27:50,583 INFO L175 Difference]: Start difference. First operand has 337 places, 406 transitions, 6636 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:27:50,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 422 transitions, 7894 flow [2024-06-27 19:27:53,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 422 transitions, 7545 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-27 19:27:53,062 INFO L231 Difference]: Finished difference. Result has 340 places, 406 transitions, 6665 flow [2024-06-27 19:27:53,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6287, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6665, PETRI_PLACES=340, PETRI_TRANSITIONS=406} [2024-06-27 19:27:53,062 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-27 19:27:53,062 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 406 transitions, 6665 flow [2024-06-27 19:27:53,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:53,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:53,062 INFO 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 19:27:53,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 19:27:53,063 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 19:27:53,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:53,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1547950055, now seen corresponding path program 8 times [2024-06-27 19:27:53,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:53,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340181120] [2024-06-27 19:27:53,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:53,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:53,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:53,140 INFO 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 19:27:53,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:53,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340181120] [2024-06-27 19:27:53,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340181120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:53,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:53,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:27:53,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575647590] [2024-06-27 19:27:53,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:53,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:27:53,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:53,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:27:53,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:27:53,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:53,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 406 transitions, 6665 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:53,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:53,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:53,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:54,011 INFO L124 PetriNetUnfolderBase]: 2872/4892 cut-off events. [2024-06-27 19:27:54,011 INFO L125 PetriNetUnfolderBase]: For 625300/625300 co-relation queries the response was YES. [2024-06-27 19:27:54,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37013 conditions, 4892 events. 2872/4892 cut-off events. For 625300/625300 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 32337 event pairs, 655 based on Foata normal form. 1/4877 useless extension candidates. Maximal degree in co-relation 36851. Up to 3859 conditions per place. [2024-06-27 19:27:54,075 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 205 selfloop transitions, 216 changer transitions 0/429 dead transitions. [2024-06-27 19:27:54,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 429 transitions, 7959 flow [2024-06-27 19:27:54,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:27:54,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:27:54,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 19:27:54,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-27 19:27:54,076 INFO L175 Difference]: Start difference. First operand has 340 places, 406 transitions, 6665 flow. Second operand 8 states and 199 transitions. [2024-06-27 19:27:54,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 429 transitions, 7959 flow [2024-06-27 19:27:56,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 429 transitions, 7560 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 19:27:56,301 INFO L231 Difference]: Finished difference. Result has 342 places, 406 transitions, 6704 flow [2024-06-27 19:27:56,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6266, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6704, PETRI_PLACES=342, PETRI_TRANSITIONS=406} [2024-06-27 19:27:56,301 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 300 predicate places. [2024-06-27 19:27:56,301 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 406 transitions, 6704 flow [2024-06-27 19:27:56,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:56,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:56,301 INFO 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 19:27:56,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 19:27:56,302 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 19:27:56,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:56,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1408063851, now seen corresponding path program 5 times [2024-06-27 19:27:56,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:56,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385412802] [2024-06-27 19:27:56,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:56,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:56,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:56,372 INFO 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 19:27:56,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:56,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385412802] [2024-06-27 19:27:56,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385412802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:56,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:56,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:27:56,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404532510] [2024-06-27 19:27:56,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:56,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:27:56,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:56,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:27:56,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:27:56,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:56,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 406 transitions, 6704 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:56,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:56,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:56,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:27:57,200 INFO L124 PetriNetUnfolderBase]: 2877/4902 cut-off events. [2024-06-27 19:27:57,200 INFO L125 PetriNetUnfolderBase]: For 637719/637719 co-relation queries the response was YES. [2024-06-27 19:27:57,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37237 conditions, 4902 events. 2877/4902 cut-off events. For 637719/637719 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 32598 event pairs, 638 based on Foata normal form. 1/4897 useless extension candidates. Maximal degree in co-relation 37074. Up to 4105 conditions per place. [2024-06-27 19:27:57,263 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 301 selfloop transitions, 117 changer transitions 0/426 dead transitions. [2024-06-27 19:27:57,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 426 transitions, 8047 flow [2024-06-27 19:27:57,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:27:57,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:27:57,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:27:57,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-27 19:27:57,264 INFO L175 Difference]: Start difference. First operand has 342 places, 406 transitions, 6704 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:27:57,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 426 transitions, 8047 flow [2024-06-27 19:27:59,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 426 transitions, 7448 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 19:27:59,743 INFO L231 Difference]: Finished difference. Result has 342 places, 409 transitions, 6414 flow [2024-06-27 19:27:59,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6109, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6414, PETRI_PLACES=342, PETRI_TRANSITIONS=409} [2024-06-27 19:27:59,744 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 300 predicate places. [2024-06-27 19:27:59,744 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 409 transitions, 6414 flow [2024-06-27 19:27:59,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:59,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:27:59,744 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] [2024-06-27 19:27:59,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 19:27:59,745 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 19:27:59,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:27:59,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1383232381, now seen corresponding path program 6 times [2024-06-27 19:27:59,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:27:59,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721994551] [2024-06-27 19:27:59,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:27:59,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:27:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:27:59,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:27:59,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:27:59,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721994551] [2024-06-27 19:27:59,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721994551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:27:59,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:27:59,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:27:59,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523144884] [2024-06-27 19:27:59,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:27:59,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:27:59,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:27:59,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:27:59,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:27:59,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:27:59,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 409 transitions, 6414 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:27:59,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:27:59,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:27:59,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:00,649 INFO L124 PetriNetUnfolderBase]: 2882/4923 cut-off events. [2024-06-27 19:28:00,649 INFO L125 PetriNetUnfolderBase]: For 644848/644848 co-relation queries the response was YES. [2024-06-27 19:28:00,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37082 conditions, 4923 events. 2882/4923 cut-off events. For 644848/644848 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 32854 event pairs, 650 based on Foata normal form. 1/4918 useless extension candidates. Maximal degree in co-relation 36918. Up to 4109 conditions per place. [2024-06-27 19:28:00,713 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 305 selfloop transitions, 118 changer transitions 0/431 dead transitions. [2024-06-27 19:28:00,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 431 transitions, 7779 flow [2024-06-27 19:28:00,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:28:00,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:28:00,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 19:28:00,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-27 19:28:00,714 INFO L175 Difference]: Start difference. First operand has 342 places, 409 transitions, 6414 flow. Second operand 7 states and 176 transitions. [2024-06-27 19:28:00,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 431 transitions, 7779 flow [2024-06-27 19:28:03,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 431 transitions, 7488 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 19:28:03,174 INFO L231 Difference]: Finished difference. Result has 343 places, 412 transitions, 6434 flow [2024-06-27 19:28:03,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6129, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6434, PETRI_PLACES=343, PETRI_TRANSITIONS=412} [2024-06-27 19:28:03,175 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2024-06-27 19:28:03,175 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 412 transitions, 6434 flow [2024-06-27 19:28:03,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:03,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:03,175 INFO 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 19:28:03,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 19:28:03,176 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 19:28:03,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:03,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1343975759, now seen corresponding path program 9 times [2024-06-27 19:28:03,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:03,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269565800] [2024-06-27 19:28:03,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:03,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:03,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:03,254 INFO 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 19:28:03,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:03,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269565800] [2024-06-27 19:28:03,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269565800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:03,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:03,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:28:03,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326682540] [2024-06-27 19:28:03,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:03,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:28:03,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:03,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:28:03,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:28:03,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:28:03,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 412 transitions, 6434 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:03,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:03,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:28:03,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:04,140 INFO L124 PetriNetUnfolderBase]: 2879/4916 cut-off events. [2024-06-27 19:28:04,140 INFO L125 PetriNetUnfolderBase]: For 650424/650424 co-relation queries the response was YES. [2024-06-27 19:28:04,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37048 conditions, 4916 events. 2879/4916 cut-off events. For 650424/650424 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 32675 event pairs, 620 based on Foata normal form. 1/4914 useless extension candidates. Maximal degree in co-relation 36883. Up to 4406 conditions per place. [2024-06-27 19:28:04,206 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 387 selfloop transitions, 37 changer transitions 0/432 dead transitions. [2024-06-27 19:28:04,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 432 transitions, 7545 flow [2024-06-27 19:28:04,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:28:04,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:28:04,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-27 19:28:04,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-27 19:28:04,207 INFO L175 Difference]: Start difference. First operand has 343 places, 412 transitions, 6434 flow. Second operand 8 states and 188 transitions. [2024-06-27 19:28:04,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 432 transitions, 7545 flow [2024-06-27 19:28:06,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 432 transitions, 7287 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 19:28:06,862 INFO L231 Difference]: Finished difference. Result has 346 places, 412 transitions, 6256 flow [2024-06-27 19:28:06,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6176, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6256, PETRI_PLACES=346, PETRI_TRANSITIONS=412} [2024-06-27 19:28:06,863 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-27 19:28:06,863 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 412 transitions, 6256 flow [2024-06-27 19:28:06,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:06,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:06,863 INFO 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 19:28:06,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 19:28:06,864 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 19:28:06,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:06,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1057491659, now seen corresponding path program 10 times [2024-06-27 19:28:06,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:06,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48836381] [2024-06-27 19:28:06,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:06,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:06,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:06,971 INFO 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 19:28:06,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:06,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48836381] [2024-06-27 19:28:06,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48836381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:06,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:06,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:28:06,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684084350] [2024-06-27 19:28:06,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:06,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:28:06,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:06,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:28:06,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:28:07,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:28:07,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 412 transitions, 6256 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:07,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:07,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:28:07,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:07,887 INFO L124 PetriNetUnfolderBase]: 2876/4912 cut-off events. [2024-06-27 19:28:07,887 INFO L125 PetriNetUnfolderBase]: For 655751/655751 co-relation queries the response was YES. [2024-06-27 19:28:07,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36709 conditions, 4912 events. 2876/4912 cut-off events. For 655751/655751 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 32645 event pairs, 620 based on Foata normal form. 1/4910 useless extension candidates. Maximal degree in co-relation 36544. Up to 4403 conditions per place. [2024-06-27 19:28:07,953 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 387 selfloop transitions, 37 changer transitions 0/432 dead transitions. [2024-06-27 19:28:07,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 432 transitions, 7163 flow [2024-06-27 19:28:07,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:28:07,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:28:07,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-27 19:28:07,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-06-27 19:28:07,954 INFO L175 Difference]: Start difference. First operand has 346 places, 412 transitions, 6256 flow. Second operand 9 states and 206 transitions. [2024-06-27 19:28:07,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 432 transitions, 7163 flow [2024-06-27 19:28:10,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 432 transitions, 7085 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 19:28:10,731 INFO L231 Difference]: Finished difference. Result has 350 places, 412 transitions, 6258 flow [2024-06-27 19:28:10,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6178, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6258, PETRI_PLACES=350, PETRI_TRANSITIONS=412} [2024-06-27 19:28:10,731 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-06-27 19:28:10,732 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 412 transitions, 6258 flow [2024-06-27 19:28:10,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:10,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:10,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:28:10,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 19:28:10,732 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 19:28:10,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:10,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1182353331, now seen corresponding path program 7 times [2024-06-27 19:28:10,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:10,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237597476] [2024-06-27 19:28:10,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:10,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:10,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:28:10,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:10,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237597476] [2024-06-27 19:28:10,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237597476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:10,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:10,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:28:10,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104028737] [2024-06-27 19:28:10,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:10,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:28:10,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:10,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:28:10,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:28:10,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:28:10,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 412 transitions, 6258 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:10,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:10,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:28:10,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:11,651 INFO L124 PetriNetUnfolderBase]: 2873/4899 cut-off events. [2024-06-27 19:28:11,651 INFO L125 PetriNetUnfolderBase]: For 663085/663085 co-relation queries the response was YES. [2024-06-27 19:28:11,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36678 conditions, 4899 events. 2873/4899 cut-off events. For 663085/663085 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 32604 event pairs, 640 based on Foata normal form. 1/4894 useless extension candidates. Maximal degree in co-relation 36512. Up to 4103 conditions per place. [2024-06-27 19:28:11,716 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 306 selfloop transitions, 119 changer transitions 0/433 dead transitions. [2024-06-27 19:28:11,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 433 transitions, 7368 flow [2024-06-27 19:28:11,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:28:11,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:28:11,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 19:28:11,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-27 19:28:11,717 INFO L175 Difference]: Start difference. First operand has 350 places, 412 transitions, 6258 flow. Second operand 7 states and 178 transitions. [2024-06-27 19:28:11,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 433 transitions, 7368 flow [2024-06-27 19:28:14,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 433 transitions, 7246 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-27 19:28:14,557 INFO L231 Difference]: Finished difference. Result has 348 places, 412 transitions, 6382 flow [2024-06-27 19:28:14,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6136, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6382, PETRI_PLACES=348, PETRI_TRANSITIONS=412} [2024-06-27 19:28:14,558 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-27 19:28:14,558 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 412 transitions, 6382 flow [2024-06-27 19:28:14,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:14,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:14,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:28:14,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 19:28:14,558 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 19:28:14,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:14,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1241823505, now seen corresponding path program 1 times [2024-06-27 19:28:14,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:14,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807951678] [2024-06-27 19:28:14,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:14,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:14,626 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 19:28:14,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:14,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807951678] [2024-06-27 19:28:14,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807951678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:14,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:14,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:28:14,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117269061] [2024-06-27 19:28:14,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:14,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:28:14,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:14,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:28:14,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:28:14,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:28:14,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 412 transitions, 6382 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:14,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:14,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:28:14,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:15,505 INFO L124 PetriNetUnfolderBase]: 2893/4935 cut-off events. [2024-06-27 19:28:15,505 INFO L125 PetriNetUnfolderBase]: For 704180/704180 co-relation queries the response was YES. [2024-06-27 19:28:15,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37210 conditions, 4935 events. 2893/4935 cut-off events. For 704180/704180 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 32913 event pairs, 514 based on Foata normal form. 6/4935 useless extension candidates. Maximal degree in co-relation 37043. Up to 4222 conditions per place. [2024-06-27 19:28:15,570 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 403 selfloop transitions, 25 changer transitions 0/436 dead transitions. [2024-06-27 19:28:15,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 436 transitions, 7563 flow [2024-06-27 19:28:15,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:28:15,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:28:15,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 19:28:15,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-27 19:28:15,571 INFO L175 Difference]: Start difference. First operand has 348 places, 412 transitions, 6382 flow. Second operand 6 states and 149 transitions. [2024-06-27 19:28:15,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 436 transitions, 7563 flow [2024-06-27 19:28:17,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 436 transitions, 7270 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 19:28:17,841 INFO L231 Difference]: Finished difference. Result has 347 places, 413 transitions, 6156 flow [2024-06-27 19:28:17,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6089, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6156, PETRI_PLACES=347, PETRI_TRANSITIONS=413} [2024-06-27 19:28:17,841 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-27 19:28:17,841 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 413 transitions, 6156 flow [2024-06-27 19:28:17,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:17,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:17,842 INFO 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 19:28:17,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 19:28:17,842 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 19:28:17,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:17,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1683607861, now seen corresponding path program 2 times [2024-06-27 19:28:17,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:17,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110397749] [2024-06-27 19:28:17,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:17,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:17,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:28:17,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:17,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110397749] [2024-06-27 19:28:17,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110397749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:17,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:17,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:28:17,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502513029] [2024-06-27 19:28:17,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:17,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:28:17,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:17,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:28:17,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:28:17,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:28:17,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 413 transitions, 6156 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:17,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:17,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:28:17,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:18,763 INFO L124 PetriNetUnfolderBase]: 2880/4916 cut-off events. [2024-06-27 19:28:18,763 INFO L125 PetriNetUnfolderBase]: For 681157/681157 co-relation queries the response was YES. [2024-06-27 19:28:18,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36338 conditions, 4916 events. 2880/4916 cut-off events. For 681157/681157 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 32763 event pairs, 503 based on Foata normal form. 6/4916 useless extension candidates. Maximal degree in co-relation 36170. Up to 4216 conditions per place. [2024-06-27 19:28:18,829 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 399 selfloop transitions, 25 changer transitions 1/433 dead transitions. [2024-06-27 19:28:18,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 433 transitions, 7102 flow [2024-06-27 19:28:18,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:28:18,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:28:18,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-27 19:28:18,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-27 19:28:18,830 INFO L175 Difference]: Start difference. First operand has 347 places, 413 transitions, 6156 flow. Second operand 5 states and 129 transitions. [2024-06-27 19:28:18,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 433 transitions, 7102 flow [2024-06-27 19:28:21,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 433 transitions, 7030 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 19:28:21,873 INFO L231 Difference]: Finished difference. Result has 349 places, 413 transitions, 6140 flow [2024-06-27 19:28:21,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6084, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6140, PETRI_PLACES=349, PETRI_TRANSITIONS=413} [2024-06-27 19:28:21,873 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 307 predicate places. [2024-06-27 19:28:21,873 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 413 transitions, 6140 flow [2024-06-27 19:28:21,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:21,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:21,874 INFO 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 19:28:21,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 19:28:21,874 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 19:28:21,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:21,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1112373681, now seen corresponding path program 1 times [2024-06-27 19:28:21,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:21,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288526978] [2024-06-27 19:28:21,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:21,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:21,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:21,948 INFO 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 19:28:21,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:21,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288526978] [2024-06-27 19:28:21,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288526978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:21,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:21,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:28:21,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732669959] [2024-06-27 19:28:21,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:21,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:28:21,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:21,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:28:21,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:28:21,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:28:21,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 413 transitions, 6140 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:21,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:21,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:28:21,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:22,892 INFO L124 PetriNetUnfolderBase]: 3019/5113 cut-off events. [2024-06-27 19:28:22,893 INFO L125 PetriNetUnfolderBase]: For 801122/801122 co-relation queries the response was YES. [2024-06-27 19:28:22,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40270 conditions, 5113 events. 3019/5113 cut-off events. For 801122/801122 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 33954 event pairs, 659 based on Foata normal form. 2/5093 useless extension candidates. Maximal degree in co-relation 40102. Up to 4276 conditions per place. [2024-06-27 19:28:22,958 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 318 selfloop transitions, 124 changer transitions 0/450 dead transitions. [2024-06-27 19:28:22,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 450 transitions, 7494 flow [2024-06-27 19:28:22,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:28:22,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:28:22,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 19:28:22,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-27 19:28:22,959 INFO L175 Difference]: Start difference. First operand has 349 places, 413 transitions, 6140 flow. Second operand 7 states and 182 transitions. [2024-06-27 19:28:22,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 450 transitions, 7494 flow [2024-06-27 19:28:25,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 450 transitions, 7423 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 19:28:25,705 INFO L231 Difference]: Finished difference. Result has 352 places, 421 transitions, 6529 flow [2024-06-27 19:28:25,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6071, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6529, PETRI_PLACES=352, PETRI_TRANSITIONS=421} [2024-06-27 19:28:25,705 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-27 19:28:25,705 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 421 transitions, 6529 flow [2024-06-27 19:28:25,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:25,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:25,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:28:25,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 19:28:25,706 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 19:28:25,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:25,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1338206637, now seen corresponding path program 2 times [2024-06-27 19:28:25,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:25,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716996528] [2024-06-27 19:28:25,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:25,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:25,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:25,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:28:25,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:25,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716996528] [2024-06-27 19:28:25,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716996528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:25,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:25,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:28:25,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359767757] [2024-06-27 19:28:25,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:25,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:28:25,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:25,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:28:25,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:28:25,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:28:25,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 421 transitions, 6529 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:25,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:25,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:28:25,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:26,657 INFO L124 PetriNetUnfolderBase]: 3014/5120 cut-off events. [2024-06-27 19:28:26,657 INFO L125 PetriNetUnfolderBase]: For 791597/791597 co-relation queries the response was YES. [2024-06-27 19:28:26,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40469 conditions, 5120 events. 3014/5120 cut-off events. For 791597/791597 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 34142 event pairs, 674 based on Foata normal form. 2/5109 useless extension candidates. Maximal degree in co-relation 40300. Up to 4422 conditions per place. [2024-06-27 19:28:26,727 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 317 selfloop transitions, 117 changer transitions 0/442 dead transitions. [2024-06-27 19:28:26,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 442 transitions, 7449 flow [2024-06-27 19:28:26,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:28:26,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:28:26,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 19:28:26,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-27 19:28:26,728 INFO L175 Difference]: Start difference. First operand has 352 places, 421 transitions, 6529 flow. Second operand 7 states and 174 transitions. [2024-06-27 19:28:26,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 442 transitions, 7449 flow [2024-06-27 19:28:30,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 442 transitions, 7185 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 19:28:30,037 INFO L231 Difference]: Finished difference. Result has 355 places, 421 transitions, 6504 flow [2024-06-27 19:28:30,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6265, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6504, PETRI_PLACES=355, PETRI_TRANSITIONS=421} [2024-06-27 19:28:30,038 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 313 predicate places. [2024-06-27 19:28:30,038 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 421 transitions, 6504 flow [2024-06-27 19:28:30,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:30,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:30,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:28:30,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 19:28:30,038 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 19:28:30,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:30,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1222915467, now seen corresponding path program 3 times [2024-06-27 19:28:30,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:30,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324687775] [2024-06-27 19:28:30,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:30,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:30,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:30,132 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 19:28:30,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:30,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324687775] [2024-06-27 19:28:30,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324687775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:30,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:30,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:28:30,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495797849] [2024-06-27 19:28:30,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:30,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:28:30,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:30,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:28:30,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:28:30,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:28:30,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 421 transitions, 6504 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:30,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:30,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:28:30,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:31,099 INFO L124 PetriNetUnfolderBase]: 3022/5124 cut-off events. [2024-06-27 19:28:31,100 INFO L125 PetriNetUnfolderBase]: For 805712/805712 co-relation queries the response was YES. [2024-06-27 19:28:31,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40543 conditions, 5124 events. 3022/5124 cut-off events. For 805712/805712 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 34050 event pairs, 666 based on Foata normal form. 2/5113 useless extension candidates. Maximal degree in co-relation 40373. Up to 4434 conditions per place. [2024-06-27 19:28:31,166 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 321 selfloop transitions, 116 changer transitions 0/445 dead transitions. [2024-06-27 19:28:31,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 445 transitions, 7479 flow [2024-06-27 19:28:31,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:28:31,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:28:31,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 19:28:31,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-27 19:28:31,168 INFO L175 Difference]: Start difference. First operand has 355 places, 421 transitions, 6504 flow. Second operand 8 states and 193 transitions. [2024-06-27 19:28:31,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 445 transitions, 7479 flow [2024-06-27 19:28:33,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 445 transitions, 7250 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 19:28:33,989 INFO L231 Difference]: Finished difference. Result has 359 places, 423 transitions, 6563 flow [2024-06-27 19:28:33,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6275, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6563, PETRI_PLACES=359, PETRI_TRANSITIONS=423} [2024-06-27 19:28:33,989 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 317 predicate places. [2024-06-27 19:28:33,989 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 423 transitions, 6563 flow [2024-06-27 19:28:33,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:33,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:33,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:28:33,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 19:28:33,991 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 19:28:33,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:33,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1496750709, now seen corresponding path program 4 times [2024-06-27 19:28:33,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:33,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613680816] [2024-06-27 19:28:33,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:33,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:33,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:34,066 INFO 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 19:28:34,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:34,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613680816] [2024-06-27 19:28:34,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613680816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:34,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:34,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:28:34,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209957805] [2024-06-27 19:28:34,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:34,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:28:34,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:34,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:28:34,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:28:34,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:28:34,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 423 transitions, 6563 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:34,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:34,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:28:34,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:34,974 INFO L124 PetriNetUnfolderBase]: 3030/5141 cut-off events. [2024-06-27 19:28:34,974 INFO L125 PetriNetUnfolderBase]: For 819993/819993 co-relation queries the response was YES. [2024-06-27 19:28:35,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40807 conditions, 5141 events. 3030/5141 cut-off events. For 819993/819993 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 34259 event pairs, 637 based on Foata normal form. 2/5138 useless extension candidates. Maximal degree in co-relation 40636. Up to 4641 conditions per place. [2024-06-27 19:28:35,046 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 406 selfloop transitions, 31 changer transitions 0/445 dead transitions. [2024-06-27 19:28:35,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 445 transitions, 7545 flow [2024-06-27 19:28:35,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:28:35,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:28:35,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-27 19:28:35,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-27 19:28:35,047 INFO L175 Difference]: Start difference. First operand has 359 places, 423 transitions, 6563 flow. Second operand 8 states and 186 transitions. [2024-06-27 19:28:35,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 445 transitions, 7545 flow [2024-06-27 19:28:37,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 445 transitions, 7288 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 19:28:37,631 INFO L231 Difference]: Finished difference. Result has 362 places, 425 transitions, 6426 flow [2024-06-27 19:28:37,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6308, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6426, PETRI_PLACES=362, PETRI_TRANSITIONS=425} [2024-06-27 19:28:37,631 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-27 19:28:37,631 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 425 transitions, 6426 flow [2024-06-27 19:28:37,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:37,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:37,632 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 19:28:37,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 19:28:37,632 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 19:28:37,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:37,632 INFO L85 PathProgramCache]: Analyzing trace with hash -2040038671, now seen corresponding path program 11 times [2024-06-27 19:28:37,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:37,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060895500] [2024-06-27 19:28:37,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:37,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:37,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:37,690 INFO 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 19:28:37,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:37,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060895500] [2024-06-27 19:28:37,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060895500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:37,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:37,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:28:37,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963564980] [2024-06-27 19:28:37,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:37,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:28:37,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:37,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:28:37,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:28:37,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:28:37,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 425 transitions, 6426 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:37,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:37,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:28:37,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:38,612 INFO L124 PetriNetUnfolderBase]: 3035/5140 cut-off events. [2024-06-27 19:28:38,612 INFO L125 PetriNetUnfolderBase]: For 829424/829430 co-relation queries the response was YES. [2024-06-27 19:28:38,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40734 conditions, 5140 events. 3035/5140 cut-off events. For 829424/829430 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 34363 event pairs, 718 based on Foata normal form. 5/5134 useless extension candidates. Maximal degree in co-relation 40562. Up to 4104 conditions per place. [2024-06-27 19:28:38,680 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 249 selfloop transitions, 193 changer transitions 0/450 dead transitions. [2024-06-27 19:28:38,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 450 transitions, 7866 flow [2024-06-27 19:28:38,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:28:38,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:28:38,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 19:28:38,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-27 19:28:38,681 INFO L175 Difference]: Start difference. First operand has 362 places, 425 transitions, 6426 flow. Second operand 7 states and 178 transitions. [2024-06-27 19:28:38,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 450 transitions, 7866 flow [2024-06-27 19:28:41,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 450 transitions, 7777 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 19:28:41,694 INFO L231 Difference]: Finished difference. Result has 363 places, 428 transitions, 6791 flow [2024-06-27 19:28:41,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6337, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6791, PETRI_PLACES=363, PETRI_TRANSITIONS=428} [2024-06-27 19:28:41,694 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 321 predicate places. [2024-06-27 19:28:41,695 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 428 transitions, 6791 flow [2024-06-27 19:28:41,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:41,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:41,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:28:41,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 19:28:41,695 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 19:28:41,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:41,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1951538127, now seen corresponding path program 12 times [2024-06-27 19:28:41,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:41,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889486418] [2024-06-27 19:28:41,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:41,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:41,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:41,751 INFO 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 19:28:41,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:41,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889486418] [2024-06-27 19:28:41,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889486418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:41,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:41,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:28:41,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444993205] [2024-06-27 19:28:41,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:41,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:28:41,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:41,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:28:41,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:28:41,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:28:41,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 428 transitions, 6791 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:41,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:41,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:28:41,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:42,663 INFO L124 PetriNetUnfolderBase]: 3040/5153 cut-off events. [2024-06-27 19:28:42,663 INFO L125 PetriNetUnfolderBase]: For 846888/846894 co-relation queries the response was YES. [2024-06-27 19:28:42,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41402 conditions, 5153 events. 3040/5153 cut-off events. For 846888/846894 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 34421 event pairs, 720 based on Foata normal form. 5/5147 useless extension candidates. Maximal degree in co-relation 41229. Up to 4108 conditions per place. [2024-06-27 19:28:42,739 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 249 selfloop transitions, 193 changer transitions 0/450 dead transitions. [2024-06-27 19:28:42,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 450 transitions, 8233 flow [2024-06-27 19:28:42,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:28:42,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:28:42,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 19:28:42,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:28:42,740 INFO L175 Difference]: Start difference. First operand has 363 places, 428 transitions, 6791 flow. Second operand 7 states and 175 transitions. [2024-06-27 19:28:42,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 450 transitions, 8233 flow [2024-06-27 19:28:46,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 450 transitions, 7611 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-27 19:28:46,154 INFO L231 Difference]: Finished difference. Result has 365 places, 431 transitions, 6629 flow [2024-06-27 19:28:46,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6200, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6629, PETRI_PLACES=365, PETRI_TRANSITIONS=431} [2024-06-27 19:28:46,155 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-27 19:28:46,155 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 431 transitions, 6629 flow [2024-06-27 19:28:46,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:46,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:46,155 INFO 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 19:28:46,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 19:28:46,156 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 19:28:46,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:46,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1355861041, now seen corresponding path program 13 times [2024-06-27 19:28:46,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:46,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084287243] [2024-06-27 19:28:46,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:46,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:46,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:46,227 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 19:28:46,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:46,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084287243] [2024-06-27 19:28:46,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084287243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:46,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:46,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:28:46,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112935729] [2024-06-27 19:28:46,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:46,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:28:46,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:46,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:28:46,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:28:46,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:28:46,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 431 transitions, 6629 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:46,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:46,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:28:46,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:47,163 INFO L124 PetriNetUnfolderBase]: 3066/5197 cut-off events. [2024-06-27 19:28:47,163 INFO L125 PetriNetUnfolderBase]: For 877012/877018 co-relation queries the response was YES. [2024-06-27 19:28:47,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41829 conditions, 5197 events. 3066/5197 cut-off events. For 877012/877018 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 34795 event pairs, 720 based on Foata normal form. 6/5192 useless extension candidates. Maximal degree in co-relation 41656. Up to 4136 conditions per place. [2024-06-27 19:28:47,237 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 254 selfloop transitions, 195 changer transitions 0/457 dead transitions. [2024-06-27 19:28:47,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 457 transitions, 8175 flow [2024-06-27 19:28:47,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:28:47,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:28:47,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:28:47,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-27 19:28:47,238 INFO L175 Difference]: Start difference. First operand has 365 places, 431 transitions, 6629 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:28:47,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 457 transitions, 8175 flow [2024-06-27 19:28:50,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 457 transitions, 7792 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 19:28:50,430 INFO L231 Difference]: Finished difference. Result has 368 places, 441 transitions, 6807 flow [2024-06-27 19:28:50,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6262, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6807, PETRI_PLACES=368, PETRI_TRANSITIONS=441} [2024-06-27 19:28:50,431 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-27 19:28:50,431 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 441 transitions, 6807 flow [2024-06-27 19:28:50,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:50,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:50,431 INFO 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 19:28:50,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 19:28:50,431 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 19:28:50,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:50,431 INFO L85 PathProgramCache]: Analyzing trace with hash -247479179, now seen corresponding path program 14 times [2024-06-27 19:28:50,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:50,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983909865] [2024-06-27 19:28:50,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:50,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:50,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:50,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:28:50,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:50,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983909865] [2024-06-27 19:28:50,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983909865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:50,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:50,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:28:50,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689272556] [2024-06-27 19:28:50,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:50,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:28:50,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:50,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:28:50,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:28:50,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:28:50,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 441 transitions, 6807 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:50,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:50,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:28:50,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:51,465 INFO L124 PetriNetUnfolderBase]: 3063/5181 cut-off events. [2024-06-27 19:28:51,465 INFO L125 PetriNetUnfolderBase]: For 880238/880238 co-relation queries the response was YES. [2024-06-27 19:28:51,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41815 conditions, 5181 events. 3063/5181 cut-off events. For 880238/880238 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 34599 event pairs, 752 based on Foata normal form. 1/5168 useless extension candidates. Maximal degree in co-relation 41641. Up to 4134 conditions per place. [2024-06-27 19:28:51,540 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 247 selfloop transitions, 212 changer transitions 0/467 dead transitions. [2024-06-27 19:28:51,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 467 transitions, 8241 flow [2024-06-27 19:28:51,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:28:51,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:28:51,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 19:28:51,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-27 19:28:51,541 INFO L175 Difference]: Start difference. First operand has 368 places, 441 transitions, 6807 flow. Second operand 8 states and 202 transitions. [2024-06-27 19:28:51,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 467 transitions, 8241 flow [2024-06-27 19:28:55,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 467 transitions, 7950 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-27 19:28:55,266 INFO L231 Difference]: Finished difference. Result has 373 places, 441 transitions, 6946 flow [2024-06-27 19:28:55,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6516, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6946, PETRI_PLACES=373, PETRI_TRANSITIONS=441} [2024-06-27 19:28:55,266 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-27 19:28:55,266 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 441 transitions, 6946 flow [2024-06-27 19:28:55,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:55,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:28:55,267 INFO 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 19:28:55,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 19:28:55,267 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 19:28:55,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:28:55,267 INFO L85 PathProgramCache]: Analyzing trace with hash 371892567, now seen corresponding path program 15 times [2024-06-27 19:28:55,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:28:55,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070515194] [2024-06-27 19:28:55,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:28:55,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:28:55,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:28:55,344 INFO 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 19:28:55,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:28:55,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070515194] [2024-06-27 19:28:55,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070515194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:28:55,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:28:55,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:28:55,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270628755] [2024-06-27 19:28:55,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:28:55,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:28:55,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:28:55,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:28:55,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:28:55,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:28:55,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 441 transitions, 6946 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:28:55,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:28:55,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:28:55,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:28:56,301 INFO L124 PetriNetUnfolderBase]: 3068/5184 cut-off events. [2024-06-27 19:28:56,301 INFO L125 PetriNetUnfolderBase]: For 898897/898897 co-relation queries the response was YES. [2024-06-27 19:28:56,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42122 conditions, 5184 events. 3068/5184 cut-off events. For 898897/898897 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 34601 event pairs, 761 based on Foata normal form. 1/5169 useless extension candidates. Maximal degree in co-relation 41947. Up to 4138 conditions per place. [2024-06-27 19:28:56,372 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 246 selfloop transitions, 212 changer transitions 0/466 dead transitions. [2024-06-27 19:28:56,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 466 transitions, 8223 flow [2024-06-27 19:28:56,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:28:56,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:28:56,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 19:28:56,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-27 19:28:56,373 INFO L175 Difference]: Start difference. First operand has 373 places, 441 transitions, 6946 flow. Second operand 8 states and 196 transitions. [2024-06-27 19:28:56,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 466 transitions, 8223 flow [2024-06-27 19:29:00,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 466 transitions, 7456 flow, removed 56 selfloop flow, removed 10 redundant places. [2024-06-27 19:29:00,282 INFO L231 Difference]: Finished difference. Result has 371 places, 444 transitions, 6690 flow [2024-06-27 19:29:00,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6217, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6690, PETRI_PLACES=371, PETRI_TRANSITIONS=444} [2024-06-27 19:29:00,283 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-27 19:29:00,283 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 444 transitions, 6690 flow [2024-06-27 19:29:00,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:00,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:00,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:29:00,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 19:29:00,283 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 19:29:00,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:00,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1123057493, now seen corresponding path program 16 times [2024-06-27 19:29:00,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:00,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367310661] [2024-06-27 19:29:00,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:00,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:00,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:00,354 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 19:29:00,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:00,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367310661] [2024-06-27 19:29:00,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367310661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:00,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:00,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:29:00,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235939859] [2024-06-27 19:29:00,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:00,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:29:00,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:00,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:29:00,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:29:00,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:29:00,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 444 transitions, 6690 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:00,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:00,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:29:00,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:01,282 INFO L124 PetriNetUnfolderBase]: 3081/5196 cut-off events. [2024-06-27 19:29:01,282 INFO L125 PetriNetUnfolderBase]: For 918039/918039 co-relation queries the response was YES. [2024-06-27 19:29:01,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41934 conditions, 5196 events. 3081/5196 cut-off events. For 918039/918039 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34648 event pairs, 750 based on Foata normal form. 1/5181 useless extension candidates. Maximal degree in co-relation 41760. Up to 4148 conditions per place. [2024-06-27 19:29:01,354 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 245 selfloop transitions, 217 changer transitions 0/470 dead transitions. [2024-06-27 19:29:01,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 470 transitions, 8221 flow [2024-06-27 19:29:01,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:29:01,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:29:01,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 19:29:01,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-27 19:29:01,355 INFO L175 Difference]: Start difference. First operand has 371 places, 444 transitions, 6690 flow. Second operand 8 states and 195 transitions. [2024-06-27 19:29:01,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 470 transitions, 8221 flow [2024-06-27 19:29:05,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 470 transitions, 7929 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 19:29:05,091 INFO L231 Difference]: Finished difference. Result has 374 places, 450 transitions, 6953 flow [2024-06-27 19:29:05,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6402, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6953, PETRI_PLACES=374, PETRI_TRANSITIONS=450} [2024-06-27 19:29:05,091 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-27 19:29:05,091 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 450 transitions, 6953 flow [2024-06-27 19:29:05,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:05,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:05,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:29:05,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 19:29:05,092 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 19:29:05,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:05,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1503429281, now seen corresponding path program 17 times [2024-06-27 19:29:05,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:05,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219847201] [2024-06-27 19:29:05,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:05,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:05,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:29:05,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:05,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219847201] [2024-06-27 19:29:05,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219847201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:05,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:05,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:29:05,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357517798] [2024-06-27 19:29:05,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:05,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:29:05,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:05,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:29:05,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:29:05,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:29:05,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 450 transitions, 6953 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:05,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:05,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:29:05,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:06,101 INFO L124 PetriNetUnfolderBase]: 3078/5190 cut-off events. [2024-06-27 19:29:06,101 INFO L125 PetriNetUnfolderBase]: For 930556/930556 co-relation queries the response was YES. [2024-06-27 19:29:06,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42033 conditions, 5190 events. 3078/5190 cut-off events. For 930556/930556 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34565 event pairs, 753 based on Foata normal form. 1/5175 useless extension candidates. Maximal degree in co-relation 41856. Up to 4146 conditions per place. [2024-06-27 19:29:06,178 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 247 selfloop transitions, 214 changer transitions 0/469 dead transitions. [2024-06-27 19:29:06,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 469 transitions, 8153 flow [2024-06-27 19:29:06,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:29:06,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:29:06,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 19:29:06,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-27 19:29:06,179 INFO L175 Difference]: Start difference. First operand has 374 places, 450 transitions, 6953 flow. Second operand 8 states and 193 transitions. [2024-06-27 19:29:06,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 469 transitions, 8153 flow [2024-06-27 19:29:09,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 469 transitions, 7851 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 19:29:09,516 INFO L231 Difference]: Finished difference. Result has 378 places, 450 transitions, 7085 flow [2024-06-27 19:29:09,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6651, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7085, PETRI_PLACES=378, PETRI_TRANSITIONS=450} [2024-06-27 19:29:09,516 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-27 19:29:09,516 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 450 transitions, 7085 flow [2024-06-27 19:29:09,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:09,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:09,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:29:09,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 19:29:09,517 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 19:29:09,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:09,517 INFO L85 PathProgramCache]: Analyzing trace with hash -214672839, now seen corresponding path program 18 times [2024-06-27 19:29:09,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:09,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164329033] [2024-06-27 19:29:09,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:09,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:09,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:29:09,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:09,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164329033] [2024-06-27 19:29:09,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164329033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:09,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:09,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:29:09,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137095336] [2024-06-27 19:29:09,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:09,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:29:09,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:09,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:29:09,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:29:09,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:29:09,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 450 transitions, 7085 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:09,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:09,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:29:09,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:10,607 INFO L124 PetriNetUnfolderBase]: 3072/5194 cut-off events. [2024-06-27 19:29:10,607 INFO L125 PetriNetUnfolderBase]: For 942266/942266 co-relation queries the response was YES. [2024-06-27 19:29:10,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41969 conditions, 5194 events. 3072/5194 cut-off events. For 942266/942266 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34766 event pairs, 728 based on Foata normal form. 2/5180 useless extension candidates. Maximal degree in co-relation 41790. Up to 4141 conditions per place. [2024-06-27 19:29:10,675 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 250 selfloop transitions, 209 changer transitions 0/467 dead transitions. [2024-06-27 19:29:10,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 467 transitions, 8511 flow [2024-06-27 19:29:10,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:29:10,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:29:10,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 19:29:10,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-27 19:29:10,677 INFO L175 Difference]: Start difference. First operand has 378 places, 450 transitions, 7085 flow. Second operand 8 states and 195 transitions. [2024-06-27 19:29:10,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 467 transitions, 8511 flow [2024-06-27 19:29:14,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 467 transitions, 7915 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 19:29:14,137 INFO L231 Difference]: Finished difference. Result has 378 places, 450 transitions, 6914 flow [2024-06-27 19:29:14,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6489, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6914, PETRI_PLACES=378, PETRI_TRANSITIONS=450} [2024-06-27 19:29:14,138 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-27 19:29:14,138 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 450 transitions, 6914 flow [2024-06-27 19:29:14,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:14,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:14,138 INFO 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 19:29:14,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 19:29:14,138 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 19:29:14,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:14,139 INFO L85 PathProgramCache]: Analyzing trace with hash 147000181, now seen corresponding path program 19 times [2024-06-27 19:29:14,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:14,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134425667] [2024-06-27 19:29:14,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:14,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:14,217 INFO 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 19:29:14,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:14,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134425667] [2024-06-27 19:29:14,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134425667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:14,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:14,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:29:14,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502091132] [2024-06-27 19:29:14,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:14,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:29:14,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:14,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:29:14,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:29:14,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:29:14,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 450 transitions, 6914 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:14,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:14,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:29:14,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:15,195 INFO L124 PetriNetUnfolderBase]: 3066/5198 cut-off events. [2024-06-27 19:29:15,195 INFO L125 PetriNetUnfolderBase]: For 938204/938204 co-relation queries the response was YES. [2024-06-27 19:29:15,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41714 conditions, 5198 events. 3066/5198 cut-off events. For 938204/938204 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34853 event pairs, 738 based on Foata normal form. 2/5184 useless extension candidates. Maximal degree in co-relation 41535. Up to 4136 conditions per place. [2024-06-27 19:29:15,269 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 246 selfloop transitions, 216 changer transitions 0/470 dead transitions. [2024-06-27 19:29:15,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 470 transitions, 8592 flow [2024-06-27 19:29:15,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:29:15,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:29:15,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-06-27 19:29:15,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5829268292682926 [2024-06-27 19:29:15,270 INFO L175 Difference]: Start difference. First operand has 378 places, 450 transitions, 6914 flow. Second operand 10 states and 239 transitions. [2024-06-27 19:29:15,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 470 transitions, 8592 flow [2024-06-27 19:29:19,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 470 transitions, 7967 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-27 19:29:19,355 INFO L231 Difference]: Finished difference. Result has 381 places, 450 transitions, 6728 flow [2024-06-27 19:29:19,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6289, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6728, PETRI_PLACES=381, PETRI_TRANSITIONS=450} [2024-06-27 19:29:19,355 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 339 predicate places. [2024-06-27 19:29:19,356 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 450 transitions, 6728 flow [2024-06-27 19:29:19,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:19,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:19,356 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 19:29:19,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 19:29:19,356 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 19:29:19,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:19,357 INFO L85 PathProgramCache]: Analyzing trace with hash 146792791, now seen corresponding path program 20 times [2024-06-27 19:29:19,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:19,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657379252] [2024-06-27 19:29:19,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:19,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:19,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:19,433 INFO 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 19:29:19,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:19,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657379252] [2024-06-27 19:29:19,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657379252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:19,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:19,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:29:19,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551928417] [2024-06-27 19:29:19,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:19,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:29:19,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:19,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:29:19,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:29:19,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:29:19,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 450 transitions, 6728 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:19,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:19,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:29:19,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:20,410 INFO L124 PetriNetUnfolderBase]: 3060/5178 cut-off events. [2024-06-27 19:29:20,410 INFO L125 PetriNetUnfolderBase]: For 935885/935885 co-relation queries the response was YES. [2024-06-27 19:29:20,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41201 conditions, 5178 events. 3060/5178 cut-off events. For 935885/935885 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34651 event pairs, 762 based on Foata normal form. 2/5164 useless extension candidates. Maximal degree in co-relation 41022. Up to 4131 conditions per place. [2024-06-27 19:29:20,483 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 249 selfloop transitions, 209 changer transitions 0/466 dead transitions. [2024-06-27 19:29:20,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 466 transitions, 7920 flow [2024-06-27 19:29:20,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:29:20,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:29:20,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 19:29:20,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-27 19:29:20,484 INFO L175 Difference]: Start difference. First operand has 381 places, 450 transitions, 6728 flow. Second operand 8 states and 192 transitions. [2024-06-27 19:29:20,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 466 transitions, 7920 flow [2024-06-27 19:29:24,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 466 transitions, 7220 flow, removed 14 selfloop flow, removed 11 redundant places. [2024-06-27 19:29:24,071 INFO L231 Difference]: Finished difference. Result has 378 places, 450 transitions, 6453 flow [2024-06-27 19:29:24,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6028, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6453, PETRI_PLACES=378, PETRI_TRANSITIONS=450} [2024-06-27 19:29:24,071 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-27 19:29:24,071 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 450 transitions, 6453 flow [2024-06-27 19:29:24,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:24,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:24,071 INFO 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 19:29:24,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 19:29:24,071 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 19:29:24,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:24,072 INFO L85 PathProgramCache]: Analyzing trace with hash -36375597, now seen corresponding path program 21 times [2024-06-27 19:29:24,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:24,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032942322] [2024-06-27 19:29:24,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:24,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:24,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:29:24,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:24,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032942322] [2024-06-27 19:29:24,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032942322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:24,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:24,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:29:24,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149970380] [2024-06-27 19:29:24,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:24,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:29:24,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:24,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:29:24,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:29:24,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:29:24,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 450 transitions, 6453 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:24,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:24,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:29:24,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:25,075 INFO L124 PetriNetUnfolderBase]: 3054/5196 cut-off events. [2024-06-27 19:29:25,076 INFO L125 PetriNetUnfolderBase]: For 930137/930137 co-relation queries the response was YES. [2024-06-27 19:29:25,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40737 conditions, 5196 events. 3054/5196 cut-off events. For 930137/930137 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34825 event pairs, 639 based on Foata normal form. 2/5195 useless extension candidates. Maximal degree in co-relation 40559. Up to 4380 conditions per place. [2024-06-27 19:29:25,149 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 342 selfloop transitions, 133 changer transitions 0/483 dead transitions. [2024-06-27 19:29:25,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 483 transitions, 8205 flow [2024-06-27 19:29:25,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:29:25,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:29:25,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-27 19:29:25,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.649390243902439 [2024-06-27 19:29:25,150 INFO L175 Difference]: Start difference. First operand has 378 places, 450 transitions, 6453 flow. Second operand 8 states and 213 transitions. [2024-06-27 19:29:25,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 483 transitions, 8205 flow [2024-06-27 19:29:28,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 483 transitions, 7708 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 19:29:28,659 INFO L231 Difference]: Finished difference. Result has 378 places, 450 transitions, 6237 flow [2024-06-27 19:29:28,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5956, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6237, PETRI_PLACES=378, PETRI_TRANSITIONS=450} [2024-06-27 19:29:28,660 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-27 19:29:28,660 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 450 transitions, 6237 flow [2024-06-27 19:29:28,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:28,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:28,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:29:28,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 19:29:28,660 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 19:29:28,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:28,661 INFO L85 PathProgramCache]: Analyzing trace with hash 220124913, now seen corresponding path program 22 times [2024-06-27 19:29:28,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:28,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791470436] [2024-06-27 19:29:28,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:28,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:28,723 INFO 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 19:29:28,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:28,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791470436] [2024-06-27 19:29:28,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791470436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:28,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:28,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:29:28,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540227756] [2024-06-27 19:29:28,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:28,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:29:28,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:28,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:29:28,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:29:28,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:29:28,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 450 transitions, 6237 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:28,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:28,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:29:28,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:29,652 INFO L124 PetriNetUnfolderBase]: 3048/5175 cut-off events. [2024-06-27 19:29:29,652 INFO L125 PetriNetUnfolderBase]: For 927641/927641 co-relation queries the response was YES. [2024-06-27 19:29:29,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40319 conditions, 5175 events. 3048/5175 cut-off events. For 927641/927641 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34686 event pairs, 657 based on Foata normal form. 2/5171 useless extension candidates. Maximal degree in co-relation 40140. Up to 4375 conditions per place. [2024-06-27 19:29:29,725 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 349 selfloop transitions, 117 changer transitions 0/474 dead transitions. [2024-06-27 19:29:29,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 474 transitions, 7471 flow [2024-06-27 19:29:29,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:29:29,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:29:29,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-27 19:29:29,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376306620209059 [2024-06-27 19:29:29,726 INFO L175 Difference]: Start difference. First operand has 378 places, 450 transitions, 6237 flow. Second operand 7 states and 183 transitions. [2024-06-27 19:29:29,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 474 transitions, 7471 flow [2024-06-27 19:29:33,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 474 transitions, 7174 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 19:29:33,355 INFO L231 Difference]: Finished difference. Result has 377 places, 450 transitions, 6189 flow [2024-06-27 19:29:33,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5944, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6189, PETRI_PLACES=377, PETRI_TRANSITIONS=450} [2024-06-27 19:29:33,355 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-27 19:29:33,355 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 450 transitions, 6189 flow [2024-06-27 19:29:33,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:33,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:33,355 INFO 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 19:29:33,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 19:29:33,356 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 19:29:33,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:33,356 INFO L85 PathProgramCache]: Analyzing trace with hash -36582987, now seen corresponding path program 23 times [2024-06-27 19:29:33,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:33,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944461236] [2024-06-27 19:29:33,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:33,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:33,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:33,428 INFO 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 19:29:33,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:33,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944461236] [2024-06-27 19:29:33,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944461236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:33,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:33,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:29:33,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829382977] [2024-06-27 19:29:33,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:33,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:29:33,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:33,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:29:33,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:29:33,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:29:33,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 450 transitions, 6189 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:33,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:33,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:29:33,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:34,352 INFO L124 PetriNetUnfolderBase]: 3042/5167 cut-off events. [2024-06-27 19:29:34,353 INFO L125 PetriNetUnfolderBase]: For 898642/898642 co-relation queries the response was YES. [2024-06-27 19:29:34,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39894 conditions, 5167 events. 3042/5167 cut-off events. For 898642/898642 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34677 event pairs, 657 based on Foata normal form. 2/5163 useless extension candidates. Maximal degree in co-relation 39716. Up to 4370 conditions per place. [2024-06-27 19:29:34,427 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 352 selfloop transitions, 118 changer transitions 0/478 dead transitions. [2024-06-27 19:29:34,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 478 transitions, 7439 flow [2024-06-27 19:29:34,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:29:34,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:29:34,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-27 19:29:34,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6310975609756098 [2024-06-27 19:29:34,428 INFO L175 Difference]: Start difference. First operand has 377 places, 450 transitions, 6189 flow. Second operand 8 states and 207 transitions. [2024-06-27 19:29:34,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 478 transitions, 7439 flow [2024-06-27 19:29:37,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 478 transitions, 6955 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-27 19:29:37,927 INFO L231 Difference]: Finished difference. Result has 374 places, 450 transitions, 5954 flow [2024-06-27 19:29:37,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5707, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5954, PETRI_PLACES=374, PETRI_TRANSITIONS=450} [2024-06-27 19:29:37,928 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-27 19:29:37,928 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 450 transitions, 5954 flow [2024-06-27 19:29:37,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:37,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:37,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:29:37,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 19:29:37,928 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 19:29:37,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:37,928 INFO L85 PathProgramCache]: Analyzing trace with hash 18982899, now seen corresponding path program 24 times [2024-06-27 19:29:37,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:37,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204649342] [2024-06-27 19:29:37,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:37,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:37,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:38,001 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 19:29:38,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:38,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204649342] [2024-06-27 19:29:38,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204649342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:38,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:38,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:29:38,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500187482] [2024-06-27 19:29:38,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:38,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:29:38,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:38,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:29:38,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:29:38,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:29:38,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 450 transitions, 5954 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:38,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:38,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:29:38,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:38,931 INFO L124 PetriNetUnfolderBase]: 3036/5168 cut-off events. [2024-06-27 19:29:38,931 INFO L125 PetriNetUnfolderBase]: For 880535/880535 co-relation queries the response was YES. [2024-06-27 19:29:38,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39470 conditions, 5168 events. 3036/5168 cut-off events. For 880535/880535 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34621 event pairs, 637 based on Foata normal form. 2/5167 useless extension candidates. Maximal degree in co-relation 39293. Up to 4365 conditions per place. [2024-06-27 19:29:39,001 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 348 selfloop transitions, 129 changer transitions 0/485 dead transitions. [2024-06-27 19:29:39,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 485 transitions, 7236 flow [2024-06-27 19:29:39,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:29:39,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:29:39,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-27 19:29:39,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6368563685636857 [2024-06-27 19:29:39,002 INFO L175 Difference]: Start difference. First operand has 374 places, 450 transitions, 5954 flow. Second operand 9 states and 235 transitions. [2024-06-27 19:29:39,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 485 transitions, 7236 flow [2024-06-27 19:29:42,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 485 transitions, 7034 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 19:29:42,111 INFO L231 Difference]: Finished difference. Result has 376 places, 450 transitions, 6027 flow [2024-06-27 19:29:42,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5754, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6027, PETRI_PLACES=376, PETRI_TRANSITIONS=450} [2024-06-27 19:29:42,112 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-27 19:29:42,112 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 450 transitions, 6027 flow [2024-06-27 19:29:42,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:42,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:42,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:29:42,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 19:29:42,112 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 19:29:42,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:42,112 INFO L85 PathProgramCache]: Analyzing trace with hash 696849013, now seen corresponding path program 5 times [2024-06-27 19:29:42,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:42,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145608078] [2024-06-27 19:29:42,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:42,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:42,192 INFO 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 19:29:42,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:42,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145608078] [2024-06-27 19:29:42,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145608078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:42,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:42,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:29:42,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368750820] [2024-06-27 19:29:42,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:42,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:29:42,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:42,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:29:42,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:29:42,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:29:42,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 450 transitions, 6027 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:42,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:42,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:29:42,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:43,239 INFO L124 PetriNetUnfolderBase]: 3044/5167 cut-off events. [2024-06-27 19:29:43,239 INFO L125 PetriNetUnfolderBase]: For 884056/884056 co-relation queries the response was YES. [2024-06-27 19:29:43,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39654 conditions, 5167 events. 3044/5167 cut-off events. For 884056/884056 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 34661 event pairs, 688 based on Foata normal form. 2/5161 useless extension candidates. Maximal degree in co-relation 39477. Up to 4469 conditions per place. [2024-06-27 19:29:43,307 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 360 selfloop transitions, 103 changer transitions 0/471 dead transitions. [2024-06-27 19:29:43,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 471 transitions, 7050 flow [2024-06-27 19:29:43,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:29:43,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:29:43,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-27 19:29:43,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-27 19:29:43,308 INFO L175 Difference]: Start difference. First operand has 376 places, 450 transitions, 6027 flow. Second operand 8 states and 188 transitions. [2024-06-27 19:29:43,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 471 transitions, 7050 flow [2024-06-27 19:29:47,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 471 transitions, 6731 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-27 19:29:47,049 INFO L231 Difference]: Finished difference. Result has 373 places, 452 transitions, 5974 flow [2024-06-27 19:29:47,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5708, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5974, PETRI_PLACES=373, PETRI_TRANSITIONS=452} [2024-06-27 19:29:47,050 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-27 19:29:47,050 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 452 transitions, 5974 flow [2024-06-27 19:29:47,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:47,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:47,050 INFO 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 19:29:47,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 19:29:47,050 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 19:29:47,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:47,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1762495345, now seen corresponding path program 6 times [2024-06-27 19:29:47,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:47,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373307538] [2024-06-27 19:29:47,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:47,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:47,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:47,113 INFO 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 19:29:47,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:47,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373307538] [2024-06-27 19:29:47,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373307538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:47,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:47,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:29:47,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737527134] [2024-06-27 19:29:47,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:47,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:29:47,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:47,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:29:47,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:29:47,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:29:47,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 452 transitions, 5974 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:47,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:47,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:29:47,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:48,087 INFO L124 PetriNetUnfolderBase]: 3229/5509 cut-off events. [2024-06-27 19:29:48,087 INFO L125 PetriNetUnfolderBase]: For 1087712/1087718 co-relation queries the response was YES. [2024-06-27 19:29:48,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45233 conditions, 5509 events. 3229/5509 cut-off events. For 1087712/1087718 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 37519 event pairs, 750 based on Foata normal form. 6/5506 useless extension candidates. Maximal degree in co-relation 45057. Up to 4549 conditions per place. [2024-06-27 19:29:48,164 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 371 selfloop transitions, 107 changer transitions 0/486 dead transitions. [2024-06-27 19:29:48,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 486 transitions, 7432 flow [2024-06-27 19:29:48,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:29:48,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:29:48,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 19:29:48,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-27 19:29:48,165 INFO L175 Difference]: Start difference. First operand has 373 places, 452 transitions, 5974 flow. Second operand 7 states and 177 transitions. [2024-06-27 19:29:48,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 486 transitions, 7432 flow [2024-06-27 19:29:51,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 486 transitions, 7199 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 19:29:51,590 INFO L231 Difference]: Finished difference. Result has 376 places, 460 transitions, 6180 flow [2024-06-27 19:29:51,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5741, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6180, PETRI_PLACES=376, PETRI_TRANSITIONS=460} [2024-06-27 19:29:51,591 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-27 19:29:51,591 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 460 transitions, 6180 flow [2024-06-27 19:29:51,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:51,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:51,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:29:51,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 19:29:51,591 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 19:29:51,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:51,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1951530191, now seen corresponding path program 7 times [2024-06-27 19:29:51,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:51,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465314373] [2024-06-27 19:29:51,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:51,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:51,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:51,659 INFO 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 19:29:51,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:51,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465314373] [2024-06-27 19:29:51,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465314373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:51,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:51,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:29:51,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654717904] [2024-06-27 19:29:51,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:51,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:29:51,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:51,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:29:51,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:29:51,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:29:51,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 460 transitions, 6180 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:51,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:51,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:29:51,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:52,657 INFO L124 PetriNetUnfolderBase]: 3237/5528 cut-off events. [2024-06-27 19:29:52,658 INFO L125 PetriNetUnfolderBase]: For 1106521/1106527 co-relation queries the response was YES. [2024-06-27 19:29:52,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45819 conditions, 5528 events. 3237/5528 cut-off events. For 1106521/1106527 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 37711 event pairs, 759 based on Foata normal form. 6/5527 useless extension candidates. Maximal degree in co-relation 45641. Up to 4760 conditions per place. [2024-06-27 19:29:52,733 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 372 selfloop transitions, 100 changer transitions 0/480 dead transitions. [2024-06-27 19:29:52,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 480 transitions, 7219 flow [2024-06-27 19:29:52,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:29:52,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:29:52,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 19:29:52,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-27 19:29:52,734 INFO L175 Difference]: Start difference. First operand has 376 places, 460 transitions, 6180 flow. Second operand 7 states and 169 transitions. [2024-06-27 19:29:52,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 480 transitions, 7219 flow [2024-06-27 19:29:57,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 480 transitions, 6964 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-27 19:29:57,070 INFO L231 Difference]: Finished difference. Result has 379 places, 462 transitions, 6185 flow [2024-06-27 19:29:57,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5933, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6185, PETRI_PLACES=379, PETRI_TRANSITIONS=462} [2024-06-27 19:29:57,070 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 337 predicate places. [2024-06-27 19:29:57,070 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 462 transitions, 6185 flow [2024-06-27 19:29:57,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:57,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:29:57,071 INFO 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 19:29:57,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 19:29:57,071 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 19:29:57,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:29:57,071 INFO L85 PathProgramCache]: Analyzing trace with hash 326020347, now seen corresponding path program 8 times [2024-06-27 19:29:57,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:29:57,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792633548] [2024-06-27 19:29:57,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:29:57,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:29:57,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:29:57,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:29:57,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:29:57,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792633548] [2024-06-27 19:29:57,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792633548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:29:57,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:29:57,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:29:57,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146662662] [2024-06-27 19:29:57,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:29:57,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:29:57,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:29:57,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:29:57,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:29:57,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:29:57,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 462 transitions, 6185 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:29:57,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:29:57,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:29:57,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:29:58,153 INFO L124 PetriNetUnfolderBase]: 3245/5554 cut-off events. [2024-06-27 19:29:58,153 INFO L125 PetriNetUnfolderBase]: For 1122566/1122572 co-relation queries the response was YES. [2024-06-27 19:29:58,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45798 conditions, 5554 events. 3245/5554 cut-off events. For 1122566/1122572 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 37842 event pairs, 604 based on Foata normal form. 6/5553 useless extension candidates. Maximal degree in co-relation 45619. Up to 3373 conditions per place. [2024-06-27 19:29:58,233 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 354 selfloop transitions, 133 changer transitions 0/495 dead transitions. [2024-06-27 19:29:58,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 495 transitions, 7788 flow [2024-06-27 19:29:58,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:29:58,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:29:58,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 19:29:58,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-27 19:29:58,234 INFO L175 Difference]: Start difference. First operand has 379 places, 462 transitions, 6185 flow. Second operand 7 states and 181 transitions. [2024-06-27 19:29:58,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 495 transitions, 7788 flow [2024-06-27 19:30:02,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 495 transitions, 7569 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 19:30:02,700 INFO L231 Difference]: Finished difference. Result has 382 places, 464 transitions, 6282 flow [2024-06-27 19:30:02,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5966, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6282, PETRI_PLACES=382, PETRI_TRANSITIONS=464} [2024-06-27 19:30:02,700 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 340 predicate places. [2024-06-27 19:30:02,700 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 464 transitions, 6282 flow [2024-06-27 19:30:02,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:02,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:02,701 INFO 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 19:30:02,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 19:30:02,701 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 19:30:02,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:02,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1380146383, now seen corresponding path program 9 times [2024-06-27 19:30:02,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:02,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3034925] [2024-06-27 19:30:02,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:02,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:02,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:02,770 INFO 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 19:30:02,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:02,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3034925] [2024-06-27 19:30:02,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3034925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:02,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:02,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:30:02,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194301716] [2024-06-27 19:30:02,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:02,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:30:02,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:02,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:30:02,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:30:02,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:30:02,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 464 transitions, 6282 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:02,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:02,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:30:02,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:30:03,775 INFO L124 PetriNetUnfolderBase]: 3220/5502 cut-off events. [2024-06-27 19:30:03,776 INFO L125 PetriNetUnfolderBase]: For 1129442/1129448 co-relation queries the response was YES. [2024-06-27 19:30:03,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45300 conditions, 5502 events. 3220/5502 cut-off events. For 1129442/1129448 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 37480 event pairs, 669 based on Foata normal form. 12/5507 useless extension candidates. Maximal degree in co-relation 45120. Up to 3359 conditions per place. [2024-06-27 19:30:03,855 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 364 selfloop transitions, 120 changer transitions 0/492 dead transitions. [2024-06-27 19:30:03,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 492 transitions, 7592 flow [2024-06-27 19:30:03,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:30:03,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:30:03,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 19:30:03,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-27 19:30:03,856 INFO L175 Difference]: Start difference. First operand has 382 places, 464 transitions, 6282 flow. Second operand 7 states and 178 transitions. [2024-06-27 19:30:03,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 492 transitions, 7592 flow [2024-06-27 19:30:08,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 492 transitions, 7224 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-27 19:30:08,115 INFO L231 Difference]: Finished difference. Result has 383 places, 464 transitions, 6160 flow [2024-06-27 19:30:08,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5914, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6160, PETRI_PLACES=383, PETRI_TRANSITIONS=464} [2024-06-27 19:30:08,115 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 341 predicate places. [2024-06-27 19:30:08,115 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 464 transitions, 6160 flow [2024-06-27 19:30:08,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:08,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:08,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:30:08,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 19:30:08,116 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 19:30:08,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:08,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1355868977, now seen corresponding path program 10 times [2024-06-27 19:30:08,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:08,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490823878] [2024-06-27 19:30:08,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:08,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:08,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:08,199 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 19:30:08,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:08,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490823878] [2024-06-27 19:30:08,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490823878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:08,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:08,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:30:08,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55945386] [2024-06-27 19:30:08,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:08,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:30:08,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:08,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:30:08,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:30:08,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:30:08,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 464 transitions, 6160 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:08,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:08,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:30:08,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:30:09,272 INFO L124 PetriNetUnfolderBase]: 3197/5470 cut-off events. [2024-06-27 19:30:09,272 INFO L125 PetriNetUnfolderBase]: For 1083210/1083216 co-relation queries the response was YES. [2024-06-27 19:30:09,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43313 conditions, 5470 events. 3197/5470 cut-off events. For 1083210/1083216 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 37333 event pairs, 741 based on Foata normal form. 14/5477 useless extension candidates. Maximal degree in co-relation 43134. Up to 4668 conditions per place. [2024-06-27 19:30:09,344 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 382 selfloop transitions, 92 changer transitions 0/482 dead transitions. [2024-06-27 19:30:09,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 482 transitions, 7164 flow [2024-06-27 19:30:09,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:30:09,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:30:09,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 19:30:09,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-27 19:30:09,345 INFO L175 Difference]: Start difference. First operand has 383 places, 464 transitions, 6160 flow. Second operand 7 states and 170 transitions. [2024-06-27 19:30:09,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 482 transitions, 7164 flow [2024-06-27 19:30:13,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 482 transitions, 6906 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 19:30:13,398 INFO L231 Difference]: Finished difference. Result has 384 places, 464 transitions, 6092 flow [2024-06-27 19:30:13,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5902, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6092, PETRI_PLACES=384, PETRI_TRANSITIONS=464} [2024-06-27 19:30:13,398 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 342 predicate places. [2024-06-27 19:30:13,398 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 464 transitions, 6092 flow [2024-06-27 19:30:13,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:13,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:13,399 INFO 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 19:30:13,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 19:30:13,399 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 19:30:13,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:13,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1322053933, now seen corresponding path program 11 times [2024-06-27 19:30:13,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:13,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369385648] [2024-06-27 19:30:13,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:13,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:13,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:13,463 INFO 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 19:30:13,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:13,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369385648] [2024-06-27 19:30:13,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369385648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:13,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:13,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:30:13,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155533070] [2024-06-27 19:30:13,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:13,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:30:13,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:13,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:30:13,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:30:13,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:30:13,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 464 transitions, 6092 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:13,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:13,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:30:13,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:30:14,421 INFO L124 PetriNetUnfolderBase]: 3167/5420 cut-off events. [2024-06-27 19:30:14,421 INFO L125 PetriNetUnfolderBase]: For 1019579/1019585 co-relation queries the response was YES. [2024-06-27 19:30:14,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41451 conditions, 5420 events. 3167/5420 cut-off events. For 1019579/1019585 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 37001 event pairs, 711 based on Foata normal form. 14/5427 useless extension candidates. Maximal degree in co-relation 41271. Up to 4416 conditions per place. [2024-06-27 19:30:14,497 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 381 selfloop transitions, 97 changer transitions 0/486 dead transitions. [2024-06-27 19:30:14,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 486 transitions, 7126 flow [2024-06-27 19:30:14,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:30:14,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:30:14,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:30:14,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-27 19:30:14,498 INFO L175 Difference]: Start difference. First operand has 384 places, 464 transitions, 6092 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:30:14,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 486 transitions, 7126 flow [2024-06-27 19:30:18,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 486 transitions, 6904 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 19:30:18,709 INFO L231 Difference]: Finished difference. Result has 386 places, 464 transitions, 6071 flow [2024-06-27 19:30:18,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5870, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6071, PETRI_PLACES=386, PETRI_TRANSITIONS=464} [2024-06-27 19:30:18,709 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-27 19:30:18,709 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 464 transitions, 6071 flow [2024-06-27 19:30:18,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:18,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:18,709 INFO 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 19:30:18,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 19:30:18,709 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 19:30:18,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:18,710 INFO L85 PathProgramCache]: Analyzing trace with hash -774155373, now seen corresponding path program 12 times [2024-06-27 19:30:18,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:18,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922692497] [2024-06-27 19:30:18,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:18,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:18,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:18,790 INFO 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 19:30:18,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:18,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922692497] [2024-06-27 19:30:18,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922692497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:18,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:18,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:30:18,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868606623] [2024-06-27 19:30:18,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:18,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:30:18,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:18,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:30:18,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:30:18,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:30:18,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 464 transitions, 6071 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:18,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:18,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:30:18,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:30:19,779 INFO L124 PetriNetUnfolderBase]: 3144/5381 cut-off events. [2024-06-27 19:30:19,779 INFO L125 PetriNetUnfolderBase]: For 955759/955759 co-relation queries the response was YES. [2024-06-27 19:30:19,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39869 conditions, 5381 events. 3144/5381 cut-off events. For 955759/955759 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 36726 event pairs, 720 based on Foata normal form. 10/5383 useless extension candidates. Maximal degree in co-relation 39688. Up to 4589 conditions per place. [2024-06-27 19:30:19,860 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 374 selfloop transitions, 103 changer transitions 0/485 dead transitions. [2024-06-27 19:30:19,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 485 transitions, 7087 flow [2024-06-27 19:30:19,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:30:19,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:30:19,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-27 19:30:19,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634146341463414 [2024-06-27 19:30:19,861 INFO L175 Difference]: Start difference. First operand has 386 places, 464 transitions, 6071 flow. Second operand 10 states and 231 transitions. [2024-06-27 19:30:19,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 485 transitions, 7087 flow [2024-06-27 19:30:23,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 485 transitions, 6878 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 19:30:23,173 INFO L231 Difference]: Finished difference. Result has 390 places, 464 transitions, 6074 flow [2024-06-27 19:30:23,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5862, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6074, PETRI_PLACES=390, PETRI_TRANSITIONS=464} [2024-06-27 19:30:23,173 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-27 19:30:23,173 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 464 transitions, 6074 flow [2024-06-27 19:30:23,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:23,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:23,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:30:23,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 19:30:23,174 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 19:30:23,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:23,174 INFO L85 PathProgramCache]: Analyzing trace with hash 412705397, now seen corresponding path program 13 times [2024-06-27 19:30:23,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:23,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112114704] [2024-06-27 19:30:23,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:23,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:23,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:23,254 INFO 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 19:30:23,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:23,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112114704] [2024-06-27 19:30:23,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112114704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:23,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:23,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:30:23,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213001571] [2024-06-27 19:30:23,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:23,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:30:23,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:23,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:30:23,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:30:23,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:30:23,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 464 transitions, 6074 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:23,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:23,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:30:23,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:30:24,191 INFO L124 PetriNetUnfolderBase]: 3121/5348 cut-off events. [2024-06-27 19:30:24,191 INFO L125 PetriNetUnfolderBase]: For 890110/890110 co-relation queries the response was YES. [2024-06-27 19:30:24,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38447 conditions, 5348 events. 3121/5348 cut-off events. For 890110/890110 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 36450 event pairs, 711 based on Foata normal form. 10/5350 useless extension candidates. Maximal degree in co-relation 38265. Up to 4556 conditions per place. [2024-06-27 19:30:24,266 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 376 selfloop transitions, 99 changer transitions 0/483 dead transitions. [2024-06-27 19:30:24,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 483 transitions, 7082 flow [2024-06-27 19:30:24,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:30:24,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:30:24,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:30:24,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-27 19:30:24,267 INFO L175 Difference]: Start difference. First operand has 390 places, 464 transitions, 6074 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:30:24,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 483 transitions, 7082 flow [2024-06-27 19:30:28,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 483 transitions, 6848 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-27 19:30:28,264 INFO L231 Difference]: Finished difference. Result has 390 places, 464 transitions, 6044 flow [2024-06-27 19:30:28,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5840, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6044, PETRI_PLACES=390, PETRI_TRANSITIONS=464} [2024-06-27 19:30:28,264 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-27 19:30:28,264 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 464 transitions, 6044 flow [2024-06-27 19:30:28,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:28,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:28,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:30:28,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 19:30:28,265 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 19:30:28,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:28,265 INFO L85 PathProgramCache]: Analyzing trace with hash 413031827, now seen corresponding path program 14 times [2024-06-27 19:30:28,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:28,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170002484] [2024-06-27 19:30:28,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:28,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:28,339 INFO 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 19:30:28,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:28,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170002484] [2024-06-27 19:30:28,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170002484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:28,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:28,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:30:28,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272592096] [2024-06-27 19:30:28,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:28,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:30:28,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:28,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:30:28,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:30:28,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:30:28,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 464 transitions, 6044 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:28,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:28,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:30:28,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:30:29,332 INFO L124 PetriNetUnfolderBase]: 3091/5300 cut-off events. [2024-06-27 19:30:29,332 INFO L125 PetriNetUnfolderBase]: For 820510/820510 co-relation queries the response was YES. [2024-06-27 19:30:29,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36771 conditions, 5300 events. 3091/5300 cut-off events. For 820510/820510 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 36138 event pairs, 681 based on Foata normal form. 10/5302 useless extension candidates. Maximal degree in co-relation 36588. Up to 4182 conditions per place. [2024-06-27 19:30:29,583 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 373 selfloop transitions, 106 changer transitions 0/487 dead transitions. [2024-06-27 19:30:29,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 487 transitions, 7082 flow [2024-06-27 19:30:29,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:30:29,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:30:29,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:30:29,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-27 19:30:29,584 INFO L175 Difference]: Start difference. First operand has 390 places, 464 transitions, 6044 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:30:29,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 487 transitions, 7082 flow [2024-06-27 19:30:33,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 487 transitions, 6844 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 19:30:33,308 INFO L231 Difference]: Finished difference. Result has 392 places, 464 transitions, 6026 flow [2024-06-27 19:30:33,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5806, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6026, PETRI_PLACES=392, PETRI_TRANSITIONS=464} [2024-06-27 19:30:33,308 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 350 predicate places. [2024-06-27 19:30:33,308 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 464 transitions, 6026 flow [2024-06-27 19:30:33,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:33,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:33,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:30:33,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 19:30:33,309 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 19:30:33,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:33,309 INFO L85 PathProgramCache]: Analyzing trace with hash 575289485, now seen corresponding path program 1 times [2024-06-27 19:30:33,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:33,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933697491] [2024-06-27 19:30:33,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:33,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:33,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:33,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:30:33,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:33,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933697491] [2024-06-27 19:30:33,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933697491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:33,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:33,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:30:33,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232848840] [2024-06-27 19:30:33,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:33,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:30:33,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:33,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:30:33,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:30:33,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:30:33,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 464 transitions, 6026 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:33,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:33,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:30:33,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:30:34,476 INFO L124 PetriNetUnfolderBase]: 3099/5307 cut-off events. [2024-06-27 19:30:34,476 INFO L125 PetriNetUnfolderBase]: For 769248/769248 co-relation queries the response was YES. [2024-06-27 19:30:34,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36820 conditions, 5307 events. 3099/5307 cut-off events. For 769248/769248 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 36206 event pairs, 708 based on Foata normal form. 2/5301 useless extension candidates. Maximal degree in co-relation 36636. Up to 4554 conditions per place. [2024-06-27 19:30:34,549 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 375 selfloop transitions, 98 changer transitions 0/481 dead transitions. [2024-06-27 19:30:34,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 481 transitions, 7074 flow [2024-06-27 19:30:34,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:30:34,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:30:34,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 19:30:34,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-27 19:30:34,550 INFO L175 Difference]: Start difference. First operand has 392 places, 464 transitions, 6026 flow. Second operand 7 states and 167 transitions. [2024-06-27 19:30:34,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 481 transitions, 7074 flow [2024-06-27 19:30:39,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 481 transitions, 6839 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 19:30:39,076 INFO L231 Difference]: Finished difference. Result has 392 places, 466 transitions, 6062 flow [2024-06-27 19:30:39,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5791, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6062, PETRI_PLACES=392, PETRI_TRANSITIONS=466} [2024-06-27 19:30:39,076 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 350 predicate places. [2024-06-27 19:30:39,077 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 466 transitions, 6062 flow [2024-06-27 19:30:39,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:39,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:39,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:30:39,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 19:30:39,077 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 19:30:39,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:39,078 INFO L85 PathProgramCache]: Analyzing trace with hash 590526605, now seen corresponding path program 2 times [2024-06-27 19:30:39,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:39,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691394517] [2024-06-27 19:30:39,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:39,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:39,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:39,149 INFO 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 19:30:39,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:39,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691394517] [2024-06-27 19:30:39,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691394517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:39,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:39,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:30:39,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983893444] [2024-06-27 19:30:39,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:39,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:30:39,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:39,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:30:39,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:30:39,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:30:39,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 466 transitions, 6062 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:39,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:39,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:30:39,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:30:40,398 INFO L124 PetriNetUnfolderBase]: 3107/5315 cut-off events. [2024-06-27 19:30:40,398 INFO L125 PetriNetUnfolderBase]: For 781313/781313 co-relation queries the response was YES. [2024-06-27 19:30:40,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36948 conditions, 5315 events. 3107/5315 cut-off events. For 781313/781313 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 36221 event pairs, 702 based on Foata normal form. 2/5309 useless extension candidates. Maximal degree in co-relation 36763. Up to 4546 conditions per place. [2024-06-27 19:30:40,462 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 376 selfloop transitions, 100 changer transitions 0/484 dead transitions. [2024-06-27 19:30:40,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 484 transitions, 7122 flow [2024-06-27 19:30:40,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:30:40,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:30:40,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 19:30:40,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-27 19:30:40,463 INFO L175 Difference]: Start difference. First operand has 392 places, 466 transitions, 6062 flow. Second operand 7 states and 167 transitions. [2024-06-27 19:30:40,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 484 transitions, 7122 flow [2024-06-27 19:30:44,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 484 transitions, 6867 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 19:30:44,543 INFO L231 Difference]: Finished difference. Result has 394 places, 468 transitions, 6086 flow [2024-06-27 19:30:44,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5807, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6086, PETRI_PLACES=394, PETRI_TRANSITIONS=468} [2024-06-27 19:30:44,543 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-27 19:30:44,544 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 468 transitions, 6086 flow [2024-06-27 19:30:44,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:44,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:44,544 INFO 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 19:30:44,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 19:30:44,544 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 19:30:44,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:44,544 INFO L85 PathProgramCache]: Analyzing trace with hash -36367661, now seen corresponding path program 15 times [2024-06-27 19:30:44,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:44,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459718623] [2024-06-27 19:30:44,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:44,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:44,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:44,636 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 19:30:44,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:44,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459718623] [2024-06-27 19:30:44,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459718623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:44,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:44,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:30:44,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020040077] [2024-06-27 19:30:44,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:44,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:30:44,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:44,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:30:44,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:30:44,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:30:44,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 468 transitions, 6086 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:44,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:44,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:30:44,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:30:45,845 INFO L124 PetriNetUnfolderBase]: 3084/5299 cut-off events. [2024-06-27 19:30:45,845 INFO L125 PetriNetUnfolderBase]: For 776408/776408 co-relation queries the response was YES. [2024-06-27 19:30:45,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35489 conditions, 5299 events. 3084/5299 cut-off events. For 776408/776408 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 36221 event pairs, 640 based on Foata normal form. 10/5304 useless extension candidates. Maximal degree in co-relation 35303. Up to 4423 conditions per place. [2024-06-27 19:30:46,016 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 405 selfloop transitions, 91 changer transitions 0/504 dead transitions. [2024-06-27 19:30:46,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 504 transitions, 7190 flow [2024-06-27 19:30:46,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:30:46,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:30:46,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-27 19:30:46,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.649390243902439 [2024-06-27 19:30:46,018 INFO L175 Difference]: Start difference. First operand has 394 places, 468 transitions, 6086 flow. Second operand 8 states and 213 transitions. [2024-06-27 19:30:46,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 504 transitions, 7190 flow [2024-06-27 19:30:49,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 504 transitions, 6905 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-27 19:30:49,245 INFO L231 Difference]: Finished difference. Result has 397 places, 468 transitions, 5998 flow [2024-06-27 19:30:49,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5801, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5998, PETRI_PLACES=397, PETRI_TRANSITIONS=468} [2024-06-27 19:30:49,246 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-27 19:30:49,246 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 468 transitions, 5998 flow [2024-06-27 19:30:49,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:49,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:49,246 INFO 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 19:30:49,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 19:30:49,247 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 19:30:49,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:49,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1320492997, now seen corresponding path program 16 times [2024-06-27 19:30:49,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:49,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811093697] [2024-06-27 19:30:49,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:49,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:30:49,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:49,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811093697] [2024-06-27 19:30:49,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811093697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:49,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:49,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:30:49,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904686810] [2024-06-27 19:30:49,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:49,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:30:49,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:49,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:30:49,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:30:49,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:30:49,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 468 transitions, 5998 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:49,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:49,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:30:49,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:30:50,488 INFO L124 PetriNetUnfolderBase]: 3061/5259 cut-off events. [2024-06-27 19:30:50,488 INFO L125 PetriNetUnfolderBase]: For 698657/698657 co-relation queries the response was YES. [2024-06-27 19:30:50,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33790 conditions, 5259 events. 3061/5259 cut-off events. For 698657/698657 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 35980 event pairs, 655 based on Foata normal form. 10/5263 useless extension candidates. Maximal degree in co-relation 33603. Up to 4488 conditions per place. [2024-06-27 19:30:50,687 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 409 selfloop transitions, 78 changer transitions 0/495 dead transitions. [2024-06-27 19:30:50,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 495 transitions, 7052 flow [2024-06-27 19:30:50,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:30:50,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:30:50,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 19:30:50,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6411149825783972 [2024-06-27 19:30:50,688 INFO L175 Difference]: Start difference. First operand has 397 places, 468 transitions, 5998 flow. Second operand 7 states and 184 transitions. [2024-06-27 19:30:50,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 495 transitions, 7052 flow [2024-06-27 19:30:54,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 495 transitions, 6854 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 19:30:54,425 INFO L231 Difference]: Finished difference. Result has 397 places, 468 transitions, 5965 flow [2024-06-27 19:30:54,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5800, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5965, PETRI_PLACES=397, PETRI_TRANSITIONS=468} [2024-06-27 19:30:54,426 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-27 19:30:54,426 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 468 transitions, 5965 flow [2024-06-27 19:30:54,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:54,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:54,426 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] [2024-06-27 19:30:54,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 19:30:54,426 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 19:30:54,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:54,426 INFO L85 PathProgramCache]: Analyzing trace with hash 229656049, now seen corresponding path program 17 times [2024-06-27 19:30:54,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:54,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292462724] [2024-06-27 19:30:54,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:54,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:54,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:54,493 INFO 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 19:30:54,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:54,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292462724] [2024-06-27 19:30:54,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292462724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:54,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:54,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:30:54,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245929831] [2024-06-27 19:30:54,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:54,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:30:54,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:54,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:30:54,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:30:54,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:30:54,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 468 transitions, 5965 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:54,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:54,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:30:54,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:30:55,593 INFO L124 PetriNetUnfolderBase]: 3031/5226 cut-off events. [2024-06-27 19:30:55,593 INFO L125 PetriNetUnfolderBase]: For 602688/602688 co-relation queries the response was YES. [2024-06-27 19:30:55,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31979 conditions, 5226 events. 3031/5226 cut-off events. For 602688/602688 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 35843 event pairs, 542 based on Foata normal form. 10/5230 useless extension candidates. Maximal degree in co-relation 31792. Up to 3973 conditions per place. [2024-06-27 19:30:55,657 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 403 selfloop transitions, 90 changer transitions 0/501 dead transitions. [2024-06-27 19:30:55,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 501 transitions, 7067 flow [2024-06-27 19:30:55,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:30:55,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:30:55,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-27 19:30:55,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-27 19:30:55,658 INFO L175 Difference]: Start difference. First operand has 397 places, 468 transitions, 5965 flow. Second operand 7 states and 189 transitions. [2024-06-27 19:30:55,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 501 transitions, 7067 flow [2024-06-27 19:30:59,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 501 transitions, 6878 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 19:30:59,127 INFO L231 Difference]: Finished difference. Result has 398 places, 468 transitions, 5967 flow [2024-06-27 19:30:59,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5776, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5967, PETRI_PLACES=398, PETRI_TRANSITIONS=468} [2024-06-27 19:30:59,127 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 356 predicate places. [2024-06-27 19:30:59,127 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 468 transitions, 5967 flow [2024-06-27 19:30:59,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:59,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:30:59,128 INFO 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 19:30:59,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 19:30:59,128 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 19:30:59,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:30:59,128 INFO L85 PathProgramCache]: Analyzing trace with hash 391913707, now seen corresponding path program 3 times [2024-06-27 19:30:59,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:30:59,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137842830] [2024-06-27 19:30:59,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:30:59,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:30:59,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:30:59,251 INFO 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 19:30:59,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:30:59,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137842830] [2024-06-27 19:30:59,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137842830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:30:59,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:30:59,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:30:59,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096052681] [2024-06-27 19:30:59,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:30:59,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:30:59,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:30:59,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:30:59,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:30:59,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:30:59,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 468 transitions, 5967 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:30:59,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:30:59,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:30:59,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:00,301 INFO L124 PetriNetUnfolderBase]: 3039/5242 cut-off events. [2024-06-27 19:31:00,302 INFO L125 PetriNetUnfolderBase]: For 544082/544082 co-relation queries the response was YES. [2024-06-27 19:31:00,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32238 conditions, 5242 events. 3039/5242 cut-off events. For 544082/544082 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 36008 event pairs, 652 based on Foata normal form. 2/5238 useless extension candidates. Maximal degree in co-relation 32050. Up to 4504 conditions per place. [2024-06-27 19:31:00,370 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 407 selfloop transitions, 76 changer transitions 0/491 dead transitions. [2024-06-27 19:31:00,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 491 transitions, 7059 flow [2024-06-27 19:31:00,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:31:00,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:31:00,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 19:31:00,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-27 19:31:00,371 INFO L175 Difference]: Start difference. First operand has 398 places, 468 transitions, 5967 flow. Second operand 7 states and 177 transitions. [2024-06-27 19:31:00,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 491 transitions, 7059 flow [2024-06-27 19:31:03,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 491 transitions, 6770 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 19:31:03,344 INFO L231 Difference]: Finished difference. Result has 397 places, 470 transitions, 5913 flow [2024-06-27 19:31:03,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5678, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5913, PETRI_PLACES=397, PETRI_TRANSITIONS=470} [2024-06-27 19:31:03,344 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-27 19:31:03,344 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 470 transitions, 5913 flow [2024-06-27 19:31:03,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:03,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:03,344 INFO 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 19:31:03,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 19:31:03,345 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 19:31:03,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:03,345 INFO L85 PathProgramCache]: Analyzing trace with hash 407150827, now seen corresponding path program 4 times [2024-06-27 19:31:03,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:03,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140519754] [2024-06-27 19:31:03,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:03,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:03,411 INFO 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 19:31:03,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:03,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140519754] [2024-06-27 19:31:03,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140519754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:03,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:03,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:31:03,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32958644] [2024-06-27 19:31:03,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:03,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:31:03,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:03,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:31:03,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:31:03,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:03,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 470 transitions, 5913 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:03,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:03,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:03,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:04,615 INFO L124 PetriNetUnfolderBase]: 3093/5324 cut-off events. [2024-06-27 19:31:04,616 INFO L125 PetriNetUnfolderBase]: For 625683/625683 co-relation queries the response was YES. [2024-06-27 19:31:04,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33947 conditions, 5324 events. 3093/5324 cut-off events. For 625683/625683 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 36554 event pairs, 662 based on Foata normal form. 2/5320 useless extension candidates. Maximal degree in co-relation 33758. Up to 4456 conditions per place. [2024-06-27 19:31:04,682 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 408 selfloop transitions, 83 changer transitions 0/499 dead transitions. [2024-06-27 19:31:04,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 499 transitions, 7385 flow [2024-06-27 19:31:04,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:31:04,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:31:04,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 19:31:04,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-27 19:31:04,683 INFO L175 Difference]: Start difference. First operand has 397 places, 470 transitions, 5913 flow. Second operand 7 states and 181 transitions. [2024-06-27 19:31:04,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 499 transitions, 7385 flow [2024-06-27 19:31:08,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 499 transitions, 7166 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 19:31:08,150 INFO L231 Difference]: Finished difference. Result has 399 places, 474 transitions, 6026 flow [2024-06-27 19:31:08,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5694, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6026, PETRI_PLACES=399, PETRI_TRANSITIONS=474} [2024-06-27 19:31:08,151 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 357 predicate places. [2024-06-27 19:31:08,151 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 474 transitions, 6026 flow [2024-06-27 19:31:08,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:08,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:08,151 INFO 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 19:31:08,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 19:31:08,151 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 19:31:08,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:08,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1313440177, now seen corresponding path program 5 times [2024-06-27 19:31:08,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:08,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205076052] [2024-06-27 19:31:08,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:08,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:08,228 INFO 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 19:31:08,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:08,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205076052] [2024-06-27 19:31:08,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205076052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:08,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:08,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:31:08,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385276570] [2024-06-27 19:31:08,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:08,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:31:08,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:08,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:31:08,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:31:08,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:08,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 474 transitions, 6026 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:08,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:08,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:08,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:09,571 INFO L124 PetriNetUnfolderBase]: 3088/5328 cut-off events. [2024-06-27 19:31:09,571 INFO L125 PetriNetUnfolderBase]: For 617023/617023 co-relation queries the response was YES. [2024-06-27 19:31:09,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33691 conditions, 5328 events. 3088/5328 cut-off events. For 617023/617023 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 36607 event pairs, 645 based on Foata normal form. 2/5325 useless extension candidates. Maximal degree in co-relation 33501. Up to 4531 conditions per place. [2024-06-27 19:31:09,639 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 412 selfloop transitions, 87 changer transitions 1/508 dead transitions. [2024-06-27 19:31:09,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 508 transitions, 7170 flow [2024-06-27 19:31:09,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:31:09,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:31:09,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-27 19:31:09,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6432926829268293 [2024-06-27 19:31:09,640 INFO L175 Difference]: Start difference. First operand has 399 places, 474 transitions, 6026 flow. Second operand 8 states and 211 transitions. [2024-06-27 19:31:09,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 508 transitions, 7170 flow [2024-06-27 19:31:13,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 508 transitions, 6998 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-27 19:31:13,321 INFO L231 Difference]: Finished difference. Result has 404 places, 475 transitions, 6093 flow [2024-06-27 19:31:13,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5858, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6093, PETRI_PLACES=404, PETRI_TRANSITIONS=475} [2024-06-27 19:31:13,322 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-27 19:31:13,322 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 475 transitions, 6093 flow [2024-06-27 19:31:13,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:13,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:13,322 INFO 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 19:31:13,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 19:31:13,323 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 19:31:13,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:13,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1685829625, now seen corresponding path program 6 times [2024-06-27 19:31:13,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:13,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725058482] [2024-06-27 19:31:13,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:13,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:13,391 INFO 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 19:31:13,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:13,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725058482] [2024-06-27 19:31:13,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725058482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:13,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:13,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:31:13,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203394697] [2024-06-27 19:31:13,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:13,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:31:13,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:13,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:31:13,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:31:13,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:13,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 475 transitions, 6093 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:13,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:13,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:13,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:14,492 INFO L124 PetriNetUnfolderBase]: 3129/5387 cut-off events. [2024-06-27 19:31:14,492 INFO L125 PetriNetUnfolderBase]: For 680432/680432 co-relation queries the response was YES. [2024-06-27 19:31:14,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35198 conditions, 5387 events. 3129/5387 cut-off events. For 680432/680432 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 37051 event pairs, 520 based on Foata normal form. 2/5384 useless extension candidates. Maximal degree in co-relation 35006. Up to 3981 conditions per place. [2024-06-27 19:31:14,566 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 405 selfloop transitions, 105 changer transitions 1/519 dead transitions. [2024-06-27 19:31:14,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 519 transitions, 7634 flow [2024-06-27 19:31:14,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:31:14,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:31:14,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-27 19:31:14,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6615853658536586 [2024-06-27 19:31:14,566 INFO L175 Difference]: Start difference. First operand has 404 places, 475 transitions, 6093 flow. Second operand 8 states and 217 transitions. [2024-06-27 19:31:14,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 519 transitions, 7634 flow [2024-06-27 19:31:18,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 519 transitions, 7407 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 19:31:18,497 INFO L231 Difference]: Finished difference. Result has 407 places, 479 transitions, 6254 flow [2024-06-27 19:31:18,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5866, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6254, PETRI_PLACES=407, PETRI_TRANSITIONS=479} [2024-06-27 19:31:18,497 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 365 predicate places. [2024-06-27 19:31:18,498 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 479 transitions, 6254 flow [2024-06-27 19:31:18,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:18,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:18,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:18,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 19:31:18,498 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 19:31:18,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:18,498 INFO L85 PathProgramCache]: Analyzing trace with hash 17018219, now seen corresponding path program 7 times [2024-06-27 19:31:18,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:18,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21613567] [2024-06-27 19:31:18,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:18,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:18,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:18,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:18,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21613567] [2024-06-27 19:31:18,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21613567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:18,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:18,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:31:18,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147499308] [2024-06-27 19:31:18,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:18,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:31:18,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:18,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:31:18,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:31:18,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:18,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 479 transitions, 6254 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:18,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:18,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:18,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:19,736 INFO L124 PetriNetUnfolderBase]: 3284/5665 cut-off events. [2024-06-27 19:31:19,736 INFO L125 PetriNetUnfolderBase]: For 972017/972017 co-relation queries the response was YES. [2024-06-27 19:31:19,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41307 conditions, 5665 events. 3284/5665 cut-off events. For 972017/972017 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 39171 event pairs, 545 based on Foata normal form. 2/5661 useless extension candidates. Maximal degree in co-relation 41113. Up to 3408 conditions per place. [2024-06-27 19:31:19,812 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 407 selfloop transitions, 102 changer transitions 0/517 dead transitions. [2024-06-27 19:31:19,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 517 transitions, 8131 flow [2024-06-27 19:31:19,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:31:19,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:31:19,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-27 19:31:19,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6550522648083623 [2024-06-27 19:31:19,813 INFO L175 Difference]: Start difference. First operand has 407 places, 479 transitions, 6254 flow. Second operand 7 states and 188 transitions. [2024-06-27 19:31:19,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 517 transitions, 8131 flow [2024-06-27 19:31:25,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 517 transitions, 7951 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-27 19:31:25,195 INFO L231 Difference]: Finished difference. Result has 411 places, 485 transitions, 6564 flow [2024-06-27 19:31:25,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6074, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6564, PETRI_PLACES=411, PETRI_TRANSITIONS=485} [2024-06-27 19:31:25,196 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 369 predicate places. [2024-06-27 19:31:25,196 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 485 transitions, 6564 flow [2024-06-27 19:31:25,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:25,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:25,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:25,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 19:31:25,197 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 19:31:25,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:25,197 INFO L85 PathProgramCache]: Analyzing trace with hash 16838729, now seen corresponding path program 8 times [2024-06-27 19:31:25,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:25,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853271259] [2024-06-27 19:31:25,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:25,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:25,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:25,273 INFO 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 19:31:25,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:25,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853271259] [2024-06-27 19:31:25,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853271259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:25,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:25,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:31:25,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449587684] [2024-06-27 19:31:25,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:25,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:31:25,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:25,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:31:25,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:31:25,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:25,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 485 transitions, 6564 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:25,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:25,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:25,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:26,445 INFO L124 PetriNetUnfolderBase]: 3279/5658 cut-off events. [2024-06-27 19:31:26,445 INFO L125 PetriNetUnfolderBase]: For 970139/970139 co-relation queries the response was YES. [2024-06-27 19:31:26,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41793 conditions, 5658 events. 3279/5658 cut-off events. For 970139/970139 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 39167 event pairs, 533 based on Foata normal form. 2/5654 useless extension candidates. Maximal degree in co-relation 41596. Up to 3406 conditions per place. [2024-06-27 19:31:26,717 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 407 selfloop transitions, 104 changer transitions 0/519 dead transitions. [2024-06-27 19:31:26,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 519 transitions, 8301 flow [2024-06-27 19:31:26,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:31:26,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:31:26,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-27 19:31:26,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-27 19:31:26,718 INFO L175 Difference]: Start difference. First operand has 411 places, 485 transitions, 6564 flow. Second operand 7 states and 189 transitions. [2024-06-27 19:31:26,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 519 transitions, 8301 flow [2024-06-27 19:31:32,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 519 transitions, 8127 flow, removed 53 selfloop flow, removed 2 redundant places. [2024-06-27 19:31:32,106 INFO L231 Difference]: Finished difference. Result has 416 places, 486 transitions, 6662 flow [2024-06-27 19:31:32,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6396, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6662, PETRI_PLACES=416, PETRI_TRANSITIONS=486} [2024-06-27 19:31:32,106 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 374 predicate places. [2024-06-27 19:31:32,107 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 486 transitions, 6662 flow [2024-06-27 19:31:32,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:32,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:32,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:31:32,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 19:31:32,107 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 19:31:32,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:32,108 INFO L85 PathProgramCache]: Analyzing trace with hash -163897715, now seen corresponding path program 1 times [2024-06-27 19:31:32,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:32,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155262839] [2024-06-27 19:31:32,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:32,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:32,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:32,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:31:32,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:32,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155262839] [2024-06-27 19:31:32,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155262839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:32,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:32,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:31:32,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870213996] [2024-06-27 19:31:32,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:32,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:31:32,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:32,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:31:32,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:31:32,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:32,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 486 transitions, 6662 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:32,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:32,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:32,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:33,713 INFO L124 PetriNetUnfolderBase]: 3359/5772 cut-off events. [2024-06-27 19:31:33,713 INFO L125 PetriNetUnfolderBase]: For 1099344/1099344 co-relation queries the response was YES. [2024-06-27 19:31:33,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44964 conditions, 5772 events. 3359/5772 cut-off events. For 1099344/1099344 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 39940 event pairs, 610 based on Foata normal form. 2/5758 useless extension candidates. Maximal degree in co-relation 44765. Up to 4524 conditions per place. [2024-06-27 19:31:33,799 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 477 selfloop transitions, 49 changer transitions 4/538 dead transitions. [2024-06-27 19:31:33,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 538 transitions, 8654 flow [2024-06-27 19:31:33,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:31:33,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:31:33,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-27 19:31:33,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-27 19:31:33,800 INFO L175 Difference]: Start difference. First operand has 416 places, 486 transitions, 6662 flow. Second operand 9 states and 231 transitions. [2024-06-27 19:31:33,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 538 transitions, 8654 flow [2024-06-27 19:31:38,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 538 transitions, 8280 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 19:31:38,682 INFO L231 Difference]: Finished difference. Result has 420 places, 491 transitions, 6590 flow [2024-06-27 19:31:38,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6288, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6590, PETRI_PLACES=420, PETRI_TRANSITIONS=491} [2024-06-27 19:31:38,683 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-27 19:31:38,683 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 491 transitions, 6590 flow [2024-06-27 19:31:38,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:38,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:38,684 INFO L208 CegarLoopForPetriNet]: trace 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 19:31:38,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 19:31:38,684 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 19:31:38,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:38,684 INFO L85 PathProgramCache]: Analyzing trace with hash 2056444241, now seen corresponding path program 2 times [2024-06-27 19:31:38,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:38,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728661972] [2024-06-27 19:31:38,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:38,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:38,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:38,783 INFO 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 19:31:38,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:38,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728661972] [2024-06-27 19:31:38,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728661972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:38,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:38,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:31:38,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858261832] [2024-06-27 19:31:38,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:38,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:31:38,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:38,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:31:38,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:31:38,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:38,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 491 transitions, 6590 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:38,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:38,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:38,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:40,098 INFO L124 PetriNetUnfolderBase]: 3387/5821 cut-off events. [2024-06-27 19:31:40,099 INFO L125 PetriNetUnfolderBase]: For 1146462/1146462 co-relation queries the response was YES. [2024-06-27 19:31:40,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45078 conditions, 5821 events. 3387/5821 cut-off events. For 1146462/1146462 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 40363 event pairs, 638 based on Foata normal form. 2/5820 useless extension candidates. Maximal degree in co-relation 44879. Up to 5107 conditions per place. [2024-06-27 19:31:40,181 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 489 selfloop transitions, 30 changer transitions 2/529 dead transitions. [2024-06-27 19:31:40,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 529 transitions, 8038 flow [2024-06-27 19:31:40,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:31:40,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:31:40,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-27 19:31:40,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-27 19:31:40,182 INFO L175 Difference]: Start difference. First operand has 420 places, 491 transitions, 6590 flow. Second operand 9 states and 216 transitions. [2024-06-27 19:31:40,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 529 transitions, 8038 flow [2024-06-27 19:31:46,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 529 transitions, 7848 flow, removed 78 selfloop flow, removed 3 redundant places. [2024-06-27 19:31:46,823 INFO L231 Difference]: Finished difference. Result has 427 places, 492 transitions, 6497 flow [2024-06-27 19:31:46,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6408, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6497, PETRI_PLACES=427, PETRI_TRANSITIONS=492} [2024-06-27 19:31:46,824 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-27 19:31:46,824 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 492 transitions, 6497 flow [2024-06-27 19:31:46,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:46,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:46,824 INFO L208 CegarLoopForPetriNet]: trace 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 19:31:46,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-27 19:31:46,825 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 19:31:46,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:46,825 INFO L85 PathProgramCache]: Analyzing trace with hash 501301585, now seen corresponding path program 3 times [2024-06-27 19:31:46,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:46,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455217622] [2024-06-27 19:31:46,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:46,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:46,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:46,901 INFO 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 19:31:46,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:46,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455217622] [2024-06-27 19:31:46,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455217622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:46,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:46,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:31:46,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943968751] [2024-06-27 19:31:46,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:46,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:31:46,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:46,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:31:46,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:31:46,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:46,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 492 transitions, 6497 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:46,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:46,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:46,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:48,326 INFO L124 PetriNetUnfolderBase]: 3395/5839 cut-off events. [2024-06-27 19:31:48,326 INFO L125 PetriNetUnfolderBase]: For 1165733/1165733 co-relation queries the response was YES. [2024-06-27 19:31:48,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45056 conditions, 5839 events. 3395/5839 cut-off events. For 1165733/1165733 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 40496 event pairs, 810 based on Foata normal form. 2/5836 useless extension candidates. Maximal degree in co-relation 44854. Up to 5131 conditions per place. [2024-06-27 19:31:48,404 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 481 selfloop transitions, 44 changer transitions 2/535 dead transitions. [2024-06-27 19:31:48,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 535 transitions, 8095 flow [2024-06-27 19:31:48,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:31:48,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:31:48,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-27 19:31:48,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6043360433604336 [2024-06-27 19:31:48,405 INFO L175 Difference]: Start difference. First operand has 427 places, 492 transitions, 6497 flow. Second operand 9 states and 223 transitions. [2024-06-27 19:31:48,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 535 transitions, 8095 flow [2024-06-27 19:31:54,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 535 transitions, 7974 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-27 19:31:54,194 INFO L231 Difference]: Finished difference. Result has 427 places, 496 transitions, 6633 flow [2024-06-27 19:31:54,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6376, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6633, PETRI_PLACES=427, PETRI_TRANSITIONS=496} [2024-06-27 19:31:54,194 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-27 19:31:54,194 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 496 transitions, 6633 flow [2024-06-27 19:31:54,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:54,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:31:54,194 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 19:31:54,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-27 19:31:54,194 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 19:31:54,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:31:54,195 INFO L85 PathProgramCache]: Analyzing trace with hash -130475539, now seen corresponding path program 4 times [2024-06-27 19:31:54,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:31:54,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319590803] [2024-06-27 19:31:54,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:31:54,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:31:54,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:31:54,278 INFO 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 19:31:54,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:31:54,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319590803] [2024-06-27 19:31:54,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319590803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:31:54,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:31:54,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:31:54,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060272523] [2024-06-27 19:31:54,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:31:54,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:31:54,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:31:54,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:31:54,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:31:54,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:31:54,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 496 transitions, 6633 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:31:54,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:31:54,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:31:54,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:31:55,756 INFO L124 PetriNetUnfolderBase]: 3390/5834 cut-off events. [2024-06-27 19:31:55,756 INFO L125 PetriNetUnfolderBase]: For 1162179/1162179 co-relation queries the response was YES. [2024-06-27 19:31:55,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44668 conditions, 5834 events. 3390/5834 cut-off events. For 1162179/1162179 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 40390 event pairs, 813 based on Foata normal form. 2/5833 useless extension candidates. Maximal degree in co-relation 44465. Up to 5183 conditions per place. [2024-06-27 19:31:55,834 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 480 selfloop transitions, 40 changer transitions 0/528 dead transitions. [2024-06-27 19:31:55,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 528 transitions, 7753 flow [2024-06-27 19:31:55,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:31:55,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:31:55,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-27 19:31:55,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2024-06-27 19:31:55,835 INFO L175 Difference]: Start difference. First operand has 427 places, 496 transitions, 6633 flow. Second operand 9 states and 215 transitions. [2024-06-27 19:31:55,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 528 transitions, 7753 flow [2024-06-27 19:32:03,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 528 transitions, 7568 flow, removed 68 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:03,073 INFO L231 Difference]: Finished difference. Result has 431 places, 496 transitions, 6533 flow [2024-06-27 19:32:03,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6448, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6533, PETRI_PLACES=431, PETRI_TRANSITIONS=496} [2024-06-27 19:32:03,073 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-27 19:32:03,074 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 496 transitions, 6533 flow [2024-06-27 19:32:03,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:03,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:03,074 INFO L208 CegarLoopForPetriNet]: trace 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 19:32:03,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-27 19:32:03,074 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 19:32:03,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:03,074 INFO L85 PathProgramCache]: Analyzing trace with hash -134189494, now seen corresponding path program 1 times [2024-06-27 19:32:03,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:03,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585743310] [2024-06-27 19:32:03,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:03,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:03,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:03,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:03,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:03,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585743310] [2024-06-27 19:32:03,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585743310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:03,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:03,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:03,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433266631] [2024-06-27 19:32:03,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:03,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:03,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:03,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:03,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:03,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:03,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 496 transitions, 6533 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:03,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:03,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:03,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:04,559 INFO L124 PetriNetUnfolderBase]: 3387/5821 cut-off events. [2024-06-27 19:32:04,559 INFO L125 PetriNetUnfolderBase]: For 1155405/1155405 co-relation queries the response was YES. [2024-06-27 19:32:04,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44436 conditions, 5821 events. 3387/5821 cut-off events. For 1155405/1155405 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 40332 event pairs, 832 based on Foata normal form. 1/5816 useless extension candidates. Maximal degree in co-relation 44231. Up to 4943 conditions per place. [2024-06-27 19:32:04,640 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 381 selfloop transitions, 125 changer transitions 0/514 dead transitions. [2024-06-27 19:32:04,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 514 transitions, 7871 flow [2024-06-27 19:32:04,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:04,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:04,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 19:32:04,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-27 19:32:04,641 INFO L175 Difference]: Start difference. First operand has 431 places, 496 transitions, 6533 flow. Second operand 7 states and 178 transitions. [2024-06-27 19:32:04,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 514 transitions, 7871 flow [2024-06-27 19:32:12,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 514 transitions, 7771 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 19:32:12,873 INFO L231 Difference]: Finished difference. Result has 430 places, 496 transitions, 6697 flow [2024-06-27 19:32:12,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6433, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6697, PETRI_PLACES=430, PETRI_TRANSITIONS=496} [2024-06-27 19:32:12,874 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 388 predicate places. [2024-06-27 19:32:12,874 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 496 transitions, 6697 flow [2024-06-27 19:32:12,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:12,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:12,874 INFO L208 CegarLoopForPetriNet]: trace 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 19:32:12,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-27 19:32:12,874 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 19:32:12,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:12,874 INFO L85 PathProgramCache]: Analyzing trace with hash 819146104, now seen corresponding path program 2 times [2024-06-27 19:32:12,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:12,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051115877] [2024-06-27 19:32:12,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:12,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:13,027 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 19:32:13,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:13,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051115877] [2024-06-27 19:32:13,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051115877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:13,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:13,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:13,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606053803] [2024-06-27 19:32:13,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:13,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:13,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:13,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:13,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:13,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:13,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 496 transitions, 6697 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:13,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:13,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:13,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:14,389 INFO L124 PetriNetUnfolderBase]: 3392/5830 cut-off events. [2024-06-27 19:32:14,390 INFO L125 PetriNetUnfolderBase]: For 1172129/1172129 co-relation queries the response was YES. [2024-06-27 19:32:14,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44799 conditions, 5830 events. 3392/5830 cut-off events. For 1172129/1172129 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 40435 event pairs, 832 based on Foata normal form. 1/5825 useless extension candidates. Maximal degree in co-relation 44593. Up to 4949 conditions per place. [2024-06-27 19:32:14,477 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 376 selfloop transitions, 136 changer transitions 0/520 dead transitions. [2024-06-27 19:32:14,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 520 transitions, 8100 flow [2024-06-27 19:32:14,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:32:14,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:32:14,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-27 19:32:14,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902439024390244 [2024-06-27 19:32:14,478 INFO L175 Difference]: Start difference. First operand has 430 places, 496 transitions, 6697 flow. Second operand 10 states and 242 transitions. [2024-06-27 19:32:14,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 520 transitions, 8100 flow [2024-06-27 19:32:21,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 520 transitions, 7830 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:21,015 INFO L231 Difference]: Finished difference. Result has 434 places, 499 transitions, 6757 flow [2024-06-27 19:32:21,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6435, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6757, PETRI_PLACES=434, PETRI_TRANSITIONS=499} [2024-06-27 19:32:21,016 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 392 predicate places. [2024-06-27 19:32:21,016 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 499 transitions, 6757 flow [2024-06-27 19:32:21,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:21,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:21,017 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 19:32:21,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-27 19:32:21,017 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 19:32:21,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:21,018 INFO L85 PathProgramCache]: Analyzing trace with hash 819140524, now seen corresponding path program 3 times [2024-06-27 19:32:21,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:21,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731556862] [2024-06-27 19:32:21,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:21,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:21,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:21,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:21,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:21,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731556862] [2024-06-27 19:32:21,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731556862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:21,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:21,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:21,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066340248] [2024-06-27 19:32:21,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:21,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:21,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:21,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:21,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:21,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:21,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 499 transitions, 6757 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:21,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:21,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:21,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:22,656 INFO L124 PetriNetUnfolderBase]: 3389/5826 cut-off events. [2024-06-27 19:32:22,656 INFO L125 PetriNetUnfolderBase]: For 1161824/1161824 co-relation queries the response was YES. [2024-06-27 19:32:22,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44664 conditions, 5826 events. 3389/5826 cut-off events. For 1161824/1161824 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 40444 event pairs, 832 based on Foata normal form. 1/5821 useless extension candidates. Maximal degree in co-relation 44458. Up to 4946 conditions per place. [2024-06-27 19:32:22,747 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 380 selfloop transitions, 129 changer transitions 0/517 dead transitions. [2024-06-27 19:32:22,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 517 transitions, 7819 flow [2024-06-27 19:32:22,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:22,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:22,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 19:32:22,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-27 19:32:22,748 INFO L175 Difference]: Start difference. First operand has 434 places, 499 transitions, 6757 flow. Second operand 8 states and 199 transitions. [2024-06-27 19:32:22,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 517 transitions, 7819 flow [2024-06-27 19:32:28,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 517 transitions, 7486 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-27 19:32:28,915 INFO L231 Difference]: Finished difference. Result has 432 places, 499 transitions, 6697 flow [2024-06-27 19:32:28,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6424, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6697, PETRI_PLACES=432, PETRI_TRANSITIONS=499} [2024-06-27 19:32:28,915 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-27 19:32:28,915 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 499 transitions, 6697 flow [2024-06-27 19:32:28,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:28,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:28,916 INFO L208 CegarLoopForPetriNet]: trace 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 19:32:28,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-27 19:32:28,916 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 19:32:28,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:28,916 INFO L85 PathProgramCache]: Analyzing trace with hash -703518179, now seen corresponding path program 5 times [2024-06-27 19:32:28,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:28,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704401215] [2024-06-27 19:32:28,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:28,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:29,090 INFO 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 19:32:29,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:29,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704401215] [2024-06-27 19:32:29,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704401215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:29,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:29,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:29,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538566576] [2024-06-27 19:32:29,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:29,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:29,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:29,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:29,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:29,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:29,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 499 transitions, 6697 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:29,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:29,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:29,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:30,538 INFO L124 PetriNetUnfolderBase]: 3456/5919 cut-off events. [2024-06-27 19:32:30,538 INFO L125 PetriNetUnfolderBase]: For 1285070/1285070 co-relation queries the response was YES. [2024-06-27 19:32:30,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47390 conditions, 5919 events. 3456/5919 cut-off events. For 1285070/1285070 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 40896 event pairs, 862 based on Foata normal form. 2/5903 useless extension candidates. Maximal degree in co-relation 47184. Up to 4679 conditions per place. [2024-06-27 19:32:30,627 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 275 selfloop transitions, 254 changer transitions 0/537 dead transitions. [2024-06-27 19:32:30,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 537 transitions, 8597 flow [2024-06-27 19:32:30,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:30,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:30,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-27 19:32:30,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6402439024390244 [2024-06-27 19:32:30,628 INFO L175 Difference]: Start difference. First operand has 432 places, 499 transitions, 6697 flow. Second operand 8 states and 210 transitions. [2024-06-27 19:32:30,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 537 transitions, 8597 flow [2024-06-27 19:32:37,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 537 transitions, 8324 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 19:32:37,361 INFO L231 Difference]: Finished difference. Result has 432 places, 503 transitions, 7117 flow [2024-06-27 19:32:37,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6428, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7117, PETRI_PLACES=432, PETRI_TRANSITIONS=503} [2024-06-27 19:32:37,362 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-27 19:32:37,362 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 503 transitions, 7117 flow [2024-06-27 19:32:37,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:37,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:37,362 INFO L208 CegarLoopForPetriNet]: trace 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 19:32:37,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-27 19:32:37,362 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 19:32:37,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:37,362 INFO L85 PathProgramCache]: Analyzing trace with hash -99045039, now seen corresponding path program 6 times [2024-06-27 19:32:37,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:37,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653721398] [2024-06-27 19:32:37,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:37,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:37,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:37,433 INFO 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 19:32:37,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:37,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653721398] [2024-06-27 19:32:37,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653721398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:37,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:37,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:37,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590123034] [2024-06-27 19:32:37,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:37,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:37,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:37,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:37,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:37,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:37,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 503 transitions, 7117 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:37,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:37,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:37,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:38,875 INFO L124 PetriNetUnfolderBase]: 3464/5936 cut-off events. [2024-06-27 19:32:38,875 INFO L125 PetriNetUnfolderBase]: For 1287755/1287755 co-relation queries the response was YES. [2024-06-27 19:32:38,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47993 conditions, 5936 events. 3464/5936 cut-off events. For 1287755/1287755 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 41049 event pairs, 869 based on Foata normal form. 2/5920 useless extension candidates. Maximal degree in co-relation 47787. Up to 4776 conditions per place. [2024-06-27 19:32:38,966 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 272 selfloop transitions, 251 changer transitions 0/531 dead transitions. [2024-06-27 19:32:38,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 531 transitions, 8601 flow [2024-06-27 19:32:38,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:38,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:38,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 19:32:38,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-27 19:32:38,967 INFO L175 Difference]: Start difference. First operand has 432 places, 503 transitions, 7117 flow. Second operand 8 states and 202 transitions. [2024-06-27 19:32:38,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 531 transitions, 8601 flow [2024-06-27 19:32:47,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 531 transitions, 7949 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:47,130 INFO L231 Difference]: Finished difference. Result has 434 places, 505 transitions, 7066 flow [2024-06-27 19:32:47,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6489, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7066, PETRI_PLACES=434, PETRI_TRANSITIONS=505} [2024-06-27 19:32:47,131 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 392 predicate places. [2024-06-27 19:32:47,131 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 505 transitions, 7066 flow [2024-06-27 19:32:47,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:47,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:47,131 INFO L208 CegarLoopForPetriNet]: trace 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 19:32:47,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-27 19:32:47,132 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 19:32:47,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:47,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1393755535, now seen corresponding path program 7 times [2024-06-27 19:32:47,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:47,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111280776] [2024-06-27 19:32:47,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:47,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:47,221 INFO 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 19:32:47,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:47,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111280776] [2024-06-27 19:32:47,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111280776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:47,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:47,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:47,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196599753] [2024-06-27 19:32:47,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:47,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:47,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:47,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:47,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:47,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:47,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 505 transitions, 7066 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:47,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:47,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:47,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:48,954 INFO L124 PetriNetUnfolderBase]: 3472/5948 cut-off events. [2024-06-27 19:32:48,954 INFO L125 PetriNetUnfolderBase]: For 1299633/1299633 co-relation queries the response was YES. [2024-06-27 19:32:49,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47775 conditions, 5948 events. 3472/5948 cut-off events. For 1299633/1299633 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 41171 event pairs, 869 based on Foata normal form. 2/5932 useless extension candidates. Maximal degree in co-relation 47569. Up to 4788 conditions per place. [2024-06-27 19:32:49,047 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 272 selfloop transitions, 250 changer transitions 0/530 dead transitions. [2024-06-27 19:32:49,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 530 transitions, 8522 flow [2024-06-27 19:32:49,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:49,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:49,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:32:49,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-27 19:32:49,048 INFO L175 Difference]: Start difference. First operand has 434 places, 505 transitions, 7066 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:32:49,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 530 transitions, 8522 flow [2024-06-27 19:32:56,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 530 transitions, 7965 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:56,020 INFO L231 Difference]: Finished difference. Result has 436 places, 507 transitions, 7088 flow [2024-06-27 19:32:56,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6509, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7088, PETRI_PLACES=436, PETRI_TRANSITIONS=507} [2024-06-27 19:32:56,020 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-27 19:32:56,020 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 507 transitions, 7088 flow [2024-06-27 19:32:56,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:56,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:56,021 INFO L208 CegarLoopForPetriNet]: trace 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 19:32:56,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-27 19:32:56,021 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 19:32:56,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:56,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1652876651, now seen corresponding path program 8 times [2024-06-27 19:32:56,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:56,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166926357] [2024-06-27 19:32:56,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:56,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:56,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:56,098 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 19:32:56,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:56,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166926357] [2024-06-27 19:32:56,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166926357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:56,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:56,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:56,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134607192] [2024-06-27 19:32:56,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:56,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:56,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:56,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:56,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:56,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:56,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 507 transitions, 7088 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:56,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:56,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:56,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:57,661 INFO L124 PetriNetUnfolderBase]: 3480/5972 cut-off events. [2024-06-27 19:32:57,661 INFO L125 PetriNetUnfolderBase]: For 1317222/1317222 co-relation queries the response was YES. [2024-06-27 19:32:57,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47994 conditions, 5972 events. 3480/5972 cut-off events. For 1317222/1317222 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 41403 event pairs, 827 based on Foata normal form. 2/5971 useless extension candidates. Maximal degree in co-relation 47787. Up to 5337 conditions per place. [2024-06-27 19:32:57,750 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 483 selfloop transitions, 39 changer transitions 0/530 dead transitions. [2024-06-27 19:32:57,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 530 transitions, 8266 flow [2024-06-27 19:32:57,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:32:57,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:32:57,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-27 19:32:57,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-06-27 19:32:57,751 INFO L175 Difference]: Start difference. First operand has 436 places, 507 transitions, 7088 flow. Second operand 9 states and 206 transitions. [2024-06-27 19:32:57,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 530 transitions, 8266 flow [2024-06-27 19:33:04,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 530 transitions, 7707 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 19:33:04,681 INFO L231 Difference]: Finished difference. Result has 439 places, 509 transitions, 6690 flow [2024-06-27 19:33:04,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6529, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6690, PETRI_PLACES=439, PETRI_TRANSITIONS=509} [2024-06-27 19:33:04,681 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 397 predicate places. [2024-06-27 19:33:04,681 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 509 transitions, 6690 flow [2024-06-27 19:33:04,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:04,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:04,681 INFO L208 CegarLoopForPetriNet]: trace 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 19:33:04,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-27 19:33:04,681 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 19:33:04,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:04,682 INFO L85 PathProgramCache]: Analyzing trace with hash -102758994, now seen corresponding path program 4 times [2024-06-27 19:33:04,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:04,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383705646] [2024-06-27 19:33:04,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:04,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:04,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:04,765 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 19:33:04,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:04,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383705646] [2024-06-27 19:33:04,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383705646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:04,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:04,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:04,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579935630] [2024-06-27 19:33:04,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:04,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:04,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:04,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:04,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:04,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:04,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 509 transitions, 6690 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:04,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:04,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:04,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:06,316 INFO L124 PetriNetUnfolderBase]: 3501/5980 cut-off events. [2024-06-27 19:33:06,316 INFO L125 PetriNetUnfolderBase]: For 1344244/1344244 co-relation queries the response was YES. [2024-06-27 19:33:06,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47887 conditions, 5980 events. 3501/5980 cut-off events. For 1344244/1344244 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 41414 event pairs, 924 based on Foata normal form. 1/5969 useless extension candidates. Maximal degree in co-relation 47679. Up to 4830 conditions per place. [2024-06-27 19:33:06,404 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 309 selfloop transitions, 224 changer transitions 0/541 dead transitions. [2024-06-27 19:33:06,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 541 transitions, 8513 flow [2024-06-27 19:33:06,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:06,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:06,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 19:33:06,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-27 19:33:06,405 INFO L175 Difference]: Start difference. First operand has 439 places, 509 transitions, 6690 flow. Second operand 8 states and 197 transitions. [2024-06-27 19:33:06,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 541 transitions, 8513 flow [2024-06-27 19:33:14,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 541 transitions, 8372 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-27 19:33:14,071 INFO L231 Difference]: Finished difference. Result has 440 places, 518 transitions, 7125 flow [2024-06-27 19:33:14,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6549, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7125, PETRI_PLACES=440, PETRI_TRANSITIONS=518} [2024-06-27 19:33:14,071 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 398 predicate places. [2024-06-27 19:33:14,072 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 518 transitions, 7125 flow [2024-06-27 19:33:14,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:14,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:14,072 INFO L208 CegarLoopForPetriNet]: trace 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 19:33:14,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-27 19:33:14,072 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 19:33:14,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:14,072 INFO L85 PathProgramCache]: Analyzing trace with hash -694936604, now seen corresponding path program 5 times [2024-06-27 19:33:14,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:14,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042803509] [2024-06-27 19:33:14,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:14,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:14,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:14,139 INFO 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 19:33:14,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:14,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042803509] [2024-06-27 19:33:14,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042803509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:14,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:14,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:14,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415484984] [2024-06-27 19:33:14,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:14,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:14,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:14,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:14,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:14,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:14,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 518 transitions, 7125 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:14,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:14,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:14,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:15,767 INFO L124 PetriNetUnfolderBase]: 3514/5991 cut-off events. [2024-06-27 19:33:15,767 INFO L125 PetriNetUnfolderBase]: For 1374796/1374796 co-relation queries the response was YES. [2024-06-27 19:33:15,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48682 conditions, 5991 events. 3514/5991 cut-off events. For 1374796/1374796 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 41418 event pairs, 946 based on Foata normal form. 1/5976 useless extension candidates. Maximal degree in co-relation 48473. Up to 4845 conditions per place. [2024-06-27 19:33:16,094 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 306 selfloop transitions, 232 changer transitions 0/546 dead transitions. [2024-06-27 19:33:16,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 546 transitions, 8927 flow [2024-06-27 19:33:16,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:33:16,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:33:16,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-27 19:33:16,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-27 19:33:16,095 INFO L175 Difference]: Start difference. First operand has 440 places, 518 transitions, 7125 flow. Second operand 10 states and 230 transitions. [2024-06-27 19:33:16,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 546 transitions, 8927 flow [2024-06-27 19:33:23,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 546 transitions, 8587 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:23,489 INFO L231 Difference]: Finished difference. Result has 446 places, 524 transitions, 7345 flow [2024-06-27 19:33:23,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6815, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7345, PETRI_PLACES=446, PETRI_TRANSITIONS=524} [2024-06-27 19:33:23,489 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 404 predicate places. [2024-06-27 19:33:23,489 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 524 transitions, 7345 flow [2024-06-27 19:33:23,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:23,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:23,490 INFO L208 CegarLoopForPetriNet]: trace 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 19:33:23,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-27 19:33:23,490 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 19:33:23,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:23,490 INFO L85 PathProgramCache]: Analyzing trace with hash 376625486, now seen corresponding path program 6 times [2024-06-27 19:33:23,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:23,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040501858] [2024-06-27 19:33:23,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:23,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:23,549 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 19:33:23,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:23,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040501858] [2024-06-27 19:33:23,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040501858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:23,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:23,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:23,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573414102] [2024-06-27 19:33:23,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:23,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:23,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:23,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:23,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:23,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:23,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 524 transitions, 7345 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:23,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:23,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:23,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:25,104 INFO L124 PetriNetUnfolderBase]: 3519/6030 cut-off events. [2024-06-27 19:33:25,104 INFO L125 PetriNetUnfolderBase]: For 1394989/1394995 co-relation queries the response was YES. [2024-06-27 19:33:25,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48923 conditions, 6030 events. 3519/6030 cut-off events. For 1394989/1394995 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 42028 event pairs, 910 based on Foata normal form. 5/6024 useless extension candidates. Maximal degree in co-relation 48712. Up to 4851 conditions per place. [2024-06-27 19:33:25,193 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 308 selfloop transitions, 230 changer transitions 0/546 dead transitions. [2024-06-27 19:33:25,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 546 transitions, 9103 flow [2024-06-27 19:33:25,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:25,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:25,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:33:25,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-27 19:33:25,194 INFO L175 Difference]: Start difference. First operand has 446 places, 524 transitions, 7345 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:33:25,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 546 transitions, 9103 flow [2024-06-27 19:33:31,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 546 transitions, 8810 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 19:33:31,874 INFO L231 Difference]: Finished difference. Result has 447 places, 527 transitions, 7567 flow [2024-06-27 19:33:31,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7055, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7567, PETRI_PLACES=447, PETRI_TRANSITIONS=527} [2024-06-27 19:33:31,874 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 405 predicate places. [2024-06-27 19:33:31,874 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 527 transitions, 7567 flow [2024-06-27 19:33:31,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:31,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:31,874 INFO L208 CegarLoopForPetriNet]: trace 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 19:33:31,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-27 19:33:31,875 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 19:33:31,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:31,875 INFO L85 PathProgramCache]: Analyzing trace with hash -62411122, now seen corresponding path program 7 times [2024-06-27 19:33:31,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:31,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155053510] [2024-06-27 19:33:31,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:31,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:31,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:31,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:31,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:31,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155053510] [2024-06-27 19:33:31,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155053510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:31,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:31,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:31,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530716049] [2024-06-27 19:33:31,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:31,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:31,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:31,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:31,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:31,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:31,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 527 transitions, 7567 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:31,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:31,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:31,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:33,468 INFO L124 PetriNetUnfolderBase]: 3524/6039 cut-off events. [2024-06-27 19:33:33,468 INFO L125 PetriNetUnfolderBase]: For 1416411/1416417 co-relation queries the response was YES. [2024-06-27 19:33:33,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49180 conditions, 6039 events. 3524/6039 cut-off events. For 1416411/1416417 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 42064 event pairs, 910 based on Foata normal form. 5/6033 useless extension candidates. Maximal degree in co-relation 48967. Up to 4857 conditions per place. [2024-06-27 19:33:33,560 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 311 selfloop transitions, 227 changer transitions 0/546 dead transitions. [2024-06-27 19:33:33,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 546 transitions, 9324 flow [2024-06-27 19:33:33,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:33,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:33,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:33:33,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-27 19:33:33,561 INFO L175 Difference]: Start difference. First operand has 447 places, 527 transitions, 7567 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:33:33,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 546 transitions, 9324 flow [2024-06-27 19:33:42,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 546 transitions, 8614 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-27 19:33:42,519 INFO L231 Difference]: Finished difference. Result has 446 places, 530 transitions, 7370 flow [2024-06-27 19:33:42,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6875, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7370, PETRI_PLACES=446, PETRI_TRANSITIONS=530} [2024-06-27 19:33:42,519 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 404 predicate places. [2024-06-27 19:33:42,520 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 530 transitions, 7370 flow [2024-06-27 19:33:42,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:42,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:42,520 INFO L208 CegarLoopForPetriNet]: trace 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 19:33:42,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-27 19:33:42,520 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 19:33:42,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:42,521 INFO L85 PathProgramCache]: Analyzing trace with hash 2028145930, now seen corresponding path program 8 times [2024-06-27 19:33:42,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:42,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807927453] [2024-06-27 19:33:42,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:42,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:42,595 INFO 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 19:33:42,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:42,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807927453] [2024-06-27 19:33:42,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807927453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:42,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:42,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:42,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472626672] [2024-06-27 19:33:42,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:42,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:42,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:42,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:42,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:42,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:42,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 530 transitions, 7370 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:42,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:42,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:42,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:44,216 INFO L124 PetriNetUnfolderBase]: 3521/6005 cut-off events. [2024-06-27 19:33:44,216 INFO L125 PetriNetUnfolderBase]: For 1421884/1421884 co-relation queries the response was YES. [2024-06-27 19:33:44,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48706 conditions, 6005 events. 3521/6005 cut-off events. For 1421884/1421884 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 41641 event pairs, 948 based on Foata normal form. 1/5990 useless extension candidates. Maximal degree in co-relation 48496. Up to 4854 conditions per place. [2024-06-27 19:33:44,305 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 305 selfloop transitions, 236 changer transitions 0/549 dead transitions. [2024-06-27 19:33:44,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 549 transitions, 8796 flow [2024-06-27 19:33:44,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:44,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:44,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 19:33:44,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-27 19:33:44,306 INFO L175 Difference]: Start difference. First operand has 446 places, 530 transitions, 7370 flow. Second operand 8 states and 193 transitions. [2024-06-27 19:33:44,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 549 transitions, 8796 flow [2024-06-27 19:33:52,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 549 transitions, 8365 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:52,081 INFO L231 Difference]: Finished difference. Result has 450 places, 530 transitions, 7418 flow [2024-06-27 19:33:52,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6939, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7418, PETRI_PLACES=450, PETRI_TRANSITIONS=530} [2024-06-27 19:33:52,081 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-27 19:33:52,081 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 530 transitions, 7418 flow [2024-06-27 19:33:52,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:52,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:52,081 INFO L208 CegarLoopForPetriNet]: trace 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 19:33:52,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-27 19:33:52,082 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 19:33:52,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:52,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1636215848, now seen corresponding path program 9 times [2024-06-27 19:33:52,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:52,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110824104] [2024-06-27 19:33:52,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:52,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:52,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:52,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:52,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110824104] [2024-06-27 19:33:52,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110824104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:52,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:52,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:52,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073440946] [2024-06-27 19:33:52,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:52,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:52,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:52,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:52,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:52,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:52,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 530 transitions, 7418 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:52,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:52,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:52,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:53,664 INFO L124 PetriNetUnfolderBase]: 3518/6031 cut-off events. [2024-06-27 19:33:53,665 INFO L125 PetriNetUnfolderBase]: For 1427801/1427807 co-relation queries the response was YES. [2024-06-27 19:33:53,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48756 conditions, 6031 events. 3518/6031 cut-off events. For 1427801/1427807 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 41978 event pairs, 910 based on Foata normal form. 5/6025 useless extension candidates. Maximal degree in co-relation 48545. Up to 4851 conditions per place. [2024-06-27 19:33:53,755 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 303 selfloop transitions, 234 changer transitions 0/545 dead transitions. [2024-06-27 19:33:53,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 545 transitions, 8828 flow [2024-06-27 19:33:53,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:53,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:53,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:33:53,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-27 19:33:53,756 INFO L175 Difference]: Start difference. First operand has 450 places, 530 transitions, 7418 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:33:53,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 545 transitions, 8828 flow [2024-06-27 19:34:01,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 545 transitions, 8356 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 19:34:01,348 INFO L231 Difference]: Finished difference. Result has 450 places, 530 transitions, 7420 flow [2024-06-27 19:34:01,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6946, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7420, PETRI_PLACES=450, PETRI_TRANSITIONS=530} [2024-06-27 19:34:01,349 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-27 19:34:01,349 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 530 transitions, 7420 flow [2024-06-27 19:34:01,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:01,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:01,350 INFO L208 CegarLoopForPetriNet]: trace 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 19:34:01,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-27 19:34:01,350 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 19:34:01,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:01,350 INFO L85 PathProgramCache]: Analyzing trace with hash 852732280, now seen corresponding path program 10 times [2024-06-27 19:34:01,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:01,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434061984] [2024-06-27 19:34:01,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:01,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:01,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:01,432 INFO 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 19:34:01,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:01,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434061984] [2024-06-27 19:34:01,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434061984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:01,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:01,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:01,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619218251] [2024-06-27 19:34:01,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:01,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:01,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:01,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:01,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:01,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:01,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 530 transitions, 7420 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:01,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:01,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:01,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:02,953 INFO L124 PetriNetUnfolderBase]: 3531/6035 cut-off events. [2024-06-27 19:34:02,953 INFO L125 PetriNetUnfolderBase]: For 1458287/1458287 co-relation queries the response was YES. [2024-06-27 19:34:03,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49070 conditions, 6035 events. 3531/6035 cut-off events. For 1458287/1458287 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 41906 event pairs, 922 based on Foata normal form. 1/6020 useless extension candidates. Maximal degree in co-relation 48858. Up to 4866 conditions per place. [2024-06-27 19:34:03,043 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 286 selfloop transitions, 262 changer transitions 0/556 dead transitions. [2024-06-27 19:34:03,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 556 transitions, 9546 flow [2024-06-27 19:34:03,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:34:03,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:34:03,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-27 19:34:03,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5804878048780487 [2024-06-27 19:34:03,044 INFO L175 Difference]: Start difference. First operand has 450 places, 530 transitions, 7420 flow. Second operand 10 states and 238 transitions. [2024-06-27 19:34:03,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 556 transitions, 9546 flow [2024-06-27 19:34:11,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 556 transitions, 8837 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 19:34:11,381 INFO L231 Difference]: Finished difference. Result has 452 places, 536 transitions, 7319 flow [2024-06-27 19:34:11,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6729, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7319, PETRI_PLACES=452, PETRI_TRANSITIONS=536} [2024-06-27 19:34:11,382 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-27 19:34:11,382 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 536 transitions, 7319 flow [2024-06-27 19:34:11,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:11,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:11,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:11,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-27 19:34:11,382 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 19:34:11,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:11,382 INFO L85 PathProgramCache]: Analyzing trace with hash 969497068, now seen corresponding path program 11 times [2024-06-27 19:34:11,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:11,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058188822] [2024-06-27 19:34:11,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:11,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:11,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:11,450 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 19:34:11,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:11,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058188822] [2024-06-27 19:34:11,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058188822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:11,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:11,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:11,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182811122] [2024-06-27 19:34:11,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:11,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:11,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:11,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:11,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:11,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:11,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 536 transitions, 7319 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:11,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:11,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:11,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:13,013 INFO L124 PetriNetUnfolderBase]: 3536/6026 cut-off events. [2024-06-27 19:34:13,013 INFO L125 PetriNetUnfolderBase]: For 1474398/1474398 co-relation queries the response was YES. [2024-06-27 19:34:13,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49125 conditions, 6026 events. 3536/6026 cut-off events. For 1474398/1474398 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 41736 event pairs, 940 based on Foata normal form. 1/6011 useless extension candidates. Maximal degree in co-relation 48912. Up to 4872 conditions per place. [2024-06-27 19:34:13,101 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 305 selfloop transitions, 246 changer transitions 0/559 dead transitions. [2024-06-27 19:34:13,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 559 transitions, 9415 flow [2024-06-27 19:34:13,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:34:13,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:34:13,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-27 19:34:13,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634146341463414 [2024-06-27 19:34:13,102 INFO L175 Difference]: Start difference. First operand has 452 places, 536 transitions, 7319 flow. Second operand 10 states and 231 transitions. [2024-06-27 19:34:13,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 559 transitions, 9415 flow [2024-06-27 19:34:20,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 559 transitions, 8355 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-27 19:34:20,814 INFO L231 Difference]: Finished difference. Result has 452 places, 539 transitions, 6793 flow [2024-06-27 19:34:20,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6274, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6793, PETRI_PLACES=452, PETRI_TRANSITIONS=539} [2024-06-27 19:34:20,814 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-27 19:34:20,814 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 539 transitions, 6793 flow [2024-06-27 19:34:20,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:20,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:20,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:20,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-27 19:34:20,815 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 19:34:20,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:20,815 INFO L85 PathProgramCache]: Analyzing trace with hash 969491488, now seen corresponding path program 12 times [2024-06-27 19:34:20,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:20,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37761723] [2024-06-27 19:34:20,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:20,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:20,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:20,944 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 19:34:20,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:20,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37761723] [2024-06-27 19:34:20,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37761723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:20,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:20,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:20,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976429044] [2024-06-27 19:34:20,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:20,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:20,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:20,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:20,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:20,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:20,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 539 transitions, 6793 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:20,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:20,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:20,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:22,405 INFO L124 PetriNetUnfolderBase]: 3533/6030 cut-off events. [2024-06-27 19:34:22,405 INFO L125 PetriNetUnfolderBase]: For 1473467/1473467 co-relation queries the response was YES. [2024-06-27 19:34:22,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48757 conditions, 6030 events. 3533/6030 cut-off events. For 1473467/1473467 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 41778 event pairs, 948 based on Foata normal form. 1/6015 useless extension candidates. Maximal degree in co-relation 48546. Up to 4869 conditions per place. [2024-06-27 19:34:22,496 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 305 selfloop transitions, 243 changer transitions 0/556 dead transitions. [2024-06-27 19:34:22,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 556 transitions, 8541 flow [2024-06-27 19:34:22,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:22,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:22,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 19:34:22,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-27 19:34:22,497 INFO L175 Difference]: Start difference. First operand has 452 places, 539 transitions, 6793 flow. Second operand 8 states and 192 transitions. [2024-06-27 19:34:22,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 556 transitions, 8541 flow [2024-06-27 19:34:30,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 556 transitions, 7888 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 19:34:30,375 INFO L231 Difference]: Finished difference. Result has 451 places, 539 transitions, 6634 flow [2024-06-27 19:34:30,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6140, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6634, PETRI_PLACES=451, PETRI_TRANSITIONS=539} [2024-06-27 19:34:30,376 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 409 predicate places. [2024-06-27 19:34:30,376 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 539 transitions, 6634 flow [2024-06-27 19:34:30,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:30,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:30,376 INFO L208 CegarLoopForPetriNet]: trace 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 19:34:30,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-27 19:34:30,376 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 19:34:30,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:30,377 INFO L85 PathProgramCache]: Analyzing trace with hash 794067974, now seen corresponding path program 13 times [2024-06-27 19:34:30,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:30,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810610804] [2024-06-27 19:34:30,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:30,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:30,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:30,444 INFO 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 19:34:30,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:30,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810610804] [2024-06-27 19:34:30,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810610804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:30,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:30,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:30,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086240406] [2024-06-27 19:34:30,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:30,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:30,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:30,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:30,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:30,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:30,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 539 transitions, 6634 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:30,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:30,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:30,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:31,970 INFO L124 PetriNetUnfolderBase]: 3530/6021 cut-off events. [2024-06-27 19:34:31,970 INFO L125 PetriNetUnfolderBase]: For 1477839/1477839 co-relation queries the response was YES. [2024-06-27 19:34:32,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48619 conditions, 6021 events. 3530/6021 cut-off events. For 1477839/1477839 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 41713 event pairs, 954 based on Foata normal form. 1/6006 useless extension candidates. Maximal degree in co-relation 48408. Up to 4866 conditions per place. [2024-06-27 19:34:32,060 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 299 selfloop transitions, 248 changer transitions 0/555 dead transitions. [2024-06-27 19:34:32,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 555 transitions, 8074 flow [2024-06-27 19:34:32,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:32,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:32,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:34:32,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-27 19:34:32,061 INFO L175 Difference]: Start difference. First operand has 451 places, 539 transitions, 6634 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:34:32,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 555 transitions, 8074 flow [2024-06-27 19:34:39,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 555 transitions, 7588 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 19:34:39,644 INFO L231 Difference]: Finished difference. Result has 452 places, 539 transitions, 6650 flow [2024-06-27 19:34:39,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6148, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6650, PETRI_PLACES=452, PETRI_TRANSITIONS=539} [2024-06-27 19:34:39,645 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-27 19:34:39,645 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 539 transitions, 6650 flow [2024-06-27 19:34:39,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:39,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:39,645 INFO L208 CegarLoopForPetriNet]: trace 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 19:34:39,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-27 19:34:39,645 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 19:34:39,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:39,645 INFO L85 PathProgramCache]: Analyzing trace with hash -819229358, now seen corresponding path program 14 times [2024-06-27 19:34:39,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:39,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294392001] [2024-06-27 19:34:39,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:39,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:39,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:39,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:39,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294392001] [2024-06-27 19:34:39,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294392001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:39,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:39,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:39,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452271648] [2024-06-27 19:34:39,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:39,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:39,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:39,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:39,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:39,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:39,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 539 transitions, 6650 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:39,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:39,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:39,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:41,234 INFO L124 PetriNetUnfolderBase]: 3535/6045 cut-off events. [2024-06-27 19:34:41,234 INFO L125 PetriNetUnfolderBase]: For 1496063/1496063 co-relation queries the response was YES. [2024-06-27 19:34:41,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48802 conditions, 6045 events. 3535/6045 cut-off events. For 1496063/1496063 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 42058 event pairs, 922 based on Foata normal form. 1/6030 useless extension candidates. Maximal degree in co-relation 48590. Up to 4872 conditions per place. [2024-06-27 19:34:41,325 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 302 selfloop transitions, 249 changer transitions 0/559 dead transitions. [2024-06-27 19:34:41,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 559 transitions, 8436 flow [2024-06-27 19:34:41,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:41,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:41,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:34:41,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-27 19:34:41,326 INFO L175 Difference]: Start difference. First operand has 452 places, 539 transitions, 6650 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:34:41,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 559 transitions, 8436 flow [2024-06-27 19:34:49,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 559 transitions, 7900 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 19:34:49,317 INFO L231 Difference]: Finished difference. Result has 452 places, 542 transitions, 6645 flow [2024-06-27 19:34:49,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6120, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6645, PETRI_PLACES=452, PETRI_TRANSITIONS=542} [2024-06-27 19:34:49,317 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-27 19:34:49,318 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 542 transitions, 6645 flow [2024-06-27 19:34:49,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:49,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:49,318 INFO L208 CegarLoopForPetriNet]: trace 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 19:34:49,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-27 19:34:49,318 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 19:34:49,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:49,318 INFO L85 PathProgramCache]: Analyzing trace with hash 788912984, now seen corresponding path program 15 times [2024-06-27 19:34:49,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:49,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373600140] [2024-06-27 19:34:49,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:49,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:49,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:49,383 INFO 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 19:34:49,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:49,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373600140] [2024-06-27 19:34:49,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373600140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:49,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:49,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:49,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096482233] [2024-06-27 19:34:49,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:49,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:49,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:49,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:49,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:49,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:49,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 542 transitions, 6645 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:49,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:49,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:49,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:50,965 INFO L124 PetriNetUnfolderBase]: 3532/6041 cut-off events. [2024-06-27 19:34:50,965 INFO L125 PetriNetUnfolderBase]: For 1502526/1502526 co-relation queries the response was YES. [2024-06-27 19:34:51,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48735 conditions, 6041 events. 3532/6041 cut-off events. For 1502526/1502526 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 42034 event pairs, 922 based on Foata normal form. 1/6026 useless extension candidates. Maximal degree in co-relation 48522. Up to 4869 conditions per place. [2024-06-27 19:34:51,051 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 294 selfloop transitions, 256 changer transitions 0/558 dead transitions. [2024-06-27 19:34:51,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 558 transitions, 8095 flow [2024-06-27 19:34:51,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:51,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:51,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:34:51,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-27 19:34:51,052 INFO L175 Difference]: Start difference. First operand has 452 places, 542 transitions, 6645 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:34:51,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 558 transitions, 8095 flow [2024-06-27 19:34:59,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 558 transitions, 7630 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 19:34:59,050 INFO L231 Difference]: Finished difference. Result has 455 places, 542 transitions, 6698 flow [2024-06-27 19:34:59,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6180, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6698, PETRI_PLACES=455, PETRI_TRANSITIONS=542} [2024-06-27 19:34:59,050 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-27 19:34:59,050 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 542 transitions, 6698 flow [2024-06-27 19:34:59,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:59,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:59,051 INFO L208 CegarLoopForPetriNet]: trace 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 19:34:59,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-27 19:34:59,051 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 19:34:59,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:59,051 INFO L85 PathProgramCache]: Analyzing trace with hash -232825062, now seen corresponding path program 16 times [2024-06-27 19:34:59,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:59,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281213418] [2024-06-27 19:34:59,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:59,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:59,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:59,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:59,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:59,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281213418] [2024-06-27 19:34:59,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281213418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:59,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:59,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:59,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589431133] [2024-06-27 19:34:59,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:59,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:59,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:59,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:59,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:59,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:59,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 542 transitions, 6698 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:59,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:59,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:59,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:00,646 INFO L124 PetriNetUnfolderBase]: 3545/6080 cut-off events. [2024-06-27 19:35:00,646 INFO L125 PetriNetUnfolderBase]: For 1532289/1532289 co-relation queries the response was YES. [2024-06-27 19:35:00,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49153 conditions, 6080 events. 3545/6080 cut-off events. For 1532289/1532289 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 42412 event pairs, 845 based on Foata normal form. 1/6075 useless extension candidates. Maximal degree in co-relation 48939. Up to 5145 conditions per place. [2024-06-27 19:35:00,737 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 426 selfloop transitions, 131 changer transitions 0/565 dead transitions. [2024-06-27 19:35:00,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 565 transitions, 8540 flow [2024-06-27 19:35:00,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:35:00,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:35:00,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 19:35:00,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-27 19:35:00,739 INFO L175 Difference]: Start difference. First operand has 455 places, 542 transitions, 6698 flow. Second operand 8 states and 192 transitions. [2024-06-27 19:35:00,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 565 transitions, 8540 flow [2024-06-27 19:35:08,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 565 transitions, 7961 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 19:35:08,867 INFO L231 Difference]: Finished difference. Result has 455 places, 548 transitions, 6447 flow [2024-06-27 19:35:08,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6131, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6447, PETRI_PLACES=455, PETRI_TRANSITIONS=548} [2024-06-27 19:35:08,867 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-27 19:35:08,867 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 548 transitions, 6447 flow [2024-06-27 19:35:08,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:08,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:08,867 INFO L208 CegarLoopForPetriNet]: trace 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 19:35:08,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-27 19:35:08,867 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 19:35:08,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:08,868 INFO L85 PathProgramCache]: Analyzing trace with hash -233032452, now seen corresponding path program 17 times [2024-06-27 19:35:08,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:08,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097896927] [2024-06-27 19:35:08,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:08,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:08,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:08,945 INFO 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 19:35:08,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:08,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097896927] [2024-06-27 19:35:08,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097896927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:08,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:08,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:08,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900308465] [2024-06-27 19:35:08,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:08,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:08,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:08,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:08,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:08,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:08,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 548 transitions, 6447 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:08,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:08,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:08,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:10,494 INFO L124 PetriNetUnfolderBase]: 3550/6089 cut-off events. [2024-06-27 19:35:10,494 INFO L125 PetriNetUnfolderBase]: For 1550373/1550373 co-relation queries the response was YES. [2024-06-27 19:35:10,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48937 conditions, 6089 events. 3550/6089 cut-off events. For 1550373/1550373 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 42467 event pairs, 845 based on Foata normal form. 1/6084 useless extension candidates. Maximal degree in co-relation 48722. Up to 5151 conditions per place. [2024-06-27 19:35:10,582 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 429 selfloop transitions, 131 changer transitions 0/568 dead transitions. [2024-06-27 19:35:10,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 568 transitions, 7953 flow [2024-06-27 19:35:10,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:35:10,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:35:10,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-27 19:35:10,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663956639566395 [2024-06-27 19:35:10,583 INFO L175 Difference]: Start difference. First operand has 455 places, 548 transitions, 6447 flow. Second operand 9 states and 209 transitions. [2024-06-27 19:35:10,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 568 transitions, 7953 flow [2024-06-27 19:35:18,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 568 transitions, 7746 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 19:35:18,237 INFO L231 Difference]: Finished difference. Result has 460 places, 551 transitions, 6538 flow [2024-06-27 19:35:18,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6243, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6538, PETRI_PLACES=460, PETRI_TRANSITIONS=551} [2024-06-27 19:35:18,238 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 418 predicate places. [2024-06-27 19:35:18,238 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 551 transitions, 6538 flow [2024-06-27 19:35:18,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:18,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:18,238 INFO L208 CegarLoopForPetriNet]: trace 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 19:35:18,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-27 19:35:18,239 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 19:35:18,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:18,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1280002040, now seen corresponding path program 18 times [2024-06-27 19:35:18,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:18,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403600762] [2024-06-27 19:35:18,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:18,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:18,322 INFO 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 19:35:18,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:18,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403600762] [2024-06-27 19:35:18,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403600762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:18,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:18,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:18,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101978614] [2024-06-27 19:35:18,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:18,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:18,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:18,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:18,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:18,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:18,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 551 transitions, 6538 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:18,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:18,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:18,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:19,969 INFO L124 PetriNetUnfolderBase]: 3555/6090 cut-off events. [2024-06-27 19:35:19,969 INFO L125 PetriNetUnfolderBase]: For 1569948/1569948 co-relation queries the response was YES. [2024-06-27 19:35:20,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49135 conditions, 6090 events. 3555/6090 cut-off events. For 1569948/1569948 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 42461 event pairs, 839 based on Foata normal form. 1/6085 useless extension candidates. Maximal degree in co-relation 48919. Up to 5157 conditions per place. [2024-06-27 19:35:20,059 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 438 selfloop transitions, 137 changer transitions 0/583 dead transitions. [2024-06-27 19:35:20,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 583 transitions, 8745 flow [2024-06-27 19:35:20,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:35:20,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:35:20,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-27 19:35:20,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902439024390244 [2024-06-27 19:35:20,060 INFO L175 Difference]: Start difference. First operand has 460 places, 551 transitions, 6538 flow. Second operand 10 states and 242 transitions. [2024-06-27 19:35:20,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 583 transitions, 8745 flow [2024-06-27 19:35:27,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 583 transitions, 8477 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 19:35:27,965 INFO L231 Difference]: Finished difference. Result has 463 places, 554 transitions, 6583 flow [2024-06-27 19:35:27,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6276, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6583, PETRI_PLACES=463, PETRI_TRANSITIONS=554} [2024-06-27 19:35:27,965 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-27 19:35:27,965 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 554 transitions, 6583 flow [2024-06-27 19:35:27,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:27,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:27,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:27,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-27 19:35:27,966 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 19:35:27,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:27,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1279996460, now seen corresponding path program 19 times [2024-06-27 19:35:27,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:27,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244659206] [2024-06-27 19:35:27,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:27,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:28,090 INFO 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 19:35:28,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:28,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244659206] [2024-06-27 19:35:28,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244659206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:28,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:28,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:28,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606394322] [2024-06-27 19:35:28,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:28,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:28,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:28,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:28,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:28,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:28,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 554 transitions, 6583 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:28,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:28,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:28,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:29,573 INFO L124 PetriNetUnfolderBase]: 3552/6094 cut-off events. [2024-06-27 19:35:29,573 INFO L125 PetriNetUnfolderBase]: For 1576085/1576085 co-relation queries the response was YES. [2024-06-27 19:35:29,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49136 conditions, 6094 events. 3552/6094 cut-off events. For 1576085/1576085 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 42504 event pairs, 847 based on Foata normal form. 1/6089 useless extension candidates. Maximal degree in co-relation 48919. Up to 5154 conditions per place. [2024-06-27 19:35:29,668 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 438 selfloop transitions, 134 changer transitions 0/580 dead transitions. [2024-06-27 19:35:29,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 580 transitions, 8431 flow [2024-06-27 19:35:29,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:35:29,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:35:29,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 19:35:29,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-27 19:35:29,669 INFO L175 Difference]: Start difference. First operand has 463 places, 554 transitions, 6583 flow. Second operand 8 states and 203 transitions. [2024-06-27 19:35:29,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 580 transitions, 8431 flow [2024-06-27 19:35:38,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 580 transitions, 8102 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 19:35:38,128 INFO L231 Difference]: Finished difference. Result has 464 places, 554 transitions, 6530 flow [2024-06-27 19:35:38,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6254, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6530, PETRI_PLACES=464, PETRI_TRANSITIONS=554} [2024-06-27 19:35:38,128 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-27 19:35:38,128 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 554 transitions, 6530 flow [2024-06-27 19:35:38,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:38,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:38,128 INFO L208 CegarLoopForPetriNet]: trace 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 19:35:38,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-27 19:35:38,128 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 19:35:38,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:38,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1291966490, now seen corresponding path program 20 times [2024-06-27 19:35:38,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:38,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363415099] [2024-06-27 19:35:38,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:38,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:38,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:38,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:38,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:38,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363415099] [2024-06-27 19:35:38,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363415099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:38,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:38,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:38,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598270603] [2024-06-27 19:35:38,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:38,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:38,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:38,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:38,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:38,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:38,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 554 transitions, 6530 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:38,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:38,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:38,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:39,724 INFO L124 PetriNetUnfolderBase]: 3549/6082 cut-off events. [2024-06-27 19:35:39,724 INFO L125 PetriNetUnfolderBase]: For 1582591/1582591 co-relation queries the response was YES. [2024-06-27 19:35:39,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49038 conditions, 6082 events. 3549/6082 cut-off events. For 1582591/1582591 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 42454 event pairs, 839 based on Foata normal form. 1/6077 useless extension candidates. Maximal degree in co-relation 48820. Up to 5151 conditions per place. [2024-06-27 19:35:39,813 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 432 selfloop transitions, 133 changer transitions 0/573 dead transitions. [2024-06-27 19:35:39,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 573 transitions, 8028 flow [2024-06-27 19:35:39,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:35:39,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:35:39,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:35:39,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-27 19:35:39,814 INFO L175 Difference]: Start difference. First operand has 464 places, 554 transitions, 6530 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:35:39,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 573 transitions, 8028 flow [2024-06-27 19:35:47,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 573 transitions, 7760 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 19:35:47,836 INFO L231 Difference]: Finished difference. Result has 465 places, 554 transitions, 6534 flow [2024-06-27 19:35:47,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6262, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6534, PETRI_PLACES=465, PETRI_TRANSITIONS=554} [2024-06-27 19:35:47,836 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 423 predicate places. [2024-06-27 19:35:47,836 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 554 transitions, 6534 flow [2024-06-27 19:35:47,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:47,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:47,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:47,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-27 19:35:47,837 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 19:35:47,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:47,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1286811500, now seen corresponding path program 21 times [2024-06-27 19:35:47,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:47,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572027455] [2024-06-27 19:35:47,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:47,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:47,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:47,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:47,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:47,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572027455] [2024-06-27 19:35:47,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572027455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:47,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:47,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:35:47,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970107964] [2024-06-27 19:35:47,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:47,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:35:47,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:47,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:35:47,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:35:47,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:47,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 554 transitions, 6534 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:47,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:47,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:47,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:49,488 INFO L124 PetriNetUnfolderBase]: 3554/6099 cut-off events. [2024-06-27 19:35:49,489 INFO L125 PetriNetUnfolderBase]: For 1601182/1601182 co-relation queries the response was YES. [2024-06-27 19:35:49,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49192 conditions, 6099 events. 3554/6099 cut-off events. For 1601182/1601182 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 42648 event pairs, 847 based on Foata normal form. 1/6094 useless extension candidates. Maximal degree in co-relation 48973. Up to 5157 conditions per place. [2024-06-27 19:35:49,578 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 428 selfloop transitions, 139 changer transitions 0/575 dead transitions. [2024-06-27 19:35:49,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 575 transitions, 8069 flow [2024-06-27 19:35:49,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:35:49,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:35:49,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 19:35:49,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:35:49,581 INFO L175 Difference]: Start difference. First operand has 465 places, 554 transitions, 6534 flow. Second operand 7 states and 175 transitions. [2024-06-27 19:35:49,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 575 transitions, 8069 flow [2024-06-27 19:35:58,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 575 transitions, 7753 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 19:35:58,395 INFO L231 Difference]: Finished difference. Result has 464 places, 557 transitions, 6535 flow [2024-06-27 19:35:58,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6224, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6535, PETRI_PLACES=464, PETRI_TRANSITIONS=557} [2024-06-27 19:35:58,396 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-27 19:35:58,396 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 557 transitions, 6535 flow [2024-06-27 19:35:58,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:58,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:58,396 INFO L208 CegarLoopForPetriNet]: trace 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 19:35:58,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-27 19:35:58,396 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 19:35:58,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:58,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1114530306, now seen corresponding path program 22 times [2024-06-27 19:35:58,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:58,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029308620] [2024-06-27 19:35:58,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:58,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:58,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:58,458 INFO 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 19:35:58,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:58,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029308620] [2024-06-27 19:35:58,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029308620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:58,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:58,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:35:58,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198305486] [2024-06-27 19:35:58,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:58,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:35:58,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:58,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:35:58,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:35:58,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:58,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 557 transitions, 6535 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:58,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:58,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:58,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:00,112 INFO L124 PetriNetUnfolderBase]: 3551/6087 cut-off events. [2024-06-27 19:36:00,112 INFO L125 PetriNetUnfolderBase]: For 1607059/1607059 co-relation queries the response was YES. [2024-06-27 19:36:00,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49098 conditions, 6087 events. 3551/6087 cut-off events. For 1607059/1607059 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 42443 event pairs, 839 based on Foata normal form. 1/6082 useless extension candidates. Maximal degree in co-relation 48878. Up to 5154 conditions per place. [2024-06-27 19:36:00,203 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 432 selfloop transitions, 137 changer transitions 0/577 dead transitions. [2024-06-27 19:36:00,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 577 transitions, 7723 flow [2024-06-27 19:36:00,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:36:00,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:36:00,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 19:36:00,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-27 19:36:00,204 INFO L175 Difference]: Start difference. First operand has 464 places, 557 transitions, 6535 flow. Second operand 7 states and 177 transitions. [2024-06-27 19:36:00,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 577 transitions, 7723 flow [2024-06-27 19:36:08,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 577 transitions, 7294 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 19:36:08,528 INFO L231 Difference]: Finished difference. Result has 464 places, 557 transitions, 6388 flow [2024-06-27 19:36:08,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6106, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6388, PETRI_PLACES=464, PETRI_TRANSITIONS=557} [2024-06-27 19:36:08,529 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-27 19:36:08,529 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 557 transitions, 6388 flow [2024-06-27 19:36:08,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:08,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:08,529 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 19:36:08,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-27 19:36:08,529 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 19:36:08,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:08,529 INFO L85 PathProgramCache]: Analyzing trace with hash -198625733, now seen corresponding path program 9 times [2024-06-27 19:36:08,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:08,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193822394] [2024-06-27 19:36:08,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:08,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:08,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:08,596 INFO 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 19:36:08,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:08,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193822394] [2024-06-27 19:36:08,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193822394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:08,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:08,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:36:08,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388682295] [2024-06-27 19:36:08,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:08,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:36:08,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:08,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:36:08,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:36:08,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:36:08,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 557 transitions, 6388 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:08,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:08,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:36:08,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:10,151 INFO L124 PetriNetUnfolderBase]: 3605/6139 cut-off events. [2024-06-27 19:36:10,152 INFO L125 PetriNetUnfolderBase]: For 1757800/1757800 co-relation queries the response was YES. [2024-06-27 19:36:10,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51441 conditions, 6139 events. 3605/6139 cut-off events. For 1757800/1757800 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 42655 event pairs, 966 based on Foata normal form. 2/6125 useless extension candidates. Maximal degree in co-relation 51220. Up to 4880 conditions per place. [2024-06-27 19:36:10,249 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 312 selfloop transitions, 271 changer transitions 0/591 dead transitions. [2024-06-27 19:36:10,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 591 transitions, 8142 flow [2024-06-27 19:36:10,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:36:10,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:36:10,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 19:36:10,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-27 19:36:10,250 INFO L175 Difference]: Start difference. First operand has 464 places, 557 transitions, 6388 flow. Second operand 8 states and 203 transitions. [2024-06-27 19:36:10,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 591 transitions, 8142 flow [2024-06-27 19:36:20,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 591 transitions, 7730 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 19:36:20,617 INFO L231 Difference]: Finished difference. Result has 464 places, 561 transitions, 6695 flow [2024-06-27 19:36:20,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5976, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6695, PETRI_PLACES=464, PETRI_TRANSITIONS=561} [2024-06-27 19:36:20,618 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-27 19:36:20,618 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 561 transitions, 6695 flow [2024-06-27 19:36:20,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:20,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:20,618 INFO L208 CegarLoopForPetriNet]: trace 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 19:36:20,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-27 19:36:20,618 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 19:36:20,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:20,619 INFO L85 PathProgramCache]: Analyzing trace with hash -190054853, now seen corresponding path program 10 times [2024-06-27 19:36:20,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:20,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511285238] [2024-06-27 19:36:20,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:20,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:20,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:20,697 INFO 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 19:36:20,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:20,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511285238] [2024-06-27 19:36:20,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511285238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:20,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:20,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:36:20,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607856244] [2024-06-27 19:36:20,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:20,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:36:20,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:20,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:36:20,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:36:20,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:36:20,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 561 transitions, 6695 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:20,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:20,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:36:20,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:22,283 INFO L124 PetriNetUnfolderBase]: 3613/6156 cut-off events. [2024-06-27 19:36:22,283 INFO L125 PetriNetUnfolderBase]: For 1779429/1779429 co-relation queries the response was YES. [2024-06-27 19:36:22,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52073 conditions, 6156 events. 3613/6156 cut-off events. For 1779429/1779429 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 42806 event pairs, 973 based on Foata normal form. 2/6142 useless extension candidates. Maximal degree in co-relation 51851. Up to 4981 conditions per place. [2024-06-27 19:36:22,376 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 309 selfloop transitions, 268 changer transitions 0/585 dead transitions. [2024-06-27 19:36:22,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 585 transitions, 7991 flow [2024-06-27 19:36:22,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:36:22,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:36:22,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 19:36:22,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-27 19:36:22,377 INFO L175 Difference]: Start difference. First operand has 464 places, 561 transitions, 6695 flow. Second operand 8 states and 195 transitions. [2024-06-27 19:36:22,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 585 transitions, 7991 flow [2024-06-27 19:36:31,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 585 transitions, 7543 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-27 19:36:31,888 INFO L231 Difference]: Finished difference. Result has 468 places, 563 transitions, 6880 flow [2024-06-27 19:36:31,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6269, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6880, PETRI_PLACES=468, PETRI_TRANSITIONS=563} [2024-06-27 19:36:31,888 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 426 predicate places. [2024-06-27 19:36:31,888 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 563 transitions, 6880 flow [2024-06-27 19:36:31,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:31,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:31,889 INFO L208 CegarLoopForPetriNet]: trace 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 19:36:31,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-27 19:36:31,889 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 19:36:31,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:31,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1286985275, now seen corresponding path program 11 times [2024-06-27 19:36:31,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:31,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916063041] [2024-06-27 19:36:31,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:31,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:31,960 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 19:36:31,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:31,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916063041] [2024-06-27 19:36:31,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916063041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:31,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:31,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:36:31,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316073395] [2024-06-27 19:36:31,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:31,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:36:31,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:31,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:36:31,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:36:32,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:36:32,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 563 transitions, 6880 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:32,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:32,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:36:32,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:33,550 INFO L124 PetriNetUnfolderBase]: 3621/6168 cut-off events. [2024-06-27 19:36:33,550 INFO L125 PetriNetUnfolderBase]: For 1797392/1797392 co-relation queries the response was YES. [2024-06-27 19:36:33,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52587 conditions, 6168 events. 3621/6168 cut-off events. For 1797392/1797392 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 42894 event pairs, 973 based on Foata normal form. 2/6154 useless extension candidates. Maximal degree in co-relation 52363. Up to 4993 conditions per place. [2024-06-27 19:36:33,647 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 310 selfloop transitions, 266 changer transitions 0/584 dead transitions. [2024-06-27 19:36:33,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 584 transitions, 8148 flow [2024-06-27 19:36:33,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:36:33,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:36:33,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 19:36:33,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-27 19:36:33,648 INFO L175 Difference]: Start difference. First operand has 468 places, 563 transitions, 6880 flow. Second operand 8 states and 192 transitions. [2024-06-27 19:36:33,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 584 transitions, 8148 flow [2024-06-27 19:36:43,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 584 transitions, 7557 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-27 19:36:43,486 INFO L231 Difference]: Finished difference. Result has 470 places, 565 transitions, 6900 flow [2024-06-27 19:36:43,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6289, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6900, PETRI_PLACES=470, PETRI_TRANSITIONS=565} [2024-06-27 19:36:43,488 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 428 predicate places. [2024-06-27 19:36:43,488 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 565 transitions, 6900 flow [2024-06-27 19:36:43,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:43,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:43,489 INFO L208 CegarLoopForPetriNet]: trace 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 19:36:43,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-27 19:36:43,489 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 19:36:43,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:43,489 INFO L85 PathProgramCache]: Analyzing trace with hash 592540807, now seen corresponding path program 12 times [2024-06-27 19:36:43,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:43,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868147629] [2024-06-27 19:36:43,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:43,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:43,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:43,573 INFO 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 19:36:43,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:43,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868147629] [2024-06-27 19:36:43,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868147629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:43,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:43,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:36:43,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753010133] [2024-06-27 19:36:43,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:43,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:36:43,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:43,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:36:43,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:36:43,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:36:43,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 565 transitions, 6900 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:43,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:43,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:36:43,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:45,157 INFO L124 PetriNetUnfolderBase]: 3657/6224 cut-off events. [2024-06-27 19:36:45,157 INFO L125 PetriNetUnfolderBase]: For 1937002/1937002 co-relation queries the response was YES. [2024-06-27 19:36:45,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53355 conditions, 6224 events. 3657/6224 cut-off events. For 1937002/1937002 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 43322 event pairs, 977 based on Foata normal form. 10/6218 useless extension candidates. Maximal degree in co-relation 53130. Up to 5017 conditions per place. [2024-06-27 19:36:45,253 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 317 selfloop transitions, 261 changer transitions 0/586 dead transitions. [2024-06-27 19:36:45,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 586 transitions, 8194 flow [2024-06-27 19:36:45,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:36:45,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:36:45,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 19:36:45,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-27 19:36:45,254 INFO L175 Difference]: Start difference. First operand has 470 places, 565 transitions, 6900 flow. Second operand 8 states and 193 transitions. [2024-06-27 19:36:45,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 586 transitions, 8194 flow [2024-06-27 19:36:55,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 586 transitions, 7603 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 19:36:55,038 INFO L231 Difference]: Finished difference. Result has 472 places, 567 transitions, 6915 flow [2024-06-27 19:36:55,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6309, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6915, PETRI_PLACES=472, PETRI_TRANSITIONS=567} [2024-06-27 19:36:55,038 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 430 predicate places. [2024-06-27 19:36:55,038 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 567 transitions, 6915 flow [2024-06-27 19:36:55,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:55,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:55,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:55,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-27 19:36:55,038 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 19:36:55,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:55,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1134076593, now seen corresponding path program 13 times [2024-06-27 19:36:55,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:55,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274545520] [2024-06-27 19:36:55,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:55,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:55,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:55,113 INFO 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 19:36:55,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:55,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274545520] [2024-06-27 19:36:55,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274545520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:55,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:55,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:36:55,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716876777] [2024-06-27 19:36:55,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:55,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:36:55,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:55,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:36:55,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:36:55,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:36:55,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 567 transitions, 6915 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:55,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:55,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:36:55,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:56,919 INFO L124 PetriNetUnfolderBase]: 3634/6219 cut-off events. [2024-06-27 19:36:56,919 INFO L125 PetriNetUnfolderBase]: For 1816342/1816342 co-relation queries the response was YES. [2024-06-27 19:36:56,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51387 conditions, 6219 events. 3634/6219 cut-off events. For 1816342/1816342 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 43466 event pairs, 847 based on Foata normal form. 10/6223 useless extension candidates. Maximal degree in co-relation 51161. Up to 5227 conditions per place. [2024-06-27 19:36:57,016 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 451 selfloop transitions, 139 changer transitions 0/598 dead transitions. [2024-06-27 19:36:57,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 598 transitions, 8191 flow [2024-06-27 19:36:57,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:36:57,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:36:57,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-27 19:36:57,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-27 19:36:57,017 INFO L175 Difference]: Start difference. First operand has 472 places, 567 transitions, 6915 flow. Second operand 8 states and 208 transitions. [2024-06-27 19:36:57,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 598 transitions, 8191 flow [2024-06-27 19:37:06,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 598 transitions, 7563 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-27 19:37:06,037 INFO L231 Difference]: Finished difference. Result has 474 places, 567 transitions, 6574 flow [2024-06-27 19:37:06,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6287, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6574, PETRI_PLACES=474, PETRI_TRANSITIONS=567} [2024-06-27 19:37:06,038 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 432 predicate places. [2024-06-27 19:37:06,038 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 567 transitions, 6574 flow [2024-06-27 19:37:06,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:06,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:06,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:06,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-27 19:37:06,039 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 19:37:06,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:06,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1436394831, now seen corresponding path program 14 times [2024-06-27 19:37:06,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:06,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270223545] [2024-06-27 19:37:06,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:06,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:06,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:06,158 INFO 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 19:37:06,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:06,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270223545] [2024-06-27 19:37:06,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270223545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:06,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:06,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:06,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782089276] [2024-06-27 19:37:06,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:06,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:06,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:06,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:06,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:06,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:37:06,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 567 transitions, 6574 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:06,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:06,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:37:06,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:07,888 INFO L124 PetriNetUnfolderBase]: 3611/6195 cut-off events. [2024-06-27 19:37:07,888 INFO L125 PetriNetUnfolderBase]: For 1677620/1677620 co-relation queries the response was YES. [2024-06-27 19:37:07,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48237 conditions, 6195 events. 3611/6195 cut-off events. For 1677620/1677620 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 43306 event pairs, 818 based on Foata normal form. 10/6202 useless extension candidates. Maximal degree in co-relation 48010. Up to 5188 conditions per place. [2024-06-27 19:37:07,981 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 444 selfloop transitions, 153 changer transitions 0/605 dead transitions. [2024-06-27 19:37:07,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 605 transitions, 7882 flow [2024-06-27 19:37:07,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:07,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:07,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-27 19:37:07,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6395663956639567 [2024-06-27 19:37:07,982 INFO L175 Difference]: Start difference. First operand has 474 places, 567 transitions, 6574 flow. Second operand 9 states and 236 transitions. [2024-06-27 19:37:07,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 605 transitions, 7882 flow [2024-06-27 19:37:15,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 605 transitions, 7532 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 19:37:15,821 INFO L231 Difference]: Finished difference. Result has 476 places, 567 transitions, 6542 flow [2024-06-27 19:37:15,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6224, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6542, PETRI_PLACES=476, PETRI_TRANSITIONS=567} [2024-06-27 19:37:15,822 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 434 predicate places. [2024-06-27 19:37:15,822 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 567 transitions, 6542 flow [2024-06-27 19:37:15,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:15,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:15,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:15,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-27 19:37:15,822 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 19:37:15,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:15,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1110801814, now seen corresponding path program 1 times [2024-06-27 19:37:15,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:15,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77070481] [2024-06-27 19:37:15,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:15,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:15,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:15,913 INFO 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 19:37:15,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:15,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77070481] [2024-06-27 19:37:15,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77070481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:15,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:15,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:15,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113190493] [2024-06-27 19:37:15,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:15,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:15,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:15,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:15,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:15,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:37:15,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 567 transitions, 6542 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:15,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:15,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:37:15,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:17,534 INFO L124 PetriNetUnfolderBase]: 3631/6233 cut-off events. [2024-06-27 19:37:17,534 INFO L125 PetriNetUnfolderBase]: For 1632400/1632400 co-relation queries the response was YES. [2024-06-27 19:37:17,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48112 conditions, 6233 events. 3631/6233 cut-off events. For 1632400/1632400 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 43715 event pairs, 872 based on Foata normal form. 6/6231 useless extension candidates. Maximal degree in co-relation 47884. Up to 5279 conditions per place. [2024-06-27 19:37:17,629 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 476 selfloop transitions, 108 changer transitions 0/592 dead transitions. [2024-06-27 19:37:17,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 592 transitions, 7810 flow [2024-06-27 19:37:17,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:37:17,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:37:17,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-27 19:37:17,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658536585365853 [2024-06-27 19:37:17,630 INFO L175 Difference]: Start difference. First operand has 476 places, 567 transitions, 6542 flow. Second operand 10 states and 232 transitions. [2024-06-27 19:37:17,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 592 transitions, 7810 flow [2024-06-27 19:37:27,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 592 transitions, 7488 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 19:37:27,953 INFO L231 Difference]: Finished difference. Result has 478 places, 568 transitions, 6470 flow [2024-06-27 19:37:27,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6220, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6470, PETRI_PLACES=478, PETRI_TRANSITIONS=568} [2024-06-27 19:37:27,954 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 436 predicate places. [2024-06-27 19:37:27,954 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 568 transitions, 6470 flow [2024-06-27 19:37:27,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:27,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:27,954 INFO L208 CegarLoopForPetriNet]: trace 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 19:37:27,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-27 19:37:27,955 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 19:37:27,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:27,955 INFO L85 PathProgramCache]: Analyzing trace with hash 667980454, now seen corresponding path program 2 times [2024-06-27 19:37:27,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:27,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80637051] [2024-06-27 19:37:27,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:27,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:28,025 INFO 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 19:37:28,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:28,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80637051] [2024-06-27 19:37:28,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80637051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:28,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:28,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:28,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302556015] [2024-06-27 19:37:28,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:28,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:28,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:28,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:28,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:28,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:37:28,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 568 transitions, 6470 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:28,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:28,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:37:28,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:29,679 INFO L124 PetriNetUnfolderBase]: 3651/6267 cut-off events. [2024-06-27 19:37:29,679 INFO L125 PetriNetUnfolderBase]: For 1633504/1633504 co-relation queries the response was YES. [2024-06-27 19:37:29,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48238 conditions, 6267 events. 3651/6267 cut-off events. For 1633504/1633504 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 43927 event pairs, 843 based on Foata normal form. 6/6265 useless extension candidates. Maximal degree in co-relation 48009. Up to 4884 conditions per place. [2024-06-27 19:37:29,779 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 476 selfloop transitions, 112 changer transitions 0/596 dead transitions. [2024-06-27 19:37:29,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 596 transitions, 8098 flow [2024-06-27 19:37:29,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:29,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:29,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-27 19:37:29,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2024-06-27 19:37:29,780 INFO L175 Difference]: Start difference. First operand has 478 places, 568 transitions, 6470 flow. Second operand 9 states and 215 transitions. [2024-06-27 19:37:29,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 596 transitions, 8098 flow [2024-06-27 19:37:38,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 596 transitions, 7858 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-27 19:37:38,901 INFO L231 Difference]: Finished difference. Result has 479 places, 569 transitions, 6488 flow [2024-06-27 19:37:38,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6230, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6488, PETRI_PLACES=479, PETRI_TRANSITIONS=569} [2024-06-27 19:37:38,902 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 437 predicate places. [2024-06-27 19:37:38,902 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 569 transitions, 6488 flow [2024-06-27 19:37:38,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:38,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:38,902 INFO L208 CegarLoopForPetriNet]: trace 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 19:37:38,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-27 19:37:38,902 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 19:37:38,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:38,902 INFO L85 PathProgramCache]: Analyzing trace with hash -509994738, now seen corresponding path program 3 times [2024-06-27 19:37:38,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:38,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893599865] [2024-06-27 19:37:38,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:38,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:38,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:38,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:38,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893599865] [2024-06-27 19:37:38,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893599865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:38,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:38,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:38,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865706136] [2024-06-27 19:37:38,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:38,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:38,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:38,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:38,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:39,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:37:39,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 569 transitions, 6488 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:39,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:39,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:37:39,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:40,587 INFO L124 PetriNetUnfolderBase]: 3638/6248 cut-off events. [2024-06-27 19:37:40,587 INFO L125 PetriNetUnfolderBase]: For 1564424/1564424 co-relation queries the response was YES. [2024-06-27 19:37:40,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47167 conditions, 6248 events. 3638/6248 cut-off events. For 1564424/1564424 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 43765 event pairs, 837 based on Foata normal form. 6/6246 useless extension candidates. Maximal degree in co-relation 46937. Up to 4878 conditions per place. [2024-06-27 19:37:40,683 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 472 selfloop transitions, 116 changer transitions 0/596 dead transitions. [2024-06-27 19:37:40,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 596 transitions, 7756 flow [2024-06-27 19:37:40,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:40,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:40,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-27 19:37:40,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-27 19:37:40,684 INFO L175 Difference]: Start difference. First operand has 479 places, 569 transitions, 6488 flow. Second operand 9 states and 216 transitions. [2024-06-27 19:37:40,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 596 transitions, 7756 flow [2024-06-27 19:37:50,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 596 transitions, 7489 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 19:37:50,011 INFO L231 Difference]: Finished difference. Result has 482 places, 569 transitions, 6457 flow [2024-06-27 19:37:50,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6221, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6457, PETRI_PLACES=482, PETRI_TRANSITIONS=569} [2024-06-27 19:37:50,011 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 440 predicate places. [2024-06-27 19:37:50,011 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 569 transitions, 6457 flow [2024-06-27 19:37:50,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:50,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:50,011 INFO L208 CegarLoopForPetriNet]: trace 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 19:37:50,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-27 19:37:50,012 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 19:37:50,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:50,012 INFO L85 PathProgramCache]: Analyzing trace with hash -278880008, now seen corresponding path program 4 times [2024-06-27 19:37:50,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:50,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276237996] [2024-06-27 19:37:50,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:50,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:50,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:50,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:50,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:50,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276237996] [2024-06-27 19:37:50,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276237996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:50,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:50,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:37:50,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661223212] [2024-06-27 19:37:50,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:50,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:37:50,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:50,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:37:50,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:37:50,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:37:50,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 569 transitions, 6457 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:50,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:50,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:37:50,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:51,714 INFO L124 PetriNetUnfolderBase]: 3625/6223 cut-off events. [2024-06-27 19:37:51,714 INFO L125 PetriNetUnfolderBase]: For 1491666/1491666 co-relation queries the response was YES. [2024-06-27 19:37:51,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45862 conditions, 6223 events. 3625/6223 cut-off events. For 1491666/1491666 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 43661 event pairs, 607 based on Foata normal form. 6/6224 useless extension candidates. Maximal degree in co-relation 45631. Up to 4763 conditions per place. [2024-06-27 19:37:51,811 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 495 selfloop transitions, 107 changer transitions 1/611 dead transitions. [2024-06-27 19:37:51,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 611 transitions, 7832 flow [2024-06-27 19:37:51,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:37:51,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:37:51,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-27 19:37:51,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6615853658536586 [2024-06-27 19:37:51,812 INFO L175 Difference]: Start difference. First operand has 482 places, 569 transitions, 6457 flow. Second operand 8 states and 217 transitions. [2024-06-27 19:37:51,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 611 transitions, 7832 flow [2024-06-27 19:38:00,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 611 transitions, 7563 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-27 19:38:00,894 INFO L231 Difference]: Finished difference. Result has 482 places, 570 transitions, 6445 flow [2024-06-27 19:38:00,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6202, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6445, PETRI_PLACES=482, PETRI_TRANSITIONS=570} [2024-06-27 19:38:00,894 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 440 predicate places. [2024-06-27 19:38:00,894 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 570 transitions, 6445 flow [2024-06-27 19:38:00,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:00,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:00,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:00,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-27 19:38:00,895 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 19:38:00,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:00,895 INFO L85 PathProgramCache]: Analyzing trace with hash -262958408, now seen corresponding path program 5 times [2024-06-27 19:38:00,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:00,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476812021] [2024-06-27 19:38:00,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:00,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:00,974 INFO 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 19:38:00,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:00,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476812021] [2024-06-27 19:38:00,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476812021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:00,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:00,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:38:00,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563684878] [2024-06-27 19:38:00,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:00,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:38:00,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:00,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:38:00,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:38:01,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:38:01,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 570 transitions, 6445 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:01,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:01,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:38:01,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:02,584 INFO L124 PetriNetUnfolderBase]: 3645/6273 cut-off events. [2024-06-27 19:38:02,585 INFO L125 PetriNetUnfolderBase]: For 1507036/1507036 co-relation queries the response was YES. [2024-06-27 19:38:02,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46056 conditions, 6273 events. 3645/6273 cut-off events. For 1507036/1507036 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 44139 event pairs, 547 based on Foata normal form. 6/6273 useless extension candidates. Maximal degree in co-relation 45824. Up to 3958 conditions per place. [2024-06-27 19:38:02,685 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 492 selfloop transitions, 108 changer transitions 0/608 dead transitions. [2024-06-27 19:38:02,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 608 transitions, 8525 flow [2024-06-27 19:38:02,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:38:02,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:38:02,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-27 19:38:02,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.662020905923345 [2024-06-27 19:38:02,686 INFO L175 Difference]: Start difference. First operand has 482 places, 570 transitions, 6445 flow. Second operand 7 states and 190 transitions. [2024-06-27 19:38:02,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 608 transitions, 8525 flow [2024-06-27 19:38:12,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 608 transitions, 8343 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 19:38:12,679 INFO L231 Difference]: Finished difference. Result has 483 places, 572 transitions, 6551 flow [2024-06-27 19:38:12,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6267, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6551, PETRI_PLACES=483, PETRI_TRANSITIONS=572} [2024-06-27 19:38:12,679 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 441 predicate places. [2024-06-27 19:38:12,679 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 572 transitions, 6551 flow [2024-06-27 19:38:12,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:12,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:12,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:12,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-27 19:38:12,679 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 19:38:12,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:12,680 INFO L85 PathProgramCache]: Analyzing trace with hash -511799098, now seen corresponding path program 6 times [2024-06-27 19:38:12,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:12,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132741354] [2024-06-27 19:38:12,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:12,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:12,745 INFO 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 19:38:12,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:12,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132741354] [2024-06-27 19:38:12,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132741354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:12,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:12,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:38:12,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798670399] [2024-06-27 19:38:12,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:12,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:38:12,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:12,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:38:12,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:38:12,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:38:12,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 572 transitions, 6551 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:12,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:12,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:38:12,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:14,381 INFO L124 PetriNetUnfolderBase]: 3632/6251 cut-off events. [2024-06-27 19:38:14,381 INFO L125 PetriNetUnfolderBase]: For 1420248/1420248 co-relation queries the response was YES. [2024-06-27 19:38:14,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45088 conditions, 6251 events. 3632/6251 cut-off events. For 1420248/1420248 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 43957 event pairs, 580 based on Foata normal form. 6/6251 useless extension candidates. Maximal degree in co-relation 44856. Up to 3952 conditions per place. [2024-06-27 19:38:14,481 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 490 selfloop transitions, 108 changer transitions 0/606 dead transitions. [2024-06-27 19:38:14,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 606 transitions, 8213 flow [2024-06-27 19:38:14,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:38:14,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:38:14,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-27 19:38:14,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-27 19:38:14,482 INFO L175 Difference]: Start difference. First operand has 483 places, 572 transitions, 6551 flow. Second operand 7 states and 189 transitions. [2024-06-27 19:38:14,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 606 transitions, 8213 flow [2024-06-27 19:38:25,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 606 transitions, 8021 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-27 19:38:25,100 INFO L231 Difference]: Finished difference. Result has 487 places, 572 transitions, 6581 flow [2024-06-27 19:38:25,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6359, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6581, PETRI_PLACES=487, PETRI_TRANSITIONS=572} [2024-06-27 19:38:25,101 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-27 19:38:25,101 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 572 transitions, 6581 flow [2024-06-27 19:38:25,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:25,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:25,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:25,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-27 19:38:25,101 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 19:38:25,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:25,101 INFO L85 PathProgramCache]: Analyzing trace with hash -785980906, now seen corresponding path program 1 times [2024-06-27 19:38:25,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:25,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830627296] [2024-06-27 19:38:25,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:25,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:25,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:25,176 INFO 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 19:38:25,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:25,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830627296] [2024-06-27 19:38:25,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830627296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:25,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:25,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:25,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331042718] [2024-06-27 19:38:25,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:25,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:25,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:25,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:25,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:25,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:38:25,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 572 transitions, 6581 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:25,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:25,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:38:25,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:26,845 INFO L124 PetriNetUnfolderBase]: 3685/6337 cut-off events. [2024-06-27 19:38:26,846 INFO L125 PetriNetUnfolderBase]: For 1528936/1528936 co-relation queries the response was YES. [2024-06-27 19:38:26,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46598 conditions, 6337 events. 3685/6337 cut-off events. For 1528936/1528936 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 44565 event pairs, 643 based on Foata normal form. 6/6338 useless extension candidates. Maximal degree in co-relation 46365. Up to 4943 conditions per place. [2024-06-27 19:38:26,945 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 557 selfloop transitions, 55 changer transitions 4/624 dead transitions. [2024-06-27 19:38:26,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 624 transitions, 8713 flow [2024-06-27 19:38:26,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:38:26,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:38:26,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-27 19:38:26,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6314363143631436 [2024-06-27 19:38:26,949 INFO L175 Difference]: Start difference. First operand has 487 places, 572 transitions, 6581 flow. Second operand 9 states and 233 transitions. [2024-06-27 19:38:26,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 624 transitions, 8713 flow [2024-06-27 19:38:36,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 624 transitions, 8501 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 19:38:36,669 INFO L231 Difference]: Finished difference. Result has 491 places, 574 transitions, 6527 flow [2024-06-27 19:38:36,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6369, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6527, PETRI_PLACES=491, PETRI_TRANSITIONS=574} [2024-06-27 19:38:36,670 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 449 predicate places. [2024-06-27 19:38:36,670 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 574 transitions, 6527 flow [2024-06-27 19:38:36,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:36,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:36,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:36,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-27 19:38:36,670 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 19:38:36,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:36,671 INFO L85 PathProgramCache]: Analyzing trace with hash 772179800, now seen corresponding path program 2 times [2024-06-27 19:38:36,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:36,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598260382] [2024-06-27 19:38:36,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:36,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:36,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:36,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:36,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:36,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598260382] [2024-06-27 19:38:36,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598260382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:36,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:36,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:38:36,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315549719] [2024-06-27 19:38:36,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:36,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:38:36,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:36,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:38:36,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:38:36,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:38:36,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 574 transitions, 6527 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:36,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:36,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:38:36,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:38,459 INFO L124 PetriNetUnfolderBase]: 3705/6377 cut-off events. [2024-06-27 19:38:38,460 INFO L125 PetriNetUnfolderBase]: For 1543559/1543559 co-relation queries the response was YES. [2024-06-27 19:38:38,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46580 conditions, 6377 events. 3705/6377 cut-off events. For 1543559/1543559 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 44895 event pairs, 685 based on Foata normal form. 6/6370 useless extension candidates. Maximal degree in co-relation 46346. Up to 4955 conditions per place. [2024-06-27 19:38:38,814 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 557 selfloop transitions, 55 changer transitions 4/624 dead transitions. [2024-06-27 19:38:38,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 624 transitions, 8287 flow [2024-06-27 19:38:38,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:38:38,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:38:38,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 250 transitions. [2024-06-27 19:38:38,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:38:38,815 INFO L175 Difference]: Start difference. First operand has 491 places, 574 transitions, 6527 flow. Second operand 10 states and 250 transitions. [2024-06-27 19:38:38,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 624 transitions, 8287 flow [2024-06-27 19:38:48,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 624 transitions, 8190 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 19:38:48,180 INFO L231 Difference]: Finished difference. Result has 496 places, 575 transitions, 6568 flow [2024-06-27 19:38:48,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6435, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6568, PETRI_PLACES=496, PETRI_TRANSITIONS=575} [2024-06-27 19:38:48,181 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 454 predicate places. [2024-06-27 19:38:48,181 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 575 transitions, 6568 flow [2024-06-27 19:38:48,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:48,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:48,181 INFO L208 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 19:38:48,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-27 19:38:48,181 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 19:38:48,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:48,181 INFO L85 PathProgramCache]: Analyzing trace with hash 772179986, now seen corresponding path program 1 times [2024-06-27 19:38:48,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:48,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442322502] [2024-06-27 19:38:48,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:48,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:48,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:48,250 INFO 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 19:38:48,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:48,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442322502] [2024-06-27 19:38:48,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442322502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:48,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:48,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:48,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145784666] [2024-06-27 19:38:48,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:48,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:48,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:48,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:48,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:48,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:38:48,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 575 transitions, 6568 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:48,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:48,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:38:48,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:50,176 INFO L124 PetriNetUnfolderBase]: 3931/6760 cut-off events. [2024-06-27 19:38:50,176 INFO L125 PetriNetUnfolderBase]: For 2196541/2196541 co-relation queries the response was YES. [2024-06-27 19:38:50,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56363 conditions, 6760 events. 3931/6760 cut-off events. For 2196541/2196541 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 47949 event pairs, 881 based on Foata normal form. 6/6760 useless extension candidates. Maximal degree in co-relation 56128. Up to 2891 conditions per place. [2024-06-27 19:38:50,280 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 434 selfloop transitions, 172 changer transitions 0/614 dead transitions. [2024-06-27 19:38:50,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 614 transitions, 8790 flow [2024-06-27 19:38:50,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:38:50,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:38:50,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 19:38:50,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-27 19:38:50,281 INFO L175 Difference]: Start difference. First operand has 496 places, 575 transitions, 6568 flow. Second operand 8 states and 206 transitions. [2024-06-27 19:38:50,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 614 transitions, 8790 flow [2024-06-27 19:39:02,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 614 transitions, 8668 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 19:39:02,567 INFO L231 Difference]: Finished difference. Result has 497 places, 577 transitions, 6938 flow [2024-06-27 19:39:02,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6446, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6938, PETRI_PLACES=497, PETRI_TRANSITIONS=577} [2024-06-27 19:39:02,567 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 455 predicate places. [2024-06-27 19:39:02,568 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 577 transitions, 6938 flow [2024-06-27 19:39:02,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:02,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:02,568 INFO L208 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 19:39:02,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-27 19:39:02,568 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 19:39:02,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:02,568 INFO L85 PathProgramCache]: Analyzing trace with hash -608492080, now seen corresponding path program 2 times [2024-06-27 19:39:02,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:02,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197740626] [2024-06-27 19:39:02,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:02,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:02,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:02,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:02,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197740626] [2024-06-27 19:39:02,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197740626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:02,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:02,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:02,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411271281] [2024-06-27 19:39:02,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:02,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:02,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:02,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:02,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:02,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:39:02,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 577 transitions, 6938 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:02,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:02,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:39:02,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:04,743 INFO L124 PetriNetUnfolderBase]: 4032/6954 cut-off events. [2024-06-27 19:39:04,743 INFO L125 PetriNetUnfolderBase]: For 2513145/2513145 co-relation queries the response was YES. [2024-06-27 19:39:04,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61399 conditions, 6954 events. 4032/6954 cut-off events. For 2513145/2513145 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 49596 event pairs, 814 based on Foata normal form. 6/6954 useless extension candidates. Maximal degree in co-relation 61162. Up to 5725 conditions per place. [2024-06-27 19:39:04,856 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 577 selfloop transitions, 30 changer transitions 0/615 dead transitions. [2024-06-27 19:39:04,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 615 transitions, 9061 flow [2024-06-27 19:39:04,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:39:04,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:39:04,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-27 19:39:04,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-27 19:39:04,857 INFO L175 Difference]: Start difference. First operand has 497 places, 577 transitions, 6938 flow. Second operand 9 states and 213 transitions. [2024-06-27 19:39:04,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 615 transitions, 9061 flow Killed by 15