./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe018_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/mutex-meet-rel/safe018_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe018_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe018_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-eb4cb34-m [2024-06-21 18:13:12,874 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 18:13:12,938 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 18:13:12,943 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 18:13:12,944 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 18:13:12,973 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 18:13:12,973 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 18:13:12,973 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 18:13:12,974 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 18:13:12,977 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 18:13:12,977 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 18:13:12,978 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 18:13:12,978 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 18:13:12,979 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 18:13:12,980 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 18:13:12,980 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 18:13:12,980 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 18:13:12,980 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 18:13:12,980 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 18:13:12,981 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 18:13:12,981 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 18:13:12,981 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 18:13:12,981 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 18:13:12,982 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 18:13:12,982 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 18:13:12,982 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 18:13:12,982 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 18:13:12,983 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 18:13:12,983 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 18:13:12,983 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 18:13:12,984 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 18:13:12,984 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 18:13:12,984 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:13:12,985 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 18:13:12,985 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 18:13:12,985 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 18:13:12,985 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 18:13:12,985 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 18:13:12,986 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 18:13:12,986 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 18:13:12,986 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 18:13:12,986 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 18:13:12,986 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 18:13:12,987 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 18:13:13,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 18:13:13,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 18:13:13,243 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 18:13:13,244 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 18:13:13,245 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 18:13:13,246 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe018_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 18:13:14,355 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 18:13:14,582 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 18:13:14,583 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe018_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 18:13:14,596 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd74a0c4f/8dcaf8ac40ce4a479290479ab1eba137/FLAG700d3256b [2024-06-21 18:13:14,607 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd74a0c4f/8dcaf8ac40ce4a479290479ab1eba137 [2024-06-21 18:13:14,609 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 18:13:14,609 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 18:13:14,610 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe018_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-21 18:13:14,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 18:13:14,684 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 18:13:14,685 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 18:13:14,685 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 18:13:14,689 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 18:13:14,690 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:13:14" (1/2) ... [2024-06-21 18:13:14,691 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d63e85d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:14, skipping insertion in model container [2024-06-21 18:13:14,691 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:13:14" (1/2) ... [2024-06-21 18:13:14,693 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@453ab51e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:13:14, skipping insertion in model container [2024-06-21 18:13:14,693 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:13:14" (2/2) ... [2024-06-21 18:13:14,694 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d63e85d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:14, skipping insertion in model container [2024-06-21 18:13:14,694 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:13:14" (2/2) ... [2024-06-21 18:13:14,694 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 18:13:14,717 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 18:13:14,718 INFO L97 edCorrectnessWitness]: Location invariant before [L780-L780] ! multithreaded || (((0LL - (long long )__unbuffered_p0_EAX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )x >= 0LL) [2024-06-21 18:13:14,719 INFO L97 edCorrectnessWitness]: Location invariant before [L778-L778] ! multithreaded || (((0LL - (long long )__unbuffered_p0_EAX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )x >= 0LL) [2024-06-21 18:13:14,719 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] ! multithreaded || (((0LL - (long long )__unbuffered_p0_EAX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )x >= 0LL) [2024-06-21 18:13:14,719 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 18:13:14,719 INFO L106 edCorrectnessWitness]: ghost_update [L776-L776] multithreaded = 1; [2024-06-21 18:13:14,757 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 18:13:15,018 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:13:15,026 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 18:13:15,085 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:13:15,109 INFO L206 MainTranslator]: Completed translation [2024-06-21 18:13:15,110 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:15 WrapperNode [2024-06-21 18:13:15,110 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 18:13:15,111 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 18:13:15,111 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 18:13:15,111 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 18:13:15,116 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:15" (1/1) ... [2024-06-21 18:13:15,125 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:15" (1/1) ... [2024-06-21 18:13:15,139 INFO L138 Inliner]: procedures = 175, calls = 40, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-21 18:13:15,140 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 18:13:15,140 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 18:13:15,141 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 18:13:15,141 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 18:13:15,148 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:15" (1/1) ... [2024-06-21 18:13:15,149 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:15" (1/1) ... [2024-06-21 18:13:15,151 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:15" (1/1) ... [2024-06-21 18:13:15,161 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 18:13:15,161 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:15" (1/1) ... [2024-06-21 18:13:15,161 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:15" (1/1) ... [2024-06-21 18:13:15,164 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:15" (1/1) ... [2024-06-21 18:13:15,166 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:15" (1/1) ... [2024-06-21 18:13:15,173 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:15" (1/1) ... [2024-06-21 18:13:15,174 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:15" (1/1) ... [2024-06-21 18:13:15,176 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 18:13:15,177 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 18:13:15,177 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 18:13:15,177 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 18:13:15,178 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:15" (1/1) ... [2024-06-21 18:13:15,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:13:15,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 18:13:15,201 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 18:13:15,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 18:13:15,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 18:13:15,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 18:13:15,229 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 18:13:15,229 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 18:13:15,229 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 18:13:15,229 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 18:13:15,229 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 18:13:15,229 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 18:13:15,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 18:13:15,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 18:13:15,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 18:13:15,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 18:13:15,231 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 18:13:15,317 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 18:13:15,319 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 18:13:15,467 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 18:13:15,467 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 18:13:15,525 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 18:13:15,525 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 18:13:15,525 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:13:15 BoogieIcfgContainer [2024-06-21 18:13:15,526 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 18:13:15,527 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 18:13:15,527 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 18:13:15,539 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 18:13:15,539 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 06:13:14" (1/4) ... [2024-06-21 18:13:15,540 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b1fa9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 06:13:15, skipping insertion in model container [2024-06-21 18:13:15,540 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:13:14" (2/4) ... [2024-06-21 18:13:15,540 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b1fa9f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 06:13:15, skipping insertion in model container [2024-06-21 18:13:15,540 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:13:15" (3/4) ... [2024-06-21 18:13:15,542 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b1fa9f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 06:13:15, skipping insertion in model container [2024-06-21 18:13:15,543 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:13:15" (4/4) ... [2024-06-21 18:13:15,544 INFO L112 eAbstractionObserver]: Analyzing ICFG safe018_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 18:13:15,558 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 18:13:15,558 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 18:13:15,558 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 18:13:15,608 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 18:13:15,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 39 transitions, 90 flow [2024-06-21 18:13:15,654 INFO L124 PetriNetUnfolderBase]: 0/36 cut-off events. [2024-06-21 18:13:15,654 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:13:15,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 36 events. 0/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 18:13:15,656 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 39 transitions, 90 flow [2024-06-21 18:13:15,658 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 30 transitions, 69 flow [2024-06-21 18:13:15,665 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 18:13:15,670 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;@2ed6f927, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 18:13:15,670 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 18:13:15,673 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 18:13:15,673 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 18:13:15,673 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:13:15,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:15,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 18:13:15,675 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:15,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:15,679 INFO L85 PathProgramCache]: Analyzing trace with hash 217842636, now seen corresponding path program 1 times [2024-06-21 18:13:15,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:15,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201236495] [2024-06-21 18:13:15,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:15,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:15,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:15,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:15,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:15,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201236495] [2024-06-21 18:13:15,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201236495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:15,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:15,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 18:13:15,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342444793] [2024-06-21 18:13:15,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:15,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 18:13:15,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:15,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 18:13:15,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 18:13:15,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 39 [2024-06-21 18:13:15,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:15,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:15,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 39 [2024-06-21 18:13:15,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:16,034 INFO L124 PetriNetUnfolderBase]: 105/242 cut-off events. [2024-06-21 18:13:16,034 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-21 18:13:16,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 242 events. 105/242 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1234 event pairs, 33 based on Foata normal form. 2/223 useless extension candidates. Maximal degree in co-relation 439. Up to 163 conditions per place. [2024-06-21 18:13:16,039 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 20 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2024-06-21 18:13:16,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 36 transitions, 130 flow [2024-06-21 18:13:16,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 18:13:16,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 18:13:16,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-06-21 18:13:16,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7350427350427351 [2024-06-21 18:13:16,050 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 69 flow. Second operand 3 states and 86 transitions. [2024-06-21 18:13:16,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 36 transitions, 130 flow [2024-06-21 18:13:16,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 36 transitions, 126 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:16,055 INFO L231 Difference]: Finished difference. Result has 39 places, 31 transitions, 85 flow [2024-06-21 18:13:16,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=39, PETRI_TRANSITIONS=31} [2024-06-21 18:13:16,059 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -1 predicate places. [2024-06-21 18:13:16,060 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 31 transitions, 85 flow [2024-06-21 18:13:16,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:16,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:16,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:16,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 18:13:16,061 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:16,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:16,061 INFO L85 PathProgramCache]: Analyzing trace with hash 962376706, now seen corresponding path program 1 times [2024-06-21 18:13:16,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:16,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972300426] [2024-06-21 18:13:16,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:16,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:16,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:16,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:16,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:16,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972300426] [2024-06-21 18:13:16,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972300426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:16,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:16,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 18:13:16,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707359560] [2024-06-21 18:13:16,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:16,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 18:13:16,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:16,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 18:13:16,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 18:13:16,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 39 [2024-06-21 18:13:16,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 85 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:16,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:16,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 39 [2024-06-21 18:13:16,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:16,313 INFO L124 PetriNetUnfolderBase]: 215/443 cut-off events. [2024-06-21 18:13:16,313 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-06-21 18:13:16,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 952 conditions, 443 events. 215/443 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2295 event pairs, 85 based on Foata normal form. 4/426 useless extension candidates. Maximal degree in co-relation 940. Up to 330 conditions per place. [2024-06-21 18:13:16,318 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 31 selfloop transitions, 6 changer transitions 0/48 dead transitions. [2024-06-21 18:13:16,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 48 transitions, 202 flow [2024-06-21 18:13:16,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:13:16,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:13:16,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-06-21 18:13:16,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6987179487179487 [2024-06-21 18:13:16,322 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 85 flow. Second operand 4 states and 109 transitions. [2024-06-21 18:13:16,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 48 transitions, 202 flow [2024-06-21 18:13:16,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 198 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 18:13:16,327 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 123 flow [2024-06-21 18:13:16,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 18:13:16,328 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2024-06-21 18:13:16,328 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 123 flow [2024-06-21 18:13:16,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:16,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:16,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:16,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 18:13:16,331 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:16,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:16,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1252528375, now seen corresponding path program 1 times [2024-06-21 18:13:16,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:16,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133281103] [2024-06-21 18:13:16,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:16,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:16,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:16,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:16,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:16,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133281103] [2024-06-21 18:13:16,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133281103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:16,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:16,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:16,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707784744] [2024-06-21 18:13:16,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:16,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:16,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:16,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:16,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:16,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-21 18:13:16,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 123 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:16,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:16,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-21 18:13:16,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:16,621 INFO L124 PetriNetUnfolderBase]: 349/710 cut-off events. [2024-06-21 18:13:16,621 INFO L125 PetriNetUnfolderBase]: For 310/312 co-relation queries the response was YES. [2024-06-21 18:13:16,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1662 conditions, 710 events. 349/710 cut-off events. For 310/312 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4046 event pairs, 49 based on Foata normal form. 16/703 useless extension candidates. Maximal degree in co-relation 1647. Up to 375 conditions per place. [2024-06-21 18:13:16,629 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 35 selfloop transitions, 9 changer transitions 0/54 dead transitions. [2024-06-21 18:13:16,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 54 transitions, 261 flow [2024-06-21 18:13:16,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:13:16,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:13:16,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-06-21 18:13:16,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6987179487179487 [2024-06-21 18:13:16,634 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 123 flow. Second operand 4 states and 109 transitions. [2024-06-21 18:13:16,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 54 transitions, 261 flow [2024-06-21 18:13:16,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 261 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-21 18:13:16,639 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 170 flow [2024-06-21 18:13:16,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2024-06-21 18:13:16,640 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 7 predicate places. [2024-06-21 18:13:16,641 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 170 flow [2024-06-21 18:13:16,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:16,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:16,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:16,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 18:13:16,642 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:16,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:16,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1712926653, now seen corresponding path program 2 times [2024-06-21 18:13:16,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:16,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588215096] [2024-06-21 18:13:16,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:16,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:16,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:16,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:16,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:16,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588215096] [2024-06-21 18:13:16,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588215096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:16,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:16,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:16,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845588027] [2024-06-21 18:13:16,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:16,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:16,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:16,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:16,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:16,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-21 18:13:16,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:16,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:16,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-21 18:13:16,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:16,949 INFO L124 PetriNetUnfolderBase]: 337/690 cut-off events. [2024-06-21 18:13:16,950 INFO L125 PetriNetUnfolderBase]: For 601/603 co-relation queries the response was YES. [2024-06-21 18:13:16,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1827 conditions, 690 events. 337/690 cut-off events. For 601/603 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3871 event pairs, 41 based on Foata normal form. 8/679 useless extension candidates. Maximal degree in co-relation 1809. Up to 359 conditions per place. [2024-06-21 18:13:16,966 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 37 selfloop transitions, 9 changer transitions 0/56 dead transitions. [2024-06-21 18:13:16,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 56 transitions, 305 flow [2024-06-21 18:13:16,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:16,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:16,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-21 18:13:16,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6461538461538462 [2024-06-21 18:13:16,968 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 170 flow. Second operand 5 states and 126 transitions. [2024-06-21 18:13:16,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 56 transitions, 305 flow [2024-06-21 18:13:16,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 56 transitions, 286 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:16,971 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 187 flow [2024-06-21 18:13:16,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=187, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2024-06-21 18:13:16,972 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 9 predicate places. [2024-06-21 18:13:16,972 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 187 flow [2024-06-21 18:13:16,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:16,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:16,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:16,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 18:13:16,973 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:16,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:16,973 INFO L85 PathProgramCache]: Analyzing trace with hash -184619012, now seen corresponding path program 1 times [2024-06-21 18:13:16,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:16,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721530245] [2024-06-21 18:13:16,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:16,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:16,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:17,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:17,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:17,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721530245] [2024-06-21 18:13:17,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721530245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:17,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:17,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:13:17,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927147135] [2024-06-21 18:13:17,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:17,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:13:17,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:17,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:13:17,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:13:17,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 39 [2024-06-21 18:13:17,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 187 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:17,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:17,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 39 [2024-06-21 18:13:17,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:17,210 INFO L124 PetriNetUnfolderBase]: 302/642 cut-off events. [2024-06-21 18:13:17,210 INFO L125 PetriNetUnfolderBase]: For 528/531 co-relation queries the response was YES. [2024-06-21 18:13:17,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1672 conditions, 642 events. 302/642 cut-off events. For 528/531 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3584 event pairs, 101 based on Foata normal form. 5/629 useless extension candidates. Maximal degree in co-relation 1653. Up to 458 conditions per place. [2024-06-21 18:13:17,214 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 35 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-06-21 18:13:17,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 56 transitions, 335 flow [2024-06-21 18:13:17,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:13:17,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:13:17,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-21 18:13:17,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6730769230769231 [2024-06-21 18:13:17,215 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 187 flow. Second operand 4 states and 105 transitions. [2024-06-21 18:13:17,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 56 transitions, 335 flow [2024-06-21 18:13:17,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 56 transitions, 318 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-21 18:13:17,218 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 239 flow [2024-06-21 18:13:17,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=239, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2024-06-21 18:13:17,218 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 13 predicate places. [2024-06-21 18:13:17,219 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 239 flow [2024-06-21 18:13:17,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:17,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:17,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:17,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 18:13:17,219 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:17,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:17,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1432989834, now seen corresponding path program 1 times [2024-06-21 18:13:17,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:17,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926039669] [2024-06-21 18:13:17,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:17,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:17,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:17,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:17,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926039669] [2024-06-21 18:13:17,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926039669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:17,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:17,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:13:17,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692191873] [2024-06-21 18:13:17,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:17,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:13:17,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:17,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:13:17,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:13:17,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 39 [2024-06-21 18:13:17,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 239 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:17,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:17,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 39 [2024-06-21 18:13:17,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:17,388 INFO L124 PetriNetUnfolderBase]: 287/637 cut-off events. [2024-06-21 18:13:17,389 INFO L125 PetriNetUnfolderBase]: For 720/720 co-relation queries the response was YES. [2024-06-21 18:13:17,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1719 conditions, 637 events. 287/637 cut-off events. For 720/720 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3698 event pairs, 74 based on Foata normal form. 4/626 useless extension candidates. Maximal degree in co-relation 1697. Up to 400 conditions per place. [2024-06-21 18:13:17,392 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 38 selfloop transitions, 15 changer transitions 0/66 dead transitions. [2024-06-21 18:13:17,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 66 transitions, 417 flow [2024-06-21 18:13:17,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:17,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:17,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-21 18:13:17,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6717948717948717 [2024-06-21 18:13:17,393 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 239 flow. Second operand 5 states and 131 transitions. [2024-06-21 18:13:17,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 66 transitions, 417 flow [2024-06-21 18:13:17,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 66 transitions, 415 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-21 18:13:17,397 INFO L231 Difference]: Finished difference. Result has 60 places, 52 transitions, 337 flow [2024-06-21 18:13:17,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=337, PETRI_PLACES=60, PETRI_TRANSITIONS=52} [2024-06-21 18:13:17,397 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 20 predicate places. [2024-06-21 18:13:17,398 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 52 transitions, 337 flow [2024-06-21 18:13:17,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:17,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:17,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:17,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 18:13:17,398 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:17,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:17,399 INFO L85 PathProgramCache]: Analyzing trace with hash -746146405, now seen corresponding path program 1 times [2024-06-21 18:13:17,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:17,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417586344] [2024-06-21 18:13:17,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:17,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:17,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:17,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:17,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:17,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417586344] [2024-06-21 18:13:17,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417586344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:17,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:17,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:17,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728783278] [2024-06-21 18:13:17,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:17,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:17,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:17,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:17,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:17,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 39 [2024-06-21 18:13:17,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 52 transitions, 337 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:17,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:17,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 39 [2024-06-21 18:13:17,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:17,577 INFO L124 PetriNetUnfolderBase]: 305/652 cut-off events. [2024-06-21 18:13:17,577 INFO L125 PetriNetUnfolderBase]: For 1175/1178 co-relation queries the response was YES. [2024-06-21 18:13:17,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1947 conditions, 652 events. 305/652 cut-off events. For 1175/1178 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3809 event pairs, 77 based on Foata normal form. 9/647 useless extension candidates. Maximal degree in co-relation 1920. Up to 401 conditions per place. [2024-06-21 18:13:17,581 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 32 selfloop transitions, 13 changer transitions 0/61 dead transitions. [2024-06-21 18:13:17,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 61 transitions, 451 flow [2024-06-21 18:13:17,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:13:17,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:13:17,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-06-21 18:13:17,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-21 18:13:17,582 INFO L175 Difference]: Start difference. First operand has 60 places, 52 transitions, 337 flow. Second operand 4 states and 104 transitions. [2024-06-21 18:13:17,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 61 transitions, 451 flow [2024-06-21 18:13:17,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 61 transitions, 437 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-06-21 18:13:17,585 INFO L231 Difference]: Finished difference. Result has 64 places, 53 transitions, 365 flow [2024-06-21 18:13:17,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=365, PETRI_PLACES=64, PETRI_TRANSITIONS=53} [2024-06-21 18:13:17,586 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 24 predicate places. [2024-06-21 18:13:17,586 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 53 transitions, 365 flow [2024-06-21 18:13:17,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:17,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:17,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:17,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 18:13:17,587 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:17,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:17,588 INFO L85 PathProgramCache]: Analyzing trace with hash -745760455, now seen corresponding path program 2 times [2024-06-21 18:13:17,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:17,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681303074] [2024-06-21 18:13:17,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:17,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:17,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:17,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:17,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681303074] [2024-06-21 18:13:17,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681303074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:17,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:17,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:17,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186289070] [2024-06-21 18:13:17,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:17,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:17,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:17,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:17,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:17,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 39 [2024-06-21 18:13:17,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 53 transitions, 365 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:17,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:17,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 39 [2024-06-21 18:13:17,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:17,752 INFO L124 PetriNetUnfolderBase]: 292/633 cut-off events. [2024-06-21 18:13:17,753 INFO L125 PetriNetUnfolderBase]: For 1499/1502 co-relation queries the response was YES. [2024-06-21 18:13:17,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1937 conditions, 633 events. 292/633 cut-off events. For 1499/1502 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3641 event pairs, 73 based on Foata normal form. 9/630 useless extension candidates. Maximal degree in co-relation 1907. Up to 368 conditions per place. [2024-06-21 18:13:17,756 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 34 selfloop transitions, 14 changer transitions 0/64 dead transitions. [2024-06-21 18:13:17,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 64 transitions, 485 flow [2024-06-21 18:13:17,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:17,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:17,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-21 18:13:17,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-21 18:13:17,758 INFO L175 Difference]: Start difference. First operand has 64 places, 53 transitions, 365 flow. Second operand 5 states and 125 transitions. [2024-06-21 18:13:17,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 64 transitions, 485 flow [2024-06-21 18:13:17,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 64 transitions, 459 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 18:13:17,762 INFO L231 Difference]: Finished difference. Result has 67 places, 53 transitions, 371 flow [2024-06-21 18:13:17,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=371, PETRI_PLACES=67, PETRI_TRANSITIONS=53} [2024-06-21 18:13:17,763 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 27 predicate places. [2024-06-21 18:13:17,763 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 53 transitions, 371 flow [2024-06-21 18:13:17,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:17,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:17,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:17,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 18:13:17,764 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:17,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:17,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1333286653, now seen corresponding path program 1 times [2024-06-21 18:13:17,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:17,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024071487] [2024-06-21 18:13:17,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:17,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:17,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:17,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:17,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024071487] [2024-06-21 18:13:17,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024071487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:17,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:17,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:17,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951140139] [2024-06-21 18:13:17,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:17,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:17,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:17,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:17,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:17,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-21 18:13:17,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 53 transitions, 371 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:17,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:17,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-21 18:13:17,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:17,949 INFO L124 PetriNetUnfolderBase]: 341/718 cut-off events. [2024-06-21 18:13:17,950 INFO L125 PetriNetUnfolderBase]: For 1547/1547 co-relation queries the response was YES. [2024-06-21 18:13:17,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2237 conditions, 718 events. 341/718 cut-off events. For 1547/1547 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4072 event pairs, 93 based on Foata normal form. 4/703 useless extension candidates. Maximal degree in co-relation 2206. Up to 469 conditions per place. [2024-06-21 18:13:17,954 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 58 selfloop transitions, 11 changer transitions 0/79 dead transitions. [2024-06-21 18:13:17,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 79 transitions, 605 flow [2024-06-21 18:13:17,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:17,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:17,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 18:13:17,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-21 18:13:17,956 INFO L175 Difference]: Start difference. First operand has 67 places, 53 transitions, 371 flow. Second operand 6 states and 150 transitions. [2024-06-21 18:13:17,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 79 transitions, 605 flow [2024-06-21 18:13:17,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 79 transitions, 575 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:17,960 INFO L231 Difference]: Finished difference. Result has 72 places, 57 transitions, 403 flow [2024-06-21 18:13:17,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=403, PETRI_PLACES=72, PETRI_TRANSITIONS=57} [2024-06-21 18:13:17,960 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 32 predicate places. [2024-06-21 18:13:17,961 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 57 transitions, 403 flow [2024-06-21 18:13:17,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:17,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:17,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:17,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 18:13:17,961 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:17,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:17,962 INFO L85 PathProgramCache]: Analyzing trace with hash -560268083, now seen corresponding path program 2 times [2024-06-21 18:13:17,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:17,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014236530] [2024-06-21 18:13:17,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:17,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:18,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:18,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:18,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014236530] [2024-06-21 18:13:18,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014236530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:18,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:18,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:18,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559271617] [2024-06-21 18:13:18,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:18,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:18,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:18,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:18,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:18,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-21 18:13:18,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 57 transitions, 403 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:18,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:18,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-21 18:13:18,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:18,156 INFO L124 PetriNetUnfolderBase]: 353/746 cut-off events. [2024-06-21 18:13:18,156 INFO L125 PetriNetUnfolderBase]: For 1703/1703 co-relation queries the response was YES. [2024-06-21 18:13:18,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2369 conditions, 746 events. 353/746 cut-off events. For 1703/1703 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4326 event pairs, 89 based on Foata normal form. 4/730 useless extension candidates. Maximal degree in co-relation 2335. Up to 501 conditions per place. [2024-06-21 18:13:18,160 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 60 selfloop transitions, 12 changer transitions 0/82 dead transitions. [2024-06-21 18:13:18,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 82 transitions, 637 flow [2024-06-21 18:13:18,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:18,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:18,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 18:13:18,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6227106227106227 [2024-06-21 18:13:18,162 INFO L175 Difference]: Start difference. First operand has 72 places, 57 transitions, 403 flow. Second operand 7 states and 170 transitions. [2024-06-21 18:13:18,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 82 transitions, 637 flow [2024-06-21 18:13:18,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 82 transitions, 607 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:18,166 INFO L231 Difference]: Finished difference. Result has 77 places, 60 transitions, 429 flow [2024-06-21 18:13:18,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=429, PETRI_PLACES=77, PETRI_TRANSITIONS=60} [2024-06-21 18:13:18,167 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 37 predicate places. [2024-06-21 18:13:18,167 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 60 transitions, 429 flow [2024-06-21 18:13:18,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:18,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:18,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:18,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 18:13:18,168 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:18,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:18,168 INFO L85 PathProgramCache]: Analyzing trace with hash -745961893, now seen corresponding path program 3 times [2024-06-21 18:13:18,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:18,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811541153] [2024-06-21 18:13:18,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:18,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:18,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:18,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:18,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:18,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811541153] [2024-06-21 18:13:18,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811541153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:18,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:18,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:13:18,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663681875] [2024-06-21 18:13:18,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:18,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:13:18,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:18,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:13:18,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:13:18,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-21 18:13:18,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 60 transitions, 429 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:18,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:18,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-21 18:13:18,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:18,370 INFO L124 PetriNetUnfolderBase]: 345/738 cut-off events. [2024-06-21 18:13:18,371 INFO L125 PetriNetUnfolderBase]: For 1810/1810 co-relation queries the response was YES. [2024-06-21 18:13:18,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2302 conditions, 738 events. 345/738 cut-off events. For 1810/1810 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4301 event pairs, 87 based on Foata normal form. 4/724 useless extension candidates. Maximal degree in co-relation 2267. Up to 497 conditions per place. [2024-06-21 18:13:18,375 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 57 selfloop transitions, 11 changer transitions 0/78 dead transitions. [2024-06-21 18:13:18,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 78 transitions, 612 flow [2024-06-21 18:13:18,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:18,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:18,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-21 18:13:18,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6615384615384615 [2024-06-21 18:13:18,377 INFO L175 Difference]: Start difference. First operand has 77 places, 60 transitions, 429 flow. Second operand 5 states and 129 transitions. [2024-06-21 18:13:18,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 78 transitions, 612 flow [2024-06-21 18:13:18,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 78 transitions, 590 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:18,382 INFO L231 Difference]: Finished difference. Result has 78 places, 60 transitions, 433 flow [2024-06-21 18:13:18,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=433, PETRI_PLACES=78, PETRI_TRANSITIONS=60} [2024-06-21 18:13:18,382 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 38 predicate places. [2024-06-21 18:13:18,382 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 60 transitions, 433 flow [2024-06-21 18:13:18,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:18,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:18,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:18,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 18:13:18,383 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:18,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:18,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1225016827, now seen corresponding path program 1 times [2024-06-21 18:13:18,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:18,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069041599] [2024-06-21 18:13:18,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:18,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:18,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:18,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069041599] [2024-06-21 18:13:18,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069041599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:18,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:18,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:18,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401134003] [2024-06-21 18:13:18,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:18,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:18,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:18,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:18,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:18,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-21 18:13:18,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 60 transitions, 433 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:18,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:18,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-21 18:13:18,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:18,609 INFO L124 PetriNetUnfolderBase]: 357/754 cut-off events. [2024-06-21 18:13:18,609 INFO L125 PetriNetUnfolderBase]: For 2093/2095 co-relation queries the response was YES. [2024-06-21 18:13:18,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2389 conditions, 754 events. 357/754 cut-off events. For 2093/2095 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4444 event pairs, 51 based on Foata normal form. 4/741 useless extension candidates. Maximal degree in co-relation 2353. Up to 355 conditions per place. [2024-06-21 18:13:18,614 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 43 selfloop transitions, 22 changer transitions 0/75 dead transitions. [2024-06-21 18:13:18,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 75 transitions, 603 flow [2024-06-21 18:13:18,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:18,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:18,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-21 18:13:18,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-21 18:13:18,615 INFO L175 Difference]: Start difference. First operand has 78 places, 60 transitions, 433 flow. Second operand 5 states and 130 transitions. [2024-06-21 18:13:18,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 75 transitions, 603 flow [2024-06-21 18:13:18,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 75 transitions, 581 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:18,621 INFO L231 Difference]: Finished difference. Result has 79 places, 61 transitions, 474 flow [2024-06-21 18:13:18,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=474, PETRI_PLACES=79, PETRI_TRANSITIONS=61} [2024-06-21 18:13:18,622 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 39 predicate places. [2024-06-21 18:13:18,622 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 61 transitions, 474 flow [2024-06-21 18:13:18,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:18,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:18,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:18,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 18:13:18,623 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:18,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:18,624 INFO L85 PathProgramCache]: Analyzing trace with hash 293519525, now seen corresponding path program 2 times [2024-06-21 18:13:18,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:18,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097462864] [2024-06-21 18:13:18,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:18,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:18,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:18,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:18,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097462864] [2024-06-21 18:13:18,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097462864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:18,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:18,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:18,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207898590] [2024-06-21 18:13:18,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:18,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:18,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:18,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:18,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:18,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-21 18:13:18,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 61 transitions, 474 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:18,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:18,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-21 18:13:18,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:18,850 INFO L124 PetriNetUnfolderBase]: 369/782 cut-off events. [2024-06-21 18:13:18,850 INFO L125 PetriNetUnfolderBase]: For 2542/2544 co-relation queries the response was YES. [2024-06-21 18:13:18,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2557 conditions, 782 events. 369/782 cut-off events. For 2542/2544 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4669 event pairs, 55 based on Foata normal form. 4/767 useless extension candidates. Maximal degree in co-relation 2520. Up to 281 conditions per place. [2024-06-21 18:13:18,855 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 48 selfloop transitions, 22 changer transitions 0/80 dead transitions. [2024-06-21 18:13:18,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 80 transitions, 684 flow [2024-06-21 18:13:18,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:18,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:18,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-21 18:13:18,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6367521367521367 [2024-06-21 18:13:18,857 INFO L175 Difference]: Start difference. First operand has 79 places, 61 transitions, 474 flow. Second operand 6 states and 149 transitions. [2024-06-21 18:13:18,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 80 transitions, 684 flow [2024-06-21 18:13:18,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 80 transitions, 635 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:18,865 INFO L231 Difference]: Finished difference. Result has 82 places, 62 transitions, 485 flow [2024-06-21 18:13:18,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=485, PETRI_PLACES=82, PETRI_TRANSITIONS=62} [2024-06-21 18:13:18,866 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 42 predicate places. [2024-06-21 18:13:18,866 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 62 transitions, 485 flow [2024-06-21 18:13:18,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:18,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:18,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:18,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 18:13:18,867 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)] === [2024-06-21 18:13:18,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:18,868 INFO L85 PathProgramCache]: Analyzing trace with hash 293788636, now seen corresponding path program 1 times [2024-06-21 18:13:18,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:18,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523651152] [2024-06-21 18:13:18,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:18,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:18,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:18,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:18,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523651152] [2024-06-21 18:13:18,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523651152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:18,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:18,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:18,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929860565] [2024-06-21 18:13:18,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:18,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:18,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:18,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:18,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:18,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-21 18:13:18,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 62 transitions, 485 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:18,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:18,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-21 18:13:18,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:19,101 INFO L124 PetriNetUnfolderBase]: 401/848 cut-off events. [2024-06-21 18:13:19,102 INFO L125 PetriNetUnfolderBase]: For 2895/2900 co-relation queries the response was YES. [2024-06-21 18:13:19,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2776 conditions, 848 events. 401/848 cut-off events. For 2895/2900 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5185 event pairs, 77 based on Foata normal form. 8/840 useless extension candidates. Maximal degree in co-relation 2738. Up to 445 conditions per place. [2024-06-21 18:13:19,107 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 52 selfloop transitions, 27 changer transitions 0/89 dead transitions. [2024-06-21 18:13:19,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 89 transitions, 745 flow [2024-06-21 18:13:19,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:19,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:19,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 18:13:19,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6282051282051282 [2024-06-21 18:13:19,109 INFO L175 Difference]: Start difference. First operand has 82 places, 62 transitions, 485 flow. Second operand 8 states and 196 transitions. [2024-06-21 18:13:19,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 89 transitions, 745 flow [2024-06-21 18:13:19,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 89 transitions, 702 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:19,115 INFO L231 Difference]: Finished difference. Result has 88 places, 66 transitions, 542 flow [2024-06-21 18:13:19,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=542, PETRI_PLACES=88, PETRI_TRANSITIONS=66} [2024-06-21 18:13:19,116 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 48 predicate places. [2024-06-21 18:13:19,117 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 66 transitions, 542 flow [2024-06-21 18:13:19,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:19,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:19,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:19,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 18:13:19,117 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:19,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:19,118 INFO L85 PathProgramCache]: Analyzing trace with hash 293788295, now seen corresponding path program 3 times [2024-06-21 18:13:19,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:19,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459568136] [2024-06-21 18:13:19,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:19,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:19,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:19,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:19,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:19,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459568136] [2024-06-21 18:13:19,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459568136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:19,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:19,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:19,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873415681] [2024-06-21 18:13:19,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:19,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:19,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:19,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:19,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:19,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-21 18:13:19,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 66 transitions, 542 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:19,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:19,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-21 18:13:19,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:19,339 INFO L124 PetriNetUnfolderBase]: 413/870 cut-off events. [2024-06-21 18:13:19,339 INFO L125 PetriNetUnfolderBase]: For 3250/3252 co-relation queries the response was YES. [2024-06-21 18:13:19,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2938 conditions, 870 events. 413/870 cut-off events. For 3250/3252 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 5381 event pairs, 69 based on Foata normal form. 4/844 useless extension candidates. Maximal degree in co-relation 2898. Up to 341 conditions per place. [2024-06-21 18:13:19,345 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 48 selfloop transitions, 24 changer transitions 0/82 dead transitions. [2024-06-21 18:13:19,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 82 transitions, 749 flow [2024-06-21 18:13:19,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:19,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:19,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-21 18:13:19,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6282051282051282 [2024-06-21 18:13:19,346 INFO L175 Difference]: Start difference. First operand has 88 places, 66 transitions, 542 flow. Second operand 6 states and 147 transitions. [2024-06-21 18:13:19,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 82 transitions, 749 flow [2024-06-21 18:13:19,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 82 transitions, 687 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:19,354 INFO L231 Difference]: Finished difference. Result has 89 places, 67 transitions, 543 flow [2024-06-21 18:13:19,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=543, PETRI_PLACES=89, PETRI_TRANSITIONS=67} [2024-06-21 18:13:19,355 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 49 predicate places. [2024-06-21 18:13:19,355 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 67 transitions, 543 flow [2024-06-21 18:13:19,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:19,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:19,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:19,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 18:13:19,356 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:19,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:19,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1206525771, now seen corresponding path program 4 times [2024-06-21 18:13:19,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:19,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742875732] [2024-06-21 18:13:19,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:19,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:19,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:19,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:19,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742875732] [2024-06-21 18:13:19,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742875732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:19,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:19,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:19,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879818506] [2024-06-21 18:13:19,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:19,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:19,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:19,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:19,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:19,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-21 18:13:19,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 67 transitions, 543 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:19,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:19,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-21 18:13:19,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:19,590 INFO L124 PetriNetUnfolderBase]: 405/858 cut-off events. [2024-06-21 18:13:19,591 INFO L125 PetriNetUnfolderBase]: For 2991/2993 co-relation queries the response was YES. [2024-06-21 18:13:19,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2824 conditions, 858 events. 405/858 cut-off events. For 2991/2993 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5299 event pairs, 51 based on Foata normal form. 4/841 useless extension candidates. Maximal degree in co-relation 2784. Up to 413 conditions per place. [2024-06-21 18:13:19,596 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 51 selfloop transitions, 20 changer transitions 0/81 dead transitions. [2024-06-21 18:13:19,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 81 transitions, 717 flow [2024-06-21 18:13:19,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:13:19,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:13:19,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-21 18:13:19,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6564102564102564 [2024-06-21 18:13:19,597 INFO L175 Difference]: Start difference. First operand has 89 places, 67 transitions, 543 flow. Second operand 5 states and 128 transitions. [2024-06-21 18:13:19,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 81 transitions, 717 flow [2024-06-21 18:13:19,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 81 transitions, 673 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:19,603 INFO L231 Difference]: Finished difference. Result has 91 places, 67 transitions, 545 flow [2024-06-21 18:13:19,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=545, PETRI_PLACES=91, PETRI_TRANSITIONS=67} [2024-06-21 18:13:19,604 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 51 predicate places. [2024-06-21 18:13:19,605 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 67 transitions, 545 flow [2024-06-21 18:13:19,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:19,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:19,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:19,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 18:13:19,608 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:19,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:19,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1206526112, now seen corresponding path program 2 times [2024-06-21 18:13:19,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:19,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924419718] [2024-06-21 18:13:19,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:19,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:19,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:19,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:19,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924419718] [2024-06-21 18:13:19,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924419718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:19,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:19,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:19,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141833806] [2024-06-21 18:13:19,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:19,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:19,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:19,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:19,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:19,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-21 18:13:19,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 67 transitions, 545 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:19,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:19,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-21 18:13:19,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:19,929 INFO L124 PetriNetUnfolderBase]: 506/1067 cut-off events. [2024-06-21 18:13:19,930 INFO L125 PetriNetUnfolderBase]: For 5392/5394 co-relation queries the response was YES. [2024-06-21 18:13:19,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3533 conditions, 1067 events. 506/1067 cut-off events. For 5392/5394 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6871 event pairs, 98 based on Foata normal form. 12/1056 useless extension candidates. Maximal degree in co-relation 3492. Up to 460 conditions per place. [2024-06-21 18:13:19,939 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 55 selfloop transitions, 25 changer transitions 3/93 dead transitions. [2024-06-21 18:13:19,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 93 transitions, 850 flow [2024-06-21 18:13:19,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:19,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:19,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 18:13:19,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6623931623931624 [2024-06-21 18:13:19,940 INFO L175 Difference]: Start difference. First operand has 91 places, 67 transitions, 545 flow. Second operand 6 states and 155 transitions. [2024-06-21 18:13:19,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 93 transitions, 850 flow [2024-06-21 18:13:19,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 93 transitions, 777 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:19,948 INFO L231 Difference]: Finished difference. Result has 92 places, 71 transitions, 613 flow [2024-06-21 18:13:19,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=613, PETRI_PLACES=92, PETRI_TRANSITIONS=71} [2024-06-21 18:13:19,949 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 52 predicate places. [2024-06-21 18:13:19,949 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 71 transitions, 613 flow [2024-06-21 18:13:19,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:19,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:19,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:19,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 18:13:19,950 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:19,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:19,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1021045272, now seen corresponding path program 3 times [2024-06-21 18:13:19,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:19,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260962249] [2024-06-21 18:13:19,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:19,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:19,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:20,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:20,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:20,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260962249] [2024-06-21 18:13:20,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260962249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:20,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:20,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:20,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150189377] [2024-06-21 18:13:20,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:20,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:20,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:20,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:20,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:20,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-21 18:13:20,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 71 transitions, 613 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:20,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:20,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-21 18:13:20,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:20,190 INFO L124 PetriNetUnfolderBase]: 454/969 cut-off events. [2024-06-21 18:13:20,191 INFO L125 PetriNetUnfolderBase]: For 4252/4254 co-relation queries the response was YES. [2024-06-21 18:13:20,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3258 conditions, 969 events. 454/969 cut-off events. For 4252/4254 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6200 event pairs, 45 based on Foata normal form. 12/964 useless extension candidates. Maximal degree in co-relation 3216. Up to 456 conditions per place. [2024-06-21 18:13:20,196 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 52 selfloop transitions, 23 changer transitions 7/92 dead transitions. [2024-06-21 18:13:20,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 92 transitions, 823 flow [2024-06-21 18:13:20,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:20,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:20,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 18:13:20,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-21 18:13:20,198 INFO L175 Difference]: Start difference. First operand has 92 places, 71 transitions, 613 flow. Second operand 7 states and 175 transitions. [2024-06-21 18:13:20,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 92 transitions, 823 flow [2024-06-21 18:13:20,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 92 transitions, 769 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:20,208 INFO L231 Difference]: Finished difference. Result has 94 places, 66 transitions, 577 flow [2024-06-21 18:13:20,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=577, PETRI_PLACES=94, PETRI_TRANSITIONS=66} [2024-06-21 18:13:20,209 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 54 predicate places. [2024-06-21 18:13:20,209 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 66 transitions, 577 flow [2024-06-21 18:13:20,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:20,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:20,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:20,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 18:13:20,209 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:20,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:20,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1775514396, now seen corresponding path program 4 times [2024-06-21 18:13:20,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:20,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420928223] [2024-06-21 18:13:20,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:20,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:20,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:20,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:20,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:20,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420928223] [2024-06-21 18:13:20,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420928223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:20,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:20,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:20,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395069051] [2024-06-21 18:13:20,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:20,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:20,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:20,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:20,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:20,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-21 18:13:20,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 66 transitions, 577 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:20,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:20,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-21 18:13:20,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:20,418 INFO L124 PetriNetUnfolderBase]: 424/901 cut-off events. [2024-06-21 18:13:20,419 INFO L125 PetriNetUnfolderBase]: For 3412/3415 co-relation queries the response was YES. [2024-06-21 18:13:20,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3142 conditions, 901 events. 424/901 cut-off events. For 3412/3415 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5597 event pairs, 104 based on Foata normal form. 7/877 useless extension candidates. Maximal degree in co-relation 3100. Up to 373 conditions per place. [2024-06-21 18:13:20,423 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 55 selfloop transitions, 27 changer transitions 0/92 dead transitions. [2024-06-21 18:13:20,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 92 transitions, 837 flow [2024-06-21 18:13:20,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:20,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:20,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 18:13:20,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6373626373626373 [2024-06-21 18:13:20,425 INFO L175 Difference]: Start difference. First operand has 94 places, 66 transitions, 577 flow. Second operand 7 states and 174 transitions. [2024-06-21 18:13:20,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 92 transitions, 837 flow [2024-06-21 18:13:20,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 92 transitions, 757 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 18:13:20,433 INFO L231 Difference]: Finished difference. Result has 92 places, 69 transitions, 589 flow [2024-06-21 18:13:20,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=589, PETRI_PLACES=92, PETRI_TRANSITIONS=69} [2024-06-21 18:13:20,434 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 52 predicate places. [2024-06-21 18:13:20,434 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 69 transitions, 589 flow [2024-06-21 18:13:20,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:20,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:20,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:20,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 18:13:20,435 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:20,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:20,435 INFO L85 PathProgramCache]: Analyzing trace with hash 389784604, now seen corresponding path program 5 times [2024-06-21 18:13:20,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:20,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643503392] [2024-06-21 18:13:20,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:20,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:20,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:20,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:20,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643503392] [2024-06-21 18:13:20,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643503392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:20,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:20,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:20,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23292048] [2024-06-21 18:13:20,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:20,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:20,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:20,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:20,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:20,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-21 18:13:20,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 69 transitions, 589 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:20,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:20,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-21 18:13:20,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:20,691 INFO L124 PetriNetUnfolderBase]: 416/883 cut-off events. [2024-06-21 18:13:20,692 INFO L125 PetriNetUnfolderBase]: For 3023/3025 co-relation queries the response was YES. [2024-06-21 18:13:20,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3072 conditions, 883 events. 416/883 cut-off events. For 3023/3025 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5428 event pairs, 57 based on Foata normal form. 4/860 useless extension candidates. Maximal degree in co-relation 3032. Up to 493 conditions per place. [2024-06-21 18:13:20,701 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 57 selfloop transitions, 21 changer transitions 0/88 dead transitions. [2024-06-21 18:13:20,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 88 transitions, 789 flow [2024-06-21 18:13:20,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:20,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:20,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 18:13:20,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6538461538461539 [2024-06-21 18:13:20,704 INFO L175 Difference]: Start difference. First operand has 92 places, 69 transitions, 589 flow. Second operand 6 states and 153 transitions. [2024-06-21 18:13:20,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 88 transitions, 789 flow [2024-06-21 18:13:20,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 88 transitions, 755 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 18:13:20,711 INFO L231 Difference]: Finished difference. Result has 95 places, 69 transitions, 601 flow [2024-06-21 18:13:20,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=601, PETRI_PLACES=95, PETRI_TRANSITIONS=69} [2024-06-21 18:13:20,711 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 55 predicate places. [2024-06-21 18:13:20,712 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 69 transitions, 601 flow [2024-06-21 18:13:20,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:20,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:20,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:20,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 18:13:20,712 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:20,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:20,713 INFO L85 PathProgramCache]: Analyzing trace with hash 589472344, now seen corresponding path program 6 times [2024-06-21 18:13:20,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:20,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114060292] [2024-06-21 18:13:20,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:20,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:20,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:20,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:20,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:20,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114060292] [2024-06-21 18:13:20,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114060292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:20,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:20,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:20,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253220450] [2024-06-21 18:13:20,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:20,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:20,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:20,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:20,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:20,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-21 18:13:20,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 69 transitions, 601 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:20,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:20,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-21 18:13:20,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:20,955 INFO L124 PetriNetUnfolderBase]: 476/1011 cut-off events. [2024-06-21 18:13:20,955 INFO L125 PetriNetUnfolderBase]: For 4568/4570 co-relation queries the response was YES. [2024-06-21 18:13:20,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3500 conditions, 1011 events. 476/1011 cut-off events. For 4568/4570 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 6502 event pairs, 62 based on Foata normal form. 4/983 useless extension candidates. Maximal degree in co-relation 3458. Up to 365 conditions per place. [2024-06-21 18:13:20,961 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 57 selfloop transitions, 30 changer transitions 0/97 dead transitions. [2024-06-21 18:13:20,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 97 transitions, 901 flow [2024-06-21 18:13:20,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:20,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:20,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 18:13:20,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6314102564102564 [2024-06-21 18:13:20,963 INFO L175 Difference]: Start difference. First operand has 95 places, 69 transitions, 601 flow. Second operand 8 states and 197 transitions. [2024-06-21 18:13:20,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 97 transitions, 901 flow [2024-06-21 18:13:20,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 97 transitions, 815 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 18:13:20,973 INFO L231 Difference]: Finished difference. Result has 97 places, 71 transitions, 597 flow [2024-06-21 18:13:20,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=597, PETRI_PLACES=97, PETRI_TRANSITIONS=71} [2024-06-21 18:13:20,974 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 57 predicate places. [2024-06-21 18:13:20,974 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 71 transitions, 597 flow [2024-06-21 18:13:20,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:20,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:20,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:20,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 18:13:20,976 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:20,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:20,976 INFO L85 PathProgramCache]: Analyzing trace with hash 390170554, now seen corresponding path program 7 times [2024-06-21 18:13:20,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:20,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416479585] [2024-06-21 18:13:20,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:20,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:20,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:21,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:21,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:21,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416479585] [2024-06-21 18:13:21,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416479585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:21,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:21,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:21,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162362168] [2024-06-21 18:13:21,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:21,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:21,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:21,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:21,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:21,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-21 18:13:21,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 71 transitions, 597 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:21,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:21,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-21 18:13:21,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:21,176 INFO L124 PetriNetUnfolderBase]: 468/979 cut-off events. [2024-06-21 18:13:21,176 INFO L125 PetriNetUnfolderBase]: For 4649/4651 co-relation queries the response was YES. [2024-06-21 18:13:21,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3293 conditions, 979 events. 468/979 cut-off events. For 4649/4651 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 6134 event pairs, 90 based on Foata normal form. 4/956 useless extension candidates. Maximal degree in co-relation 3252. Up to 361 conditions per place. [2024-06-21 18:13:21,182 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 53 selfloop transitions, 28 changer transitions 0/91 dead transitions. [2024-06-21 18:13:21,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 91 transitions, 831 flow [2024-06-21 18:13:21,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:13:21,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:13:21,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 18:13:21,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6495726495726496 [2024-06-21 18:13:21,185 INFO L175 Difference]: Start difference. First operand has 97 places, 71 transitions, 597 flow. Second operand 6 states and 152 transitions. [2024-06-21 18:13:21,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 91 transitions, 831 flow [2024-06-21 18:13:21,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 91 transitions, 774 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 18:13:21,193 INFO L231 Difference]: Finished difference. Result has 99 places, 71 transitions, 600 flow [2024-06-21 18:13:21,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=600, PETRI_PLACES=99, PETRI_TRANSITIONS=71} [2024-06-21 18:13:21,194 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 59 predicate places. [2024-06-21 18:13:21,194 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 71 transitions, 600 flow [2024-06-21 18:13:21,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:21,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:21,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:21,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 18:13:21,195 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)] === [2024-06-21 18:13:21,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:21,195 INFO L85 PathProgramCache]: Analyzing trace with hash 583758424, now seen corresponding path program 8 times [2024-06-21 18:13:21,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:21,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41438032] [2024-06-21 18:13:21,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:21,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:21,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:21,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:21,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:21,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41438032] [2024-06-21 18:13:21,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41438032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:21,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:21,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:13:21,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028344571] [2024-06-21 18:13:21,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:21,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:21,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:21,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:21,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:21,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-21 18:13:21,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 71 transitions, 600 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:21,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:21,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-21 18:13:21,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:21,407 INFO L124 PetriNetUnfolderBase]: 448/959 cut-off events. [2024-06-21 18:13:21,408 INFO L125 PetriNetUnfolderBase]: For 4415/4417 co-relation queries the response was YES. [2024-06-21 18:13:21,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3062 conditions, 959 events. 448/959 cut-off events. For 4415/4417 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 6134 event pairs, 52 based on Foata normal form. 12/951 useless extension candidates. Maximal degree in co-relation 3020. Up to 357 conditions per place. [2024-06-21 18:13:21,430 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 52 selfloop transitions, 31 changer transitions 4/97 dead transitions. [2024-06-21 18:13:21,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 97 transitions, 830 flow [2024-06-21 18:13:21,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:21,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:21,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-21 18:13:21,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6096866096866097 [2024-06-21 18:13:21,431 INFO L175 Difference]: Start difference. First operand has 99 places, 71 transitions, 600 flow. Second operand 9 states and 214 transitions. [2024-06-21 18:13:21,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 97 transitions, 830 flow [2024-06-21 18:13:21,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 97 transitions, 766 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 18:13:21,439 INFO L231 Difference]: Finished difference. Result has 103 places, 69 transitions, 587 flow [2024-06-21 18:13:21,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=587, PETRI_PLACES=103, PETRI_TRANSITIONS=69} [2024-06-21 18:13:21,440 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 63 predicate places. [2024-06-21 18:13:21,440 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 69 transitions, 587 flow [2024-06-21 18:13:21,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:21,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:21,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:21,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 18:13:21,441 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)] === [2024-06-21 18:13:21,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:21,441 INFO L85 PathProgramCache]: Analyzing trace with hash -857288744, now seen corresponding path program 1 times [2024-06-21 18:13:21,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:21,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720588139] [2024-06-21 18:13:21,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:21,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:21,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:21,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:21,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720588139] [2024-06-21 18:13:21,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720588139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:21,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:21,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:21,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379478198] [2024-06-21 18:13:21,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:21,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:21,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:21,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:21,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:21,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-21 18:13:21,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 69 transitions, 587 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:21,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:21,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-21 18:13:21,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:21,687 INFO L124 PetriNetUnfolderBase]: 452/967 cut-off events. [2024-06-21 18:13:21,687 INFO L125 PetriNetUnfolderBase]: For 4144/4146 co-relation queries the response was YES. [2024-06-21 18:13:21,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3095 conditions, 967 events. 452/967 cut-off events. For 4144/4146 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 6145 event pairs, 57 based on Foata normal form. 8/962 useless extension candidates. Maximal degree in co-relation 3052. Up to 424 conditions per place. [2024-06-21 18:13:21,695 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 50 selfloop transitions, 25 changer transitions 8/93 dead transitions. [2024-06-21 18:13:21,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 93 transitions, 823 flow [2024-06-21 18:13:21,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:21,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:21,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 18:13:21,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6373626373626373 [2024-06-21 18:13:21,696 INFO L175 Difference]: Start difference. First operand has 103 places, 69 transitions, 587 flow. Second operand 7 states and 174 transitions. [2024-06-21 18:13:21,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 93 transitions, 823 flow [2024-06-21 18:13:21,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 93 transitions, 700 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-06-21 18:13:21,709 INFO L231 Difference]: Finished difference. Result has 99 places, 68 transitions, 525 flow [2024-06-21 18:13:21,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=525, PETRI_PLACES=99, PETRI_TRANSITIONS=68} [2024-06-21 18:13:21,710 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 59 predicate places. [2024-06-21 18:13:21,710 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 68 transitions, 525 flow [2024-06-21 18:13:21,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:21,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:21,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:21,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 18:13:21,710 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:21,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:21,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1955468694, now seen corresponding path program 2 times [2024-06-21 18:13:21,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:21,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702694323] [2024-06-21 18:13:21,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:21,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:21,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:21,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:21,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702694323] [2024-06-21 18:13:21,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702694323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:21,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:21,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:21,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120238273] [2024-06-21 18:13:21,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:21,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:21,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:21,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:21,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:21,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-21 18:13:21,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 68 transitions, 525 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:21,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:21,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-21 18:13:21,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:21,944 INFO L124 PetriNetUnfolderBase]: 420/909 cut-off events. [2024-06-21 18:13:21,944 INFO L125 PetriNetUnfolderBase]: For 4840/4840 co-relation queries the response was YES. [2024-06-21 18:13:21,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2828 conditions, 909 events. 420/909 cut-off events. For 4840/4840 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5749 event pairs, 34 based on Foata normal form. 8/897 useless extension candidates. Maximal degree in co-relation 2786. Up to 169 conditions per place. [2024-06-21 18:13:21,948 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 43 selfloop transitions, 30 changer transitions 14/97 dead transitions. [2024-06-21 18:13:21,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 97 transitions, 795 flow [2024-06-21 18:13:21,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:13:21,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:13:21,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-21 18:13:21,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-21 18:13:21,950 INFO L175 Difference]: Start difference. First operand has 99 places, 68 transitions, 525 flow. Second operand 10 states and 230 transitions. [2024-06-21 18:13:21,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 97 transitions, 795 flow [2024-06-21 18:13:21,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 97 transitions, 704 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 18:13:21,959 INFO L231 Difference]: Finished difference. Result has 99 places, 64 transitions, 469 flow [2024-06-21 18:13:21,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=469, PETRI_PLACES=99, PETRI_TRANSITIONS=64} [2024-06-21 18:13:21,959 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 59 predicate places. [2024-06-21 18:13:21,959 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 64 transitions, 469 flow [2024-06-21 18:13:21,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:21,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:21,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:21,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 18:13:21,960 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:21,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:21,961 INFO L85 PathProgramCache]: Analyzing trace with hash 517503308, now seen corresponding path program 3 times [2024-06-21 18:13:21,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:21,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71853076] [2024-06-21 18:13:21,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:21,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:21,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:22,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:22,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71853076] [2024-06-21 18:13:22,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71853076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:22,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:22,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:22,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212442666] [2024-06-21 18:13:22,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:22,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:22,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:22,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:22,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:22,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-21 18:13:22,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 64 transitions, 469 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:22,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:22,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-21 18:13:22,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:22,230 INFO L124 PetriNetUnfolderBase]: 392/865 cut-off events. [2024-06-21 18:13:22,231 INFO L125 PetriNetUnfolderBase]: For 5667/5667 co-relation queries the response was YES. [2024-06-21 18:13:22,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2736 conditions, 865 events. 392/865 cut-off events. For 5667/5667 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 5580 event pairs, 60 based on Foata normal form. 8/847 useless extension candidates. Maximal degree in co-relation 2696. Up to 169 conditions per place. [2024-06-21 18:13:22,237 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 50 selfloop transitions, 25 changer transitions 10/95 dead transitions. [2024-06-21 18:13:22,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 95 transitions, 771 flow [2024-06-21 18:13:22,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:13:22,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:13:22,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 252 transitions. [2024-06-21 18:13:22,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5874125874125874 [2024-06-21 18:13:22,238 INFO L175 Difference]: Start difference. First operand has 99 places, 64 transitions, 469 flow. Second operand 11 states and 252 transitions. [2024-06-21 18:13:22,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 95 transitions, 771 flow [2024-06-21 18:13:22,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 95 transitions, 706 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 18:13:22,246 INFO L231 Difference]: Finished difference. Result has 98 places, 61 transitions, 443 flow [2024-06-21 18:13:22,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=443, PETRI_PLACES=98, PETRI_TRANSITIONS=61} [2024-06-21 18:13:22,247 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 58 predicate places. [2024-06-21 18:13:22,247 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 61 transitions, 443 flow [2024-06-21 18:13:22,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:22,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:22,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:22,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 18:13:22,248 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:22,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:22,248 INFO L85 PathProgramCache]: Analyzing trace with hash 517513538, now seen corresponding path program 4 times [2024-06-21 18:13:22,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:22,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117010668] [2024-06-21 18:13:22,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:22,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:22,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:22,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:22,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:22,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117010668] [2024-06-21 18:13:22,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117010668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:22,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:22,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:22,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276821691] [2024-06-21 18:13:22,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:22,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:22,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:22,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:22,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:22,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-21 18:13:22,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 61 transitions, 443 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:22,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:22,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-21 18:13:22,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:22,467 INFO L124 PetriNetUnfolderBase]: 344/769 cut-off events. [2024-06-21 18:13:22,468 INFO L125 PetriNetUnfolderBase]: For 4013/4013 co-relation queries the response was YES. [2024-06-21 18:13:22,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2387 conditions, 769 events. 344/769 cut-off events. For 4013/4013 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4830 event pairs, 42 based on Foata normal form. 8/753 useless extension candidates. Maximal degree in co-relation 2348. Up to 169 conditions per place. [2024-06-21 18:13:22,471 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 44 selfloop transitions, 18 changer transitions 12/84 dead transitions. [2024-06-21 18:13:22,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 84 transitions, 671 flow [2024-06-21 18:13:22,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:22,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:22,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-21 18:13:22,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-21 18:13:22,473 INFO L175 Difference]: Start difference. First operand has 98 places, 61 transitions, 443 flow. Second operand 9 states and 208 transitions. [2024-06-21 18:13:22,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 84 transitions, 671 flow [2024-06-21 18:13:22,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 84 transitions, 615 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 18:13:22,479 INFO L231 Difference]: Finished difference. Result has 95 places, 53 transitions, 356 flow [2024-06-21 18:13:22,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=356, PETRI_PLACES=95, PETRI_TRANSITIONS=53} [2024-06-21 18:13:22,480 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 55 predicate places. [2024-06-21 18:13:22,480 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 53 transitions, 356 flow [2024-06-21 18:13:22,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:22,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:22,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:22,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 18:13:22,481 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:22,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:22,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1587632774, now seen corresponding path program 5 times [2024-06-21 18:13:22,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:22,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65532187] [2024-06-21 18:13:22,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:22,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:22,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:22,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:22,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:22,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65532187] [2024-06-21 18:13:22,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65532187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:22,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:22,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:22,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245953723] [2024-06-21 18:13:22,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:22,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:22,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:22,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:22,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:22,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-21 18:13:22,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 53 transitions, 356 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:22,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:22,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-21 18:13:22,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:22,735 INFO L124 PetriNetUnfolderBase]: 332/753 cut-off events. [2024-06-21 18:13:22,736 INFO L125 PetriNetUnfolderBase]: For 4404/4404 co-relation queries the response was YES. [2024-06-21 18:13:22,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2298 conditions, 753 events. 332/753 cut-off events. For 4404/4404 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4822 event pairs, 103 based on Foata normal form. 8/734 useless extension candidates. Maximal degree in co-relation 2260. Up to 324 conditions per place. [2024-06-21 18:13:22,740 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 44 selfloop transitions, 14 changer transitions 10/78 dead transitions. [2024-06-21 18:13:22,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 78 transitions, 581 flow [2024-06-21 18:13:22,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:13:22,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:13:22,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 18:13:22,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-21 18:13:22,742 INFO L175 Difference]: Start difference. First operand has 95 places, 53 transitions, 356 flow. Second operand 8 states and 192 transitions. [2024-06-21 18:13:22,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 78 transitions, 581 flow [2024-06-21 18:13:22,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 78 transitions, 518 flow, removed 2 selfloop flow, removed 16 redundant places. [2024-06-21 18:13:22,749 INFO L231 Difference]: Finished difference. Result has 86 places, 51 transitions, 321 flow [2024-06-21 18:13:22,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=321, PETRI_PLACES=86, PETRI_TRANSITIONS=51} [2024-06-21 18:13:22,752 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 46 predicate places. [2024-06-21 18:13:22,752 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 51 transitions, 321 flow [2024-06-21 18:13:22,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:22,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:22,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:22,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 18:13:22,753 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)] === [2024-06-21 18:13:22,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:22,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1581193454, now seen corresponding path program 6 times [2024-06-21 18:13:22,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:22,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174881800] [2024-06-21 18:13:22,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:22,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:22,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:22,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:22,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:22,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174881800] [2024-06-21 18:13:22,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174881800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:22,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:22,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:22,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084861658] [2024-06-21 18:13:22,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:22,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:22,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:22,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:22,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:22,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-21 18:13:22,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 51 transitions, 321 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:22,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:22,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-21 18:13:22,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:22,992 INFO L124 PetriNetUnfolderBase]: 314/711 cut-off events. [2024-06-21 18:13:22,993 INFO L125 PetriNetUnfolderBase]: For 4244/4244 co-relation queries the response was YES. [2024-06-21 18:13:22,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2149 conditions, 711 events. 314/711 cut-off events. For 4244/4244 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4487 event pairs, 107 based on Foata normal form. 8/692 useless extension candidates. Maximal degree in co-relation 2114. Up to 324 conditions per place. [2024-06-21 18:13:22,996 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 41 selfloop transitions, 12 changer transitions 9/72 dead transitions. [2024-06-21 18:13:22,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 72 transitions, 521 flow [2024-06-21 18:13:22,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:22,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:22,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 18:13:22,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 18:13:22,997 INFO L175 Difference]: Start difference. First operand has 86 places, 51 transitions, 321 flow. Second operand 7 states and 169 transitions. [2024-06-21 18:13:22,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 72 transitions, 521 flow [2024-06-21 18:13:23,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 72 transitions, 489 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 18:13:23,001 INFO L231 Difference]: Finished difference. Result has 83 places, 49 transitions, 302 flow [2024-06-21 18:13:23,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=302, PETRI_PLACES=83, PETRI_TRANSITIONS=49} [2024-06-21 18:13:23,003 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 43 predicate places. [2024-06-21 18:13:23,003 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 49 transitions, 302 flow [2024-06-21 18:13:23,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:23,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:23,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:23,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 18:13:23,004 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)] === [2024-06-21 18:13:23,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:23,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1996788134, now seen corresponding path program 7 times [2024-06-21 18:13:23,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:23,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108480326] [2024-06-21 18:13:23,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:23,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:23,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:23,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:23,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:23,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108480326] [2024-06-21 18:13:23,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108480326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:23,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:23,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:23,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700026488] [2024-06-21 18:13:23,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:23,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:23,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:23,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:23,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:23,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-21 18:13:23,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 49 transitions, 302 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:23,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:23,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-21 18:13:23,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:23,234 INFO L124 PetriNetUnfolderBase]: 270/607 cut-off events. [2024-06-21 18:13:23,234 INFO L125 PetriNetUnfolderBase]: For 3307/3307 co-relation queries the response was YES. [2024-06-21 18:13:23,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1799 conditions, 607 events. 270/607 cut-off events. For 3307/3307 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3636 event pairs, 49 based on Foata normal form. 8/594 useless extension candidates. Maximal degree in co-relation 1765. Up to 324 conditions per place. [2024-06-21 18:13:23,239 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 36 selfloop transitions, 11 changer transitions 11/68 dead transitions. [2024-06-21 18:13:23,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 68 transitions, 460 flow [2024-06-21 18:13:23,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:23,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:23,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 18:13:23,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6117216117216118 [2024-06-21 18:13:23,241 INFO L175 Difference]: Start difference. First operand has 83 places, 49 transitions, 302 flow. Second operand 7 states and 167 transitions. [2024-06-21 18:13:23,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 68 transitions, 460 flow [2024-06-21 18:13:23,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 68 transitions, 419 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:23,245 INFO L231 Difference]: Finished difference. Result has 82 places, 45 transitions, 257 flow [2024-06-21 18:13:23,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=257, PETRI_PLACES=82, PETRI_TRANSITIONS=45} [2024-06-21 18:13:23,246 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 42 predicate places. [2024-06-21 18:13:23,246 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 45 transitions, 257 flow [2024-06-21 18:13:23,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:23,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:23,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:23,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 18:13:23,247 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)] === [2024-06-21 18:13:23,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:23,248 INFO L85 PathProgramCache]: Analyzing trace with hash 626713212, now seen corresponding path program 8 times [2024-06-21 18:13:23,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:23,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441898914] [2024-06-21 18:13:23,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:23,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:23,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:23,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:23,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441898914] [2024-06-21 18:13:23,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441898914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:23,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:23,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:23,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53325001] [2024-06-21 18:13:23,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:23,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:13:23,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:23,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:13:23,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:13:23,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-21 18:13:23,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 45 transitions, 257 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:23,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:23,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-21 18:13:23,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:23,426 INFO L124 PetriNetUnfolderBase]: 242/539 cut-off events. [2024-06-21 18:13:23,426 INFO L125 PetriNetUnfolderBase]: For 3113/3113 co-relation queries the response was YES. [2024-06-21 18:13:23,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1577 conditions, 539 events. 242/539 cut-off events. For 3113/3113 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3068 event pairs, 102 based on Foata normal form. 8/517 useless extension candidates. Maximal degree in co-relation 1544. Up to 319 conditions per place. [2024-06-21 18:13:23,429 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 29 selfloop transitions, 3 changer transitions 20/62 dead transitions. [2024-06-21 18:13:23,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 62 transitions, 397 flow [2024-06-21 18:13:23,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:23,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:23,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-21 18:13:23,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-21 18:13:23,430 INFO L175 Difference]: Start difference. First operand has 82 places, 45 transitions, 257 flow. Second operand 7 states and 161 transitions. [2024-06-21 18:13:23,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 62 transitions, 397 flow [2024-06-21 18:13:23,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 62 transitions, 342 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-06-21 18:13:23,434 INFO L231 Difference]: Finished difference. Result has 75 places, 40 transitions, 179 flow [2024-06-21 18:13:23,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=179, PETRI_PLACES=75, PETRI_TRANSITIONS=40} [2024-06-21 18:13:23,434 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 35 predicate places. [2024-06-21 18:13:23,434 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 40 transitions, 179 flow [2024-06-21 18:13:23,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:23,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:23,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:23,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 18:13:23,435 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:23,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:23,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1547200378, now seen corresponding path program 9 times [2024-06-21 18:13:23,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:23,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252703595] [2024-06-21 18:13:23,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:23,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:23,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:23,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:23,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252703595] [2024-06-21 18:13:23,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252703595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:23,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:23,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:23,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267565918] [2024-06-21 18:13:23,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:23,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:23,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:23,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:23,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:23,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-21 18:13:23,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 40 transitions, 179 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:23,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:23,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-21 18:13:23,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:23,651 INFO L124 PetriNetUnfolderBase]: 189/424 cut-off events. [2024-06-21 18:13:23,651 INFO L125 PetriNetUnfolderBase]: For 2856/2856 co-relation queries the response was YES. [2024-06-21 18:13:23,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1172 conditions, 424 events. 189/424 cut-off events. For 2856/2856 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2386 event pairs, 69 based on Foata normal form. 8/415 useless extension candidates. Maximal degree in co-relation 1143. Up to 179 conditions per place. [2024-06-21 18:13:23,653 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 34 selfloop transitions, 7 changer transitions 9/60 dead transitions. [2024-06-21 18:13:23,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 60 transitions, 349 flow [2024-06-21 18:13:23,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:23,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:23,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-21 18:13:23,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5669515669515669 [2024-06-21 18:13:23,655 INFO L175 Difference]: Start difference. First operand has 75 places, 40 transitions, 179 flow. Second operand 9 states and 199 transitions. [2024-06-21 18:13:23,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 60 transitions, 349 flow [2024-06-21 18:13:23,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 60 transitions, 324 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:23,657 INFO L231 Difference]: Finished difference. Result has 69 places, 38 transitions, 168 flow [2024-06-21 18:13:23,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=168, PETRI_PLACES=69, PETRI_TRANSITIONS=38} [2024-06-21 18:13:23,658 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 29 predicate places. [2024-06-21 18:13:23,658 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 38 transitions, 168 flow [2024-06-21 18:13:23,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:23,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:23,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:23,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 18:13:23,659 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:23,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:23,660 INFO L85 PathProgramCache]: Analyzing trace with hash -703197838, now seen corresponding path program 10 times [2024-06-21 18:13:23,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:23,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129630718] [2024-06-21 18:13:23,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:23,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:23,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:23,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:23,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:23,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129630718] [2024-06-21 18:13:23,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129630718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:23,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:23,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:23,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282525148] [2024-06-21 18:13:23,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:23,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:23,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:23,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:23,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:23,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-21 18:13:23,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 38 transitions, 168 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:23,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:23,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-21 18:13:23,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:23,841 INFO L124 PetriNetUnfolderBase]: 201/456 cut-off events. [2024-06-21 18:13:23,842 INFO L125 PetriNetUnfolderBase]: For 2419/2419 co-relation queries the response was YES. [2024-06-21 18:13:23,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1270 conditions, 456 events. 201/456 cut-off events. For 2419/2419 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2670 event pairs, 105 based on Foata normal form. 8/441 useless extension candidates. Maximal degree in co-relation 1245. Up to 172 conditions per place. [2024-06-21 18:13:23,844 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 29 selfloop transitions, 6 changer transitions 10/55 dead transitions. [2024-06-21 18:13:23,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 55 transitions, 316 flow [2024-06-21 18:13:23,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:13:23,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:13:23,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-21 18:13:23,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584045584045584 [2024-06-21 18:13:23,845 INFO L175 Difference]: Start difference. First operand has 69 places, 38 transitions, 168 flow. Second operand 9 states and 196 transitions. [2024-06-21 18:13:23,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 55 transitions, 316 flow [2024-06-21 18:13:23,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 55 transitions, 295 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:23,848 INFO L231 Difference]: Finished difference. Result has 68 places, 35 transitions, 150 flow [2024-06-21 18:13:23,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=150, PETRI_PLACES=68, PETRI_TRANSITIONS=35} [2024-06-21 18:13:23,848 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 28 predicate places. [2024-06-21 18:13:23,848 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 35 transitions, 150 flow [2024-06-21 18:13:23,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:23,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:23,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:23,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 18:13:23,849 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:23,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:23,849 INFO L85 PathProgramCache]: Analyzing trace with hash 916642374, now seen corresponding path program 11 times [2024-06-21 18:13:23,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:23,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437503396] [2024-06-21 18:13:23,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:23,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:23,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:23,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:23,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437503396] [2024-06-21 18:13:23,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437503396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:23,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:23,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:23,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841152671] [2024-06-21 18:13:23,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:23,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:23,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:23,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:23,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:23,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-21 18:13:23,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 35 transitions, 150 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:23,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:23,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-21 18:13:23,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:24,008 INFO L124 PetriNetUnfolderBase]: 145/340 cut-off events. [2024-06-21 18:13:24,008 INFO L125 PetriNetUnfolderBase]: For 1562/1562 co-relation queries the response was YES. [2024-06-21 18:13:24,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 917 conditions, 340 events. 145/340 cut-off events. For 1562/1562 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 1845 event pairs, 51 based on Foata normal form. 8/336 useless extension candidates. Maximal degree in co-relation 893. Up to 92 conditions per place. [2024-06-21 18:13:24,009 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 24 selfloop transitions, 5 changer transitions 15/54 dead transitions. [2024-06-21 18:13:24,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 54 transitions, 298 flow [2024-06-21 18:13:24,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:13:24,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:13:24,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-21 18:13:24,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487179487179488 [2024-06-21 18:13:24,011 INFO L175 Difference]: Start difference. First operand has 68 places, 35 transitions, 150 flow. Second operand 10 states and 214 transitions. [2024-06-21 18:13:24,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 54 transitions, 298 flow [2024-06-21 18:13:24,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 54 transitions, 277 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:24,013 INFO L231 Difference]: Finished difference. Result has 67 places, 31 transitions, 125 flow [2024-06-21 18:13:24,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=125, PETRI_PLACES=67, PETRI_TRANSITIONS=31} [2024-06-21 18:13:24,013 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 27 predicate places. [2024-06-21 18:13:24,013 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 31 transitions, 125 flow [2024-06-21 18:13:24,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:24,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:24,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:24,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 18:13:24,014 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:24,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:24,015 INFO L85 PathProgramCache]: Analyzing trace with hash -881396068, now seen corresponding path program 12 times [2024-06-21 18:13:24,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:24,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141316414] [2024-06-21 18:13:24,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:24,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:24,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:24,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:24,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:24,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141316414] [2024-06-21 18:13:24,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141316414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:24,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:24,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:24,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451531115] [2024-06-21 18:13:24,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:24,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:24,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:24,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:24,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:24,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-21 18:13:24,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 31 transitions, 125 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:24,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:24,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-21 18:13:24,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:24,220 INFO L124 PetriNetUnfolderBase]: 95/230 cut-off events. [2024-06-21 18:13:24,221 INFO L125 PetriNetUnfolderBase]: For 730/730 co-relation queries the response was YES. [2024-06-21 18:13:24,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 593 conditions, 230 events. 95/230 cut-off events. For 730/730 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1093 event pairs, 39 based on Foata normal form. 8/231 useless extension candidates. Maximal degree in co-relation 571. Up to 97 conditions per place. [2024-06-21 18:13:24,222 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 18 selfloop transitions, 3 changer transitions 12/43 dead transitions. [2024-06-21 18:13:24,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 43 transitions, 215 flow [2024-06-21 18:13:24,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:24,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:24,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-21 18:13:24,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5604395604395604 [2024-06-21 18:13:24,223 INFO L175 Difference]: Start difference. First operand has 67 places, 31 transitions, 125 flow. Second operand 7 states and 153 transitions. [2024-06-21 18:13:24,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 43 transitions, 215 flow [2024-06-21 18:13:24,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 43 transitions, 193 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 18:13:24,224 INFO L231 Difference]: Finished difference. Result has 56 places, 28 transitions, 97 flow [2024-06-21 18:13:24,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=97, PETRI_PLACES=56, PETRI_TRANSITIONS=28} [2024-06-21 18:13:24,224 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 16 predicate places. [2024-06-21 18:13:24,224 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 28 transitions, 97 flow [2024-06-21 18:13:24,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:24,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:13:24,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:13:24,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 18:13:24,225 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:13:24,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:13:24,226 INFO L85 PathProgramCache]: Analyzing trace with hash -789614300, now seen corresponding path program 13 times [2024-06-21 18:13:24,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:13:24,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194643936] [2024-06-21 18:13:24,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:13:24,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:13:24,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:13:24,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:13:24,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:13:24,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194643936] [2024-06-21 18:13:24,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194643936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:13:24,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:13:24,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:13:24,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399052809] [2024-06-21 18:13:24,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:13:24,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:13:24,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:13:24,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:13:24,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:13:24,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-21 18:13:24,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 28 transitions, 97 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:24,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:13:24,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-21 18:13:24,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:13:24,374 INFO L124 PetriNetUnfolderBase]: 47/122 cut-off events. [2024-06-21 18:13:24,374 INFO L125 PetriNetUnfolderBase]: For 179/179 co-relation queries the response was YES. [2024-06-21 18:13:24,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 122 events. 47/122 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 397 event pairs, 3 based on Foata normal form. 8/129 useless extension candidates. Maximal degree in co-relation 273. Up to 40 conditions per place. [2024-06-21 18:13:24,374 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 0 selfloop transitions, 0 changer transitions 36/36 dead transitions. [2024-06-21 18:13:24,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 36 transitions, 153 flow [2024-06-21 18:13:24,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:13:24,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:13:24,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-21 18:13:24,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5347985347985348 [2024-06-21 18:13:24,375 INFO L175 Difference]: Start difference. First operand has 56 places, 28 transitions, 97 flow. Second operand 7 states and 146 transitions. [2024-06-21 18:13:24,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 36 transitions, 153 flow [2024-06-21 18:13:24,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 36 transitions, 139 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 18:13:24,377 INFO L231 Difference]: Finished difference. Result has 47 places, 0 transitions, 0 flow [2024-06-21 18:13:24,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=47, PETRI_TRANSITIONS=0} [2024-06-21 18:13:24,377 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 7 predicate places. [2024-06-21 18:13:24,377 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 0 transitions, 0 flow [2024-06-21 18:13:24,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:13:24,380 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 6 remaining) [2024-06-21 18:13:24,380 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 6 remaining) [2024-06-21 18:13:24,382 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 6 remaining) [2024-06-21 18:13:24,383 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-06-21 18:13:24,383 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2024-06-21 18:13:24,383 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2024-06-21 18:13:24,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 18:13:24,383 INFO L445 BasicCegarLoop]: Path program histogram: [13, 8, 4, 3, 2, 2, 1, 1, 1, 1] [2024-06-21 18:13:24,388 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 18:13:24,388 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 18:13:24,391 INFO L507 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-06-21 18:13:24,391 INFO L508 ceAbstractionStarter]: WitnessConsidered=3 [2024-06-21 18:13:24,392 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 06:13:24 BasicIcfg [2024-06-21 18:13:24,392 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 18:13:24,393 INFO L158 Benchmark]: Toolchain (without parser) took 9709.27ms. Allocated memory was 178.3MB in the beginning and 442.5MB in the end (delta: 264.2MB). Free memory was 105.8MB in the beginning and 158.2MB in the end (delta: -52.4MB). Peak memory consumption was 213.8MB. Max. memory is 16.1GB. [2024-06-21 18:13:24,393 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 178.3MB. Free memory is still 136.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 18:13:24,393 INFO L158 Benchmark]: Witness Parser took 0.16ms. Allocated memory is still 178.3MB. Free memory is still 108.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 18:13:24,393 INFO L158 Benchmark]: CACSL2BoogieTranslator took 424.95ms. Allocated memory is still 178.3MB. Free memory was 105.4MB in the beginning and 130.2MB in the end (delta: -24.8MB). Peak memory consumption was 9.1MB. Max. memory is 16.1GB. [2024-06-21 18:13:24,394 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.47ms. Allocated memory is still 178.3MB. Free memory was 130.2MB in the beginning and 128.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 18:13:24,394 INFO L158 Benchmark]: Boogie Preprocessor took 35.70ms. Allocated memory is still 178.3MB. Free memory was 128.1MB in the beginning and 126.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 18:13:24,394 INFO L158 Benchmark]: RCFGBuilder took 348.91ms. Allocated memory is still 178.3MB. Free memory was 126.0MB in the beginning and 105.1MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-06-21 18:13:24,394 INFO L158 Benchmark]: TraceAbstraction took 8865.51ms. Allocated memory was 178.3MB in the beginning and 442.5MB in the end (delta: 264.2MB). Free memory was 104.2MB in the beginning and 158.2MB in the end (delta: -54.1MB). Peak memory consumption was 213.0MB. Max. memory is 16.1GB. [2024-06-21 18:13:24,395 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 178.3MB. Free memory is still 136.2MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.16ms. Allocated memory is still 178.3MB. Free memory is still 108.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 424.95ms. Allocated memory is still 178.3MB. Free memory was 105.4MB in the beginning and 130.2MB in the end (delta: -24.8MB). Peak memory consumption was 9.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.47ms. Allocated memory is still 178.3MB. Free memory was 130.2MB in the beginning and 128.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.70ms. Allocated memory is still 178.3MB. Free memory was 128.1MB in the beginning and 126.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 348.91ms. Allocated memory is still 178.3MB. Free memory was 126.0MB in the beginning and 105.1MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 8865.51ms. Allocated memory was 178.3MB in the beginning and 442.5MB in the end (delta: 264.2MB). Free memory was 104.2MB in the beginning and 158.2MB in the end (delta: -54.1MB). Peak memory consumption was 213.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 778]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 780]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 781]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 63 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 8.8s, OverallIterations: 36, TraceHistogramMax: 1, PathProgramHistogramMax: 13, EmptinessCheckTime: 0.0s, AutomataDifference: 5.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2076 SdHoareTripleChecker+Valid, 2.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1740 mSDsluCounter, 362 SdHoareTripleChecker+Invalid, 1.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 202 mSDsCounter, 227 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5062 IncrementalHoareTripleChecker+Invalid, 5289 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 227 mSolverCounterUnsat, 160 mSDtfsCounter, 5062 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 227 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=613occurred in iteration=17, InterpolantAutomatonStates: 239, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 613 NumberOfCodeBlocks, 613 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 577 ConstructedInterpolants, 0 QuantifiedInterpolants, 4760 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 36 InterpolantComputations, 36 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-21 18:13:24,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE