./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi009_power.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/rfi009_power.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/rfi009_power.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/rfi009_power.oepc.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 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 22:32:43,152 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 22:32:43,207 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 22:32:43,214 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 22:32:43,215 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 22:32:43,231 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 22:32:43,232 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 22:32:43,232 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 22:32:43,233 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 22:32:43,233 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 22:32:43,233 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 22:32:43,233 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 22:32:43,234 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 22:32:43,234 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 22:32:43,234 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 22:32:43,235 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 22:32:43,235 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 22:32:43,235 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 22:32:43,235 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 22:32:43,236 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 22:32:43,236 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 22:32:43,238 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 22:32:43,238 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 22:32:43,238 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 22:32:43,238 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 22:32:43,238 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 22:32:43,239 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 22:32:43,239 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 22:32:43,239 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 22:32:43,239 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 22:32:43,239 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 22:32:43,240 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 22:32:43,240 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 22:32:43,240 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 22:32:43,240 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 22:32:43,240 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 22:32:43,241 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 22:32:43,241 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 22:32:43,241 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 22:32:43,241 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 22:32:43,241 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 22:32:43,242 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 22:32:43,242 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 22:32:43,242 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 22:32:43,423 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 22:32:43,448 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 22:32:43,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 22:32:43,451 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 22:32:43,452 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 22:32:43,453 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi009_power.oepc.i [2024-06-27 22:32:44,503 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 22:32:44,761 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 22:32:44,762 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi009_power.oepc.i [2024-06-27 22:32:44,779 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c5e80635/4a1c6dee7efd4552bbb734a7d14ef6a8/FLAG37d56c5ab [2024-06-27 22:32:44,799 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c5e80635/4a1c6dee7efd4552bbb734a7d14ef6a8 [2024-06-27 22:32:44,801 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 22:32:44,801 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 22:32:44,802 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/rfi009_power.oepc.yml/witness.yml [2024-06-27 22:32:44,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 22:32:44,878 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 22:32:44,879 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 22:32:44,879 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 22:32:44,883 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 22:32:44,883 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 10:32:44" (1/2) ... [2024-06-27 22:32:44,884 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fd73482 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 10:32:44, skipping insertion in model container [2024-06-27 22:32:44,885 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 10:32:44" (1/2) ... [2024-06-27 22:32:44,886 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6084cd89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 10:32:44, skipping insertion in model container [2024-06-27 22:32:44,886 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 10:32:44" (2/2) ... [2024-06-27 22:32:44,887 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fd73482 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:32:44, skipping insertion in model container [2024-06-27 22:32:44,887 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 10:32:44" (2/2) ... [2024-06-27 22:32:44,888 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 22:32:44,913 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 22:32:44,914 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ! multithreaded || (((((0LL - (long long )__unbuffered_p0_EBX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )x$mem_tmp >= 0LL) && (long long )x - (long long )x$mem_tmp >= 0LL) [2024-06-27 22:32:44,914 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] ! multithreaded || (((((0LL - (long long )__unbuffered_p0_EBX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )x$mem_tmp >= 0LL) && (long long )x - (long long )x$mem_tmp >= 0LL) [2024-06-27 22:32:44,915 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] ! multithreaded || (((((0LL - (long long )__unbuffered_p0_EBX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )x$mem_tmp >= 0LL) && (long long )x - (long long )x$mem_tmp >= 0LL) [2024-06-27 22:32:44,915 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 22:32:44,915 INFO L106 edCorrectnessWitness]: ghost_update [L851-L851] multithreaded = 1; [2024-06-27 22:32:44,954 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 22:32:45,096 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi009_power.oepc.i[994,1007] [2024-06-27 22:32:45,290 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 22:32:45,302 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 22:32:45,339 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi009_power.oepc.i[994,1007] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 22:32:45,427 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 22:32:45,460 INFO L206 MainTranslator]: Completed translation [2024-06-27 22:32:45,460 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:32:45 WrapperNode [2024-06-27 22:32:45,460 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 22:32:45,461 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 22:32:45,461 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 22:32:45,461 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 22:32:45,467 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:32:45" (1/1) ... [2024-06-27 22:32:45,502 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:32:45" (1/1) ... [2024-06-27 22:32:45,533 INFO L138 Inliner]: procedures = 175, calls = 69, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 153 [2024-06-27 22:32:45,533 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 22:32:45,534 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 22:32:45,535 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 22:32:45,535 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 22:32:45,543 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:32:45" (1/1) ... [2024-06-27 22:32:45,544 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:32:45" (1/1) ... [2024-06-27 22:32:45,556 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:32:45" (1/1) ... [2024-06-27 22:32:45,586 INFO L175 MemorySlicer]: Split 29 memory accesses to 2 slices as follows [2, 27]. 93 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 7 writes are split as follows [0, 7]. [2024-06-27 22:32:45,587 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:32:45" (1/1) ... [2024-06-27 22:32:45,588 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:32:45" (1/1) ... [2024-06-27 22:32:45,597 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:32:45" (1/1) ... [2024-06-27 22:32:45,606 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:32:45" (1/1) ... [2024-06-27 22:32:45,609 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:32:45" (1/1) ... [2024-06-27 22:32:45,616 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:32:45" (1/1) ... [2024-06-27 22:32:45,619 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 22:32:45,621 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 22:32:45,622 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 22:32:45,622 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 22:32:45,623 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:32:45" (1/1) ... [2024-06-27 22:32:45,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 22:32:45,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 22:32:45,647 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 22:32:45,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 22:32:45,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 22:32:45,684 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 22:32:45,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 22:32:45,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 22:32:45,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 22:32:45,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 22:32:45,684 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 22:32:45,685 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 22:32:45,685 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 22:32:45,685 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 22:32:45,686 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 22:32:45,686 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 22:32:45,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 22:32:45,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 22:32:45,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 22:32:45,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 22:32:45,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 22:32:45,690 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 22:32:45,820 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 22:32:45,822 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 22:32:46,258 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 22:32:46,259 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 22:32:46,471 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 22:32:46,471 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 22:32:46,472 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 10:32:46 BoogieIcfgContainer [2024-06-27 22:32:46,472 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 22:32:46,473 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 22:32:46,473 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 22:32:46,475 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 22:32:46,476 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 10:32:44" (1/4) ... [2024-06-27 22:32:46,476 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b1894d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 10:32:46, skipping insertion in model container [2024-06-27 22:32:46,476 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 10:32:44" (2/4) ... [2024-06-27 22:32:46,477 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b1894d9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 10:32:46, skipping insertion in model container [2024-06-27 22:32:46,477 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:32:45" (3/4) ... [2024-06-27 22:32:46,477 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b1894d9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 10:32:46, skipping insertion in model container [2024-06-27 22:32:46,477 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 10:32:46" (4/4) ... [2024-06-27 22:32:46,479 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi009_power.oepc.i [2024-06-27 22:32:46,496 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 22:32:46,496 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 22:32:46,496 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 22:32:46,546 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 22:32:46,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 47 transitions, 106 flow [2024-06-27 22:32:46,604 INFO L124 PetriNetUnfolderBase]: 1/44 cut-off events. [2024-06-27 22:32:46,605 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 22:32:46,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 44 events. 1/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2024-06-27 22:32:46,608 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 47 transitions, 106 flow [2024-06-27 22:32:46,612 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 41 transitions, 91 flow [2024-06-27 22:32:46,619 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 22:32:46,623 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;@417bdf90, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 22:32:46,624 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 22:32:46,627 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 22:32:46,627 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 22:32:46,628 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 22:32:46,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:32:46,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 22:32:46,629 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:32:46,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:32:46,634 INFO L85 PathProgramCache]: Analyzing trace with hash 687100384, now seen corresponding path program 1 times [2024-06-27 22:32:46,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:32:46,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487995053] [2024-06-27 22:32:46,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:32:46,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:32:46,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:32:47,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:32:47,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:32:47,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487995053] [2024-06-27 22:32:47,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487995053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:32:47,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:32:47,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 22:32:47,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381830331] [2024-06-27 22:32:47,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:32:47,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 22:32:47,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:32:47,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 22:32:47,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 22:32:47,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-06-27 22:32:47,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:32:47,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:32:47,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-06-27 22:32:47,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:32:47,506 INFO L124 PetriNetUnfolderBase]: 978/1763 cut-off events. [2024-06-27 22:32:47,506 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-06-27 22:32:47,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3283 conditions, 1763 events. 978/1763 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 10959 event pairs, 552 based on Foata normal form. 0/1661 useless extension candidates. Maximal degree in co-relation 3271. Up to 1470 conditions per place. [2024-06-27 22:32:47,517 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 39 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-27 22:32:47,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 217 flow [2024-06-27 22:32:47,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 22:32:47,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 22:32:47,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-06-27 22:32:47,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6950354609929078 [2024-06-27 22:32:47,527 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 91 flow. Second operand 3 states and 98 transitions. [2024-06-27 22:32:47,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 217 flow [2024-06-27 22:32:47,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 57 transitions, 212 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 22:32:47,532 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 125 flow [2024-06-27 22:32:47,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-27 22:32:47,535 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2024-06-27 22:32:47,536 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 125 flow [2024-06-27 22:32:47,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:32:47,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:32:47,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:32:47,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 22:32:47,537 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:32:47,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:32:47,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1121441441, now seen corresponding path program 1 times [2024-06-27 22:32:47,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:32:47,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595683618] [2024-06-27 22:32:47,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:32:47,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:32:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:32:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:32:47,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:32:47,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595683618] [2024-06-27 22:32:47,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595683618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:32:47,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:32:47,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 22:32:47,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67328428] [2024-06-27 22:32:47,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:32:47,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 22:32:47,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:32:47,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 22:32:47,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 22:32:47,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-06-27 22:32:47,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 125 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:32:47,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:32:47,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-06-27 22:32:47,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:32:48,252 INFO L124 PetriNetUnfolderBase]: 969/1718 cut-off events. [2024-06-27 22:32:48,253 INFO L125 PetriNetUnfolderBase]: For 323/323 co-relation queries the response was YES. [2024-06-27 22:32:48,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3741 conditions, 1718 events. 969/1718 cut-off events. For 323/323 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 10742 event pairs, 348 based on Foata normal form. 6/1696 useless extension candidates. Maximal degree in co-relation 3729. Up to 1405 conditions per place. [2024-06-27 22:32:48,263 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 36 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-06-27 22:32:48,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 56 transitions, 239 flow [2024-06-27 22:32:48,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 22:32:48,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 22:32:48,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2024-06-27 22:32:48,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 22:32:48,267 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 125 flow. Second operand 3 states and 94 transitions. [2024-06-27 22:32:48,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 56 transitions, 239 flow [2024-06-27 22:32:48,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 56 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 22:32:48,270 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 159 flow [2024-06-27 22:32:48,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=159, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2024-06-27 22:32:48,273 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2024-06-27 22:32:48,273 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 159 flow [2024-06-27 22:32:48,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:32:48,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:32:48,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:32:48,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 22:32:48,279 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:32:48,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:32:48,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1754077217, now seen corresponding path program 1 times [2024-06-27 22:32:48,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:32:48,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688152268] [2024-06-27 22:32:48,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:32:48,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:32:48,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:32:48,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:32:48,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:32:48,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688152268] [2024-06-27 22:32:48,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688152268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:32:48,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:32:48,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 22:32:48,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496263128] [2024-06-27 22:32:48,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:32:48,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 22:32:48,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:32:48,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 22:32:48,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 22:32:48,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:32:48,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 159 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:32:48,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:32:48,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:32:48,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:32:48,788 INFO L124 PetriNetUnfolderBase]: 1721/2910 cut-off events. [2024-06-27 22:32:48,788 INFO L125 PetriNetUnfolderBase]: For 1142/1142 co-relation queries the response was YES. [2024-06-27 22:32:48,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6782 conditions, 2910 events. 1721/2910 cut-off events. For 1142/1142 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17683 event pairs, 960 based on Foata normal form. 2/2877 useless extension candidates. Maximal degree in co-relation 6768. Up to 2518 conditions per place. [2024-06-27 22:32:48,803 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 51 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-27 22:32:48,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 71 transitions, 343 flow [2024-06-27 22:32:48,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 22:32:48,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 22:32:48,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2024-06-27 22:32:48,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6329787234042553 [2024-06-27 22:32:48,808 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 159 flow. Second operand 4 states and 119 transitions. [2024-06-27 22:32:48,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 71 transitions, 343 flow [2024-06-27 22:32:48,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 71 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 22:32:48,810 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 205 flow [2024-06-27 22:32:48,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-27 22:32:48,812 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2024-06-27 22:32:48,812 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 205 flow [2024-06-27 22:32:48,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:32:48,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:32:48,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:32:48,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 22:32:48,813 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:32:48,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:32:48,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1469801308, now seen corresponding path program 1 times [2024-06-27 22:32:48,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:32:48,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709598143] [2024-06-27 22:32:48,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:32:48,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:32:48,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:32:48,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:32:48,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:32:48,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709598143] [2024-06-27 22:32:48,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709598143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:32:48,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:32:48,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 22:32:48,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601553998] [2024-06-27 22:32:48,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:32:48,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 22:32:48,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:32:48,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 22:32:48,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 22:32:48,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:32:48,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 205 flow. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:32:48,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:32:48,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:32:48,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:32:49,381 INFO L124 PetriNetUnfolderBase]: 1716/2923 cut-off events. [2024-06-27 22:32:49,382 INFO L125 PetriNetUnfolderBase]: For 2148/2148 co-relation queries the response was YES. [2024-06-27 22:32:49,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7444 conditions, 2923 events. 1716/2923 cut-off events. For 2148/2148 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 17945 event pairs, 924 based on Foata normal form. 2/2907 useless extension candidates. Maximal degree in co-relation 7428. Up to 2494 conditions per place. [2024-06-27 22:32:49,397 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 59 selfloop transitions, 13 changer transitions 0/83 dead transitions. [2024-06-27 22:32:49,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 83 transitions, 437 flow [2024-06-27 22:32:49,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:32:49,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:32:49,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-27 22:32:49,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6212765957446809 [2024-06-27 22:32:49,399 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 205 flow. Second operand 5 states and 146 transitions. [2024-06-27 22:32:49,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 83 transitions, 437 flow [2024-06-27 22:32:49,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 83 transitions, 414 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-27 22:32:49,402 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 249 flow [2024-06-27 22:32:49,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2024-06-27 22:32:49,403 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2024-06-27 22:32:49,403 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 249 flow [2024-06-27 22:32:49,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:32:49,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:32:49,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:32:49,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 22:32:49,404 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:32:49,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:32:49,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1587173232, now seen corresponding path program 1 times [2024-06-27 22:32:49,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:32:49,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75712461] [2024-06-27 22:32:49,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:32:49,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:32:49,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:32:49,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:32:49,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:32:49,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75712461] [2024-06-27 22:32:49,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75712461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:32:49,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:32:49,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 22:32:49,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413471025] [2024-06-27 22:32:49,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:32:49,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 22:32:49,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:32:49,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 22:32:49,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 22:32:49,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:32:49,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 249 flow. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:32:49,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:32:49,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:32:49,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:32:50,351 INFO L124 PetriNetUnfolderBase]: 1711/2913 cut-off events. [2024-06-27 22:32:50,351 INFO L125 PetriNetUnfolderBase]: For 3375/3375 co-relation queries the response was YES. [2024-06-27 22:32:50,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8081 conditions, 2913 events. 1711/2913 cut-off events. For 3375/3375 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17882 event pairs, 703 based on Foata normal form. 2/2893 useless extension candidates. Maximal degree in co-relation 8064. Up to 2429 conditions per place. [2024-06-27 22:32:50,368 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 67 selfloop transitions, 13 changer transitions 0/91 dead transitions. [2024-06-27 22:32:50,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 91 transitions, 541 flow [2024-06-27 22:32:50,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 22:32:50,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 22:32:50,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-06-27 22:32:50,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6648936170212766 [2024-06-27 22:32:50,374 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 249 flow. Second operand 4 states and 125 transitions. [2024-06-27 22:32:50,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 91 transitions, 541 flow [2024-06-27 22:32:50,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 91 transitions, 504 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 22:32:50,378 INFO L231 Difference]: Finished difference. Result has 60 places, 63 transitions, 316 flow [2024-06-27 22:32:50,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=316, PETRI_PLACES=60, PETRI_TRANSITIONS=63} [2024-06-27 22:32:50,380 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 9 predicate places. [2024-06-27 22:32:50,380 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 63 transitions, 316 flow [2024-06-27 22:32:50,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:32:50,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:32:50,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:32:50,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 22:32:50,381 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:32:50,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:32:50,381 INFO L85 PathProgramCache]: Analyzing trace with hash -2040971170, now seen corresponding path program 1 times [2024-06-27 22:32:50,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:32:50,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848048829] [2024-06-27 22:32:50,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:32:50,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:32:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:32:50,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:32:50,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:32:50,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848048829] [2024-06-27 22:32:50,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848048829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:32:50,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:32:50,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:32:50,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582108062] [2024-06-27 22:32:50,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:32:50,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:32:50,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:32:50,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:32:50,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:32:50,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:32:50,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 63 transitions, 316 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:32:50,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:32:50,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:32:50,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:32:51,191 INFO L124 PetriNetUnfolderBase]: 1699/2899 cut-off events. [2024-06-27 22:32:51,192 INFO L125 PetriNetUnfolderBase]: For 4945/4950 co-relation queries the response was YES. [2024-06-27 22:32:51,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8771 conditions, 2899 events. 1699/2899 cut-off events. For 4945/4950 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17770 event pairs, 590 based on Foata normal form. 12/2891 useless extension candidates. Maximal degree in co-relation 8752. Up to 2302 conditions per place. [2024-06-27 22:32:51,211 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 80 selfloop transitions, 25 changer transitions 0/116 dead transitions. [2024-06-27 22:32:51,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 116 transitions, 744 flow [2024-06-27 22:32:51,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:32:51,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:32:51,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 22:32:51,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6347517730496454 [2024-06-27 22:32:51,213 INFO L175 Difference]: Start difference. First operand has 60 places, 63 transitions, 316 flow. Second operand 6 states and 179 transitions. [2024-06-27 22:32:51,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 116 transitions, 744 flow [2024-06-27 22:32:51,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 116 transitions, 744 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 22:32:51,219 INFO L231 Difference]: Finished difference. Result has 69 places, 76 transitions, 521 flow [2024-06-27 22:32:51,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=521, PETRI_PLACES=69, PETRI_TRANSITIONS=76} [2024-06-27 22:32:51,221 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 18 predicate places. [2024-06-27 22:32:51,222 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 76 transitions, 521 flow [2024-06-27 22:32:51,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:32:51,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:32:51,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:32:51,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 22:32:51,222 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:32:51,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:32:51,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1099073413, now seen corresponding path program 1 times [2024-06-27 22:32:51,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:32:51,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430553715] [2024-06-27 22:32:51,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:32:51,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:32:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:32:51,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:32:51,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:32:51,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430553715] [2024-06-27 22:32:51,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430553715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:32:51,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:32:51,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:32:51,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908330281] [2024-06-27 22:32:51,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:32:51,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:32:51,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:32:51,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:32:51,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:32:51,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-06-27 22:32:51,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 76 transitions, 521 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:32:51,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:32:51,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-06-27 22:32:51,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:32:52,122 INFO L124 PetriNetUnfolderBase]: 2253/3808 cut-off events. [2024-06-27 22:32:52,122 INFO L125 PetriNetUnfolderBase]: For 8915/8919 co-relation queries the response was YES. [2024-06-27 22:32:52,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12730 conditions, 3808 events. 2253/3808 cut-off events. For 8915/8919 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 24120 event pairs, 516 based on Foata normal form. 12/3803 useless extension candidates. Maximal degree in co-relation 12704. Up to 2595 conditions per place. [2024-06-27 22:32:52,149 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 127 selfloop transitions, 36 changer transitions 0/173 dead transitions. [2024-06-27 22:32:52,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 173 transitions, 1282 flow [2024-06-27 22:32:52,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 22:32:52,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 22:32:52,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-06-27 22:32:52,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 22:32:52,151 INFO L175 Difference]: Start difference. First operand has 69 places, 76 transitions, 521 flow. Second operand 8 states and 235 transitions. [2024-06-27 22:32:52,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 173 transitions, 1282 flow [2024-06-27 22:32:52,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 173 transitions, 1258 flow, removed 12 selfloop flow, removed 0 redundant places. [2024-06-27 22:32:52,162 INFO L231 Difference]: Finished difference. Result has 80 places, 106 transitions, 898 flow [2024-06-27 22:32:52,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=898, PETRI_PLACES=80, PETRI_TRANSITIONS=106} [2024-06-27 22:32:52,163 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 29 predicate places. [2024-06-27 22:32:52,163 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 106 transitions, 898 flow [2024-06-27 22:32:52,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:32:52,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:32:52,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:32:52,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 22:32:52,164 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:32:52,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:32:52,164 INFO L85 PathProgramCache]: Analyzing trace with hash 976907175, now seen corresponding path program 2 times [2024-06-27 22:32:52,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:32:52,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217930170] [2024-06-27 22:32:52,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:32:52,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:32:52,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:32:52,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:32:52,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:32:52,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217930170] [2024-06-27 22:32:52,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217930170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:32:52,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:32:52,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:32:52,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97644242] [2024-06-27 22:32:52,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:32:52,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:32:52,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:32:52,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:32:52,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:32:52,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:32:52,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 106 transitions, 898 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:32:52,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:32:52,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:32:52,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:32:53,046 INFO L124 PetriNetUnfolderBase]: 2313/3917 cut-off events. [2024-06-27 22:32:53,047 INFO L125 PetriNetUnfolderBase]: For 14529/14533 co-relation queries the response was YES. [2024-06-27 22:32:53,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15362 conditions, 3917 events. 2313/3917 cut-off events. For 14529/14533 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 24988 event pairs, 545 based on Foata normal form. 5/3883 useless extension candidates. Maximal degree in co-relation 15330. Up to 3100 conditions per place. [2024-06-27 22:32:53,074 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 92 selfloop transitions, 31 changer transitions 0/134 dead transitions. [2024-06-27 22:32:53,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 134 transitions, 1296 flow [2024-06-27 22:32:53,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 22:32:53,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 22:32:53,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2024-06-27 22:32:53,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6329787234042553 [2024-06-27 22:32:53,075 INFO L175 Difference]: Start difference. First operand has 80 places, 106 transitions, 898 flow. Second operand 4 states and 119 transitions. [2024-06-27 22:32:53,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 134 transitions, 1296 flow [2024-06-27 22:32:53,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 134 transitions, 1275 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-27 22:32:53,096 INFO L231 Difference]: Finished difference. Result has 82 places, 115 transitions, 1078 flow [2024-06-27 22:32:53,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=879, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1078, PETRI_PLACES=82, PETRI_TRANSITIONS=115} [2024-06-27 22:32:53,097 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 31 predicate places. [2024-06-27 22:32:53,097 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 115 transitions, 1078 flow [2024-06-27 22:32:53,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:32:53,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:32:53,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:32:53,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 22:32:53,097 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:32:53,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:32:53,098 INFO L85 PathProgramCache]: Analyzing trace with hash 360857823, now seen corresponding path program 3 times [2024-06-27 22:32:53,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:32:53,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260380931] [2024-06-27 22:32:53,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:32:53,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:32:53,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:32:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:32:53,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:32:53,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260380931] [2024-06-27 22:32:53,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260380931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:32:53,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:32:53,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:32:53,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495726111] [2024-06-27 22:32:53,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:32:53,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:32:53,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:32:53,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:32:53,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:32:53,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:32:53,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 115 transitions, 1078 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:32:53,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:32:53,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:32:53,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:32:53,865 INFO L124 PetriNetUnfolderBase]: 2305/3904 cut-off events. [2024-06-27 22:32:53,866 INFO L125 PetriNetUnfolderBase]: For 17216/17220 co-relation queries the response was YES. [2024-06-27 22:32:53,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15993 conditions, 3904 events. 2305/3904 cut-off events. For 17216/17220 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 24862 event pairs, 543 based on Foata normal form. 5/3872 useless extension candidates. Maximal degree in co-relation 15960. Up to 3028 conditions per place. [2024-06-27 22:32:53,889 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 98 selfloop transitions, 37 changer transitions 0/146 dead transitions. [2024-06-27 22:32:53,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 146 transitions, 1470 flow [2024-06-27 22:32:53,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:32:53,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:32:53,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-27 22:32:53,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6212765957446809 [2024-06-27 22:32:53,891 INFO L175 Difference]: Start difference. First operand has 82 places, 115 transitions, 1078 flow. Second operand 5 states and 146 transitions. [2024-06-27 22:32:53,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 146 transitions, 1470 flow [2024-06-27 22:32:53,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 146 transitions, 1409 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 22:32:53,911 INFO L231 Difference]: Finished difference. Result has 85 places, 118 transitions, 1150 flow [2024-06-27 22:32:53,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1150, PETRI_PLACES=85, PETRI_TRANSITIONS=118} [2024-06-27 22:32:53,911 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 34 predicate places. [2024-06-27 22:32:53,911 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 118 transitions, 1150 flow [2024-06-27 22:32:53,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:32:53,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:32:53,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:32:53,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 22:32:53,912 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:32:53,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:32:53,913 INFO L85 PathProgramCache]: Analyzing trace with hash 349239519, now seen corresponding path program 1 times [2024-06-27 22:32:53,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:32:53,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436838954] [2024-06-27 22:32:53,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:32:53,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:32:53,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:32:54,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:32:54,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:32:54,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436838954] [2024-06-27 22:32:54,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436838954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:32:54,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:32:54,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:32:54,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783736901] [2024-06-27 22:32:54,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:32:54,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:32:54,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:32:54,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:32:54,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:32:54,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:32:54,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 118 transitions, 1150 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:32:54,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:32:54,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:32:54,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:32:54,697 INFO L124 PetriNetUnfolderBase]: 2296/3905 cut-off events. [2024-06-27 22:32:54,698 INFO L125 PetriNetUnfolderBase]: For 19236/19251 co-relation queries the response was YES. [2024-06-27 22:32:54,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16355 conditions, 3905 events. 2296/3905 cut-off events. For 19236/19251 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 24956 event pairs, 666 based on Foata normal form. 12/3893 useless extension candidates. Maximal degree in co-relation 16321. Up to 3145 conditions per place. [2024-06-27 22:32:54,724 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 108 selfloop transitions, 31 changer transitions 0/150 dead transitions. [2024-06-27 22:32:54,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 150 transitions, 1532 flow [2024-06-27 22:32:54,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:32:54,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:32:54,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-27 22:32:54,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-06-27 22:32:54,725 INFO L175 Difference]: Start difference. First operand has 85 places, 118 transitions, 1150 flow. Second operand 5 states and 150 transitions. [2024-06-27 22:32:54,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 150 transitions, 1532 flow [2024-06-27 22:32:54,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 150 transitions, 1409 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-27 22:32:54,753 INFO L231 Difference]: Finished difference. Result has 87 places, 118 transitions, 1104 flow [2024-06-27 22:32:54,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1027, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1104, PETRI_PLACES=87, PETRI_TRANSITIONS=118} [2024-06-27 22:32:54,753 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 36 predicate places. [2024-06-27 22:32:54,753 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 118 transitions, 1104 flow [2024-06-27 22:32:54,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:32:54,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:32:54,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:32:54,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 22:32:54,754 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:32:54,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:32:54,755 INFO L85 PathProgramCache]: Analyzing trace with hash -2062199938, now seen corresponding path program 1 times [2024-06-27 22:32:54,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:32:54,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103060846] [2024-06-27 22:32:54,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:32:54,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:32:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:32:54,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:32:54,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:32:54,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103060846] [2024-06-27 22:32:54,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103060846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:32:54,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:32:54,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:32:54,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616214933] [2024-06-27 22:32:54,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:32:54,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:32:54,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:32:54,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:32:54,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:32:54,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:32:54,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 118 transitions, 1104 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:32:54,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:32:54,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:32:54,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:32:55,578 INFO L124 PetriNetUnfolderBase]: 2356/3972 cut-off events. [2024-06-27 22:32:55,578 INFO L125 PetriNetUnfolderBase]: For 19966/19970 co-relation queries the response was YES. [2024-06-27 22:32:55,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16634 conditions, 3972 events. 2356/3972 cut-off events. For 19966/19970 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 25228 event pairs, 479 based on Foata normal form. 5/3931 useless extension candidates. Maximal degree in co-relation 16599. Up to 3065 conditions per place. [2024-06-27 22:32:55,608 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 100 selfloop transitions, 42 changer transitions 0/153 dead transitions. [2024-06-27 22:32:55,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 153 transitions, 1546 flow [2024-06-27 22:32:55,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:32:55,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:32:55,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-27 22:32:55,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6297872340425532 [2024-06-27 22:32:55,609 INFO L175 Difference]: Start difference. First operand has 87 places, 118 transitions, 1104 flow. Second operand 5 states and 148 transitions. [2024-06-27 22:32:55,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 153 transitions, 1546 flow [2024-06-27 22:32:55,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 153 transitions, 1468 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 22:32:55,636 INFO L231 Difference]: Finished difference. Result has 87 places, 125 transitions, 1223 flow [2024-06-27 22:32:55,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1033, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1223, PETRI_PLACES=87, PETRI_TRANSITIONS=125} [2024-06-27 22:32:55,637 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 36 predicate places. [2024-06-27 22:32:55,637 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 125 transitions, 1223 flow [2024-06-27 22:32:55,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:32:55,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:32:55,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:32:55,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 22:32:55,638 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:32:55,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:32:55,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1698307678, now seen corresponding path program 2 times [2024-06-27 22:32:55,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:32:55,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688893407] [2024-06-27 22:32:55,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:32:55,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:32:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:32:55,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:32:55,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:32:55,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688893407] [2024-06-27 22:32:55,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688893407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:32:55,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:32:55,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:32:55,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101401601] [2024-06-27 22:32:55,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:32:55,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:32:55,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:32:55,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:32:55,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:32:55,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:32:55,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 125 transitions, 1223 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:32:55,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:32:55,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:32:55,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:32:56,474 INFO L124 PetriNetUnfolderBase]: 2517/4321 cut-off events. [2024-06-27 22:32:56,474 INFO L125 PetriNetUnfolderBase]: For 25279/25283 co-relation queries the response was YES. [2024-06-27 22:32:56,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18510 conditions, 4321 events. 2517/4321 cut-off events. For 25279/25283 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 28473 event pairs, 382 based on Foata normal form. 13/4286 useless extension candidates. Maximal degree in co-relation 18475. Up to 2739 conditions per place. [2024-06-27 22:32:56,545 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 111 selfloop transitions, 51 changer transitions 0/173 dead transitions. [2024-06-27 22:32:56,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 173 transitions, 1865 flow [2024-06-27 22:32:56,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:32:56,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:32:56,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-27 22:32:56,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6276595744680851 [2024-06-27 22:32:56,547 INFO L175 Difference]: Start difference. First operand has 87 places, 125 transitions, 1223 flow. Second operand 6 states and 177 transitions. [2024-06-27 22:32:56,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 173 transitions, 1865 flow [2024-06-27 22:32:56,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 173 transitions, 1772 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 22:32:56,576 INFO L231 Difference]: Finished difference. Result has 90 places, 131 transitions, 1369 flow [2024-06-27 22:32:56,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1130, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1369, PETRI_PLACES=90, PETRI_TRANSITIONS=131} [2024-06-27 22:32:56,577 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 39 predicate places. [2024-06-27 22:32:56,577 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 131 transitions, 1369 flow [2024-06-27 22:32:56,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:32:56,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:32:56,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:32:56,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 22:32:56,578 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:32:56,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:32:56,578 INFO L85 PathProgramCache]: Analyzing trace with hash -2058475288, now seen corresponding path program 3 times [2024-06-27 22:32:56,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:32:56,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494454907] [2024-06-27 22:32:56,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:32:56,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:32:56,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:32:56,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:32:56,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:32:56,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494454907] [2024-06-27 22:32:56,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494454907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:32:56,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:32:56,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:32:56,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956873961] [2024-06-27 22:32:56,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:32:56,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:32:56,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:32:56,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:32:56,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:32:56,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:32:56,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 131 transitions, 1369 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:32:56,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:32:56,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:32:56,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:32:57,429 INFO L124 PetriNetUnfolderBase]: 2497/4289 cut-off events. [2024-06-27 22:32:57,429 INFO L125 PetriNetUnfolderBase]: For 27242/27246 co-relation queries the response was YES. [2024-06-27 22:32:57,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18543 conditions, 4289 events. 2497/4289 cut-off events. For 27242/27246 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 28248 event pairs, 350 based on Foata normal form. 13/4260 useless extension candidates. Maximal degree in co-relation 18507. Up to 2733 conditions per place. [2024-06-27 22:32:57,456 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 105 selfloop transitions, 54 changer transitions 0/170 dead transitions. [2024-06-27 22:32:57,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 170 transitions, 1833 flow [2024-06-27 22:32:57,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:32:57,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:32:57,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-06-27 22:32:57,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6170212765957447 [2024-06-27 22:32:57,459 INFO L175 Difference]: Start difference. First operand has 90 places, 131 transitions, 1369 flow. Second operand 6 states and 174 transitions. [2024-06-27 22:32:57,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 170 transitions, 1833 flow [2024-06-27 22:32:57,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 170 transitions, 1763 flow, removed 26 selfloop flow, removed 1 redundant places. [2024-06-27 22:32:57,488 INFO L231 Difference]: Finished difference. Result has 95 places, 131 transitions, 1416 flow [2024-06-27 22:32:57,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1299, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1416, PETRI_PLACES=95, PETRI_TRANSITIONS=131} [2024-06-27 22:32:57,489 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 44 predicate places. [2024-06-27 22:32:57,490 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 131 transitions, 1416 flow [2024-06-27 22:32:57,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:32:57,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:32:57,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:32:57,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 22:32:57,490 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:32:57,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:32:57,491 INFO L85 PathProgramCache]: Analyzing trace with hash -648994921, now seen corresponding path program 1 times [2024-06-27 22:32:57,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:32:57,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119744405] [2024-06-27 22:32:57,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:32:57,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:32:57,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:32:57,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:32:57,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:32:57,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119744405] [2024-06-27 22:32:57,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119744405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:32:57,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:32:57,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 22:32:57,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159898600] [2024-06-27 22:32:57,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:32:57,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 22:32:57,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:32:57,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 22:32:57,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 22:32:57,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-06-27 22:32:57,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 131 transitions, 1416 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:32:57,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:32:57,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-06-27 22:32:57,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:32:58,092 INFO L124 PetriNetUnfolderBase]: 2118/3869 cut-off events. [2024-06-27 22:32:58,092 INFO L125 PetriNetUnfolderBase]: For 23114/23127 co-relation queries the response was YES. [2024-06-27 22:32:58,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16434 conditions, 3869 events. 2118/3869 cut-off events. For 23114/23127 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 27153 event pairs, 629 based on Foata normal form. 12/3837 useless extension candidates. Maximal degree in co-relation 16396. Up to 2955 conditions per place. [2024-06-27 22:32:58,117 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 119 selfloop transitions, 14 changer transitions 0/164 dead transitions. [2024-06-27 22:32:58,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 164 transitions, 1896 flow [2024-06-27 22:32:58,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 22:32:58,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 22:32:58,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-06-27 22:32:58,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675531914893617 [2024-06-27 22:32:58,119 INFO L175 Difference]: Start difference. First operand has 95 places, 131 transitions, 1416 flow. Second operand 4 states and 127 transitions. [2024-06-27 22:32:58,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 164 transitions, 1896 flow [2024-06-27 22:32:58,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 164 transitions, 1800 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 22:32:58,149 INFO L231 Difference]: Finished difference. Result has 96 places, 139 transitions, 1476 flow [2024-06-27 22:32:58,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1320, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1476, PETRI_PLACES=96, PETRI_TRANSITIONS=139} [2024-06-27 22:32:58,149 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 45 predicate places. [2024-06-27 22:32:58,149 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 139 transitions, 1476 flow [2024-06-27 22:32:58,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:32:58,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:32:58,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:32:58,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 22:32:58,150 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:32:58,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:32:58,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1789988314, now seen corresponding path program 1 times [2024-06-27 22:32:58,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:32:58,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891718587] [2024-06-27 22:32:58,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:32:58,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:32:58,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:32:58,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:32:58,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:32:58,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891718587] [2024-06-27 22:32:58,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891718587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:32:58,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:32:58,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:32:58,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247162454] [2024-06-27 22:32:58,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:32:58,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:32:58,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:32:58,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:32:58,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:32:58,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:32:58,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 139 transitions, 1476 flow. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 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) [2024-06-27 22:32:58,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:32:58,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:32:58,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:32:59,274 INFO L124 PetriNetUnfolderBase]: 2528/4307 cut-off events. [2024-06-27 22:32:59,274 INFO L125 PetriNetUnfolderBase]: For 26657/26661 co-relation queries the response was YES. [2024-06-27 22:32:59,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18862 conditions, 4307 events. 2528/4307 cut-off events. For 26657/26661 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 28149 event pairs, 394 based on Foata normal form. 9/4263 useless extension candidates. Maximal degree in co-relation 18822. Up to 2943 conditions per place. [2024-06-27 22:32:59,302 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 131 selfloop transitions, 56 changer transitions 0/198 dead transitions. [2024-06-27 22:32:59,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 198 transitions, 2143 flow [2024-06-27 22:32:59,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:32:59,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:32:59,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-27 22:32:59,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6524822695035462 [2024-06-27 22:32:59,304 INFO L175 Difference]: Start difference. First operand has 96 places, 139 transitions, 1476 flow. Second operand 6 states and 184 transitions. [2024-06-27 22:32:59,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 198 transitions, 2143 flow [2024-06-27 22:32:59,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 198 transitions, 2109 flow, removed 17 selfloop flow, removed 0 redundant places. [2024-06-27 22:32:59,346 INFO L231 Difference]: Finished difference. Result has 104 places, 148 transitions, 1776 flow [2024-06-27 22:32:59,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1416, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1776, PETRI_PLACES=104, PETRI_TRANSITIONS=148} [2024-06-27 22:32:59,347 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 53 predicate places. [2024-06-27 22:32:59,347 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 148 transitions, 1776 flow [2024-06-27 22:32:59,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 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) [2024-06-27 22:32:59,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:32:59,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:32:59,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 22:32:59,348 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:32:59,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:32:59,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1355995393, now seen corresponding path program 1 times [2024-06-27 22:32:59,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:32:59,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143873591] [2024-06-27 22:32:59,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:32:59,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:32:59,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:32:59,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:32:59,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:32:59,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143873591] [2024-06-27 22:32:59,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143873591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:32:59,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:32:59,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 22:32:59,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427722752] [2024-06-27 22:32:59,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:32:59,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 22:32:59,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:32:59,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 22:32:59,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-27 22:32:59,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-06-27 22:32:59,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 148 transitions, 1776 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:32:59,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:32:59,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-06-27 22:32:59,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:00,217 INFO L124 PetriNetUnfolderBase]: 2135/3906 cut-off events. [2024-06-27 22:33:00,218 INFO L125 PetriNetUnfolderBase]: For 29042/29054 co-relation queries the response was YES. [2024-06-27 22:33:00,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17893 conditions, 3906 events. 2135/3906 cut-off events. For 29042/29054 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 27451 event pairs, 642 based on Foata normal form. 12/3872 useless extension candidates. Maximal degree in co-relation 17847. Up to 2987 conditions per place. [2024-06-27 22:33:00,248 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 124 selfloop transitions, 14 changer transitions 0/172 dead transitions. [2024-06-27 22:33:00,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 172 transitions, 2144 flow [2024-06-27 22:33:00,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 22:33:00,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 22:33:00,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-06-27 22:33:00,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6648936170212766 [2024-06-27 22:33:00,251 INFO L175 Difference]: Start difference. First operand has 104 places, 148 transitions, 1776 flow. Second operand 4 states and 125 transitions. [2024-06-27 22:33:00,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 172 transitions, 2144 flow [2024-06-27 22:33:00,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 172 transitions, 2104 flow, removed 20 selfloop flow, removed 0 redundant places. [2024-06-27 22:33:00,306 INFO L231 Difference]: Finished difference. Result has 108 places, 148 transitions, 1778 flow [2024-06-27 22:33:00,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1736, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1778, PETRI_PLACES=108, PETRI_TRANSITIONS=148} [2024-06-27 22:33:00,306 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 57 predicate places. [2024-06-27 22:33:00,307 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 148 transitions, 1778 flow [2024-06-27 22:33:00,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:00,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:00,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:00,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 22:33:00,308 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:00,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:00,308 INFO L85 PathProgramCache]: Analyzing trace with hash 589902718, now seen corresponding path program 1 times [2024-06-27 22:33:00,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:00,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451290731] [2024-06-27 22:33:00,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:00,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:00,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:00,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:00,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:00,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451290731] [2024-06-27 22:33:00,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451290731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:00,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:00,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 22:33:00,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272325352] [2024-06-27 22:33:00,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:00,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 22:33:00,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:00,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 22:33:00,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 22:33:00,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-06-27 22:33:00,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 148 transitions, 1778 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:00,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:00,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-06-27 22:33:00,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:01,018 INFO L124 PetriNetUnfolderBase]: 2151/3886 cut-off events. [2024-06-27 22:33:01,019 INFO L125 PetriNetUnfolderBase]: For 27919/27931 co-relation queries the response was YES. [2024-06-27 22:33:01,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17798 conditions, 3886 events. 2151/3886 cut-off events. For 27919/27931 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 26880 event pairs, 438 based on Foata normal form. 13/3849 useless extension candidates. Maximal degree in co-relation 17749. Up to 2551 conditions per place. [2024-06-27 22:33:01,045 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 112 selfloop transitions, 37 changer transitions 0/183 dead transitions. [2024-06-27 22:33:01,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 183 transitions, 2239 flow [2024-06-27 22:33:01,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:33:01,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:33:01,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2024-06-27 22:33:01,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6680851063829787 [2024-06-27 22:33:01,046 INFO L175 Difference]: Start difference. First operand has 108 places, 148 transitions, 1778 flow. Second operand 5 states and 157 transitions. [2024-06-27 22:33:01,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 183 transitions, 2239 flow [2024-06-27 22:33:01,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 183 transitions, 2199 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 22:33:01,090 INFO L231 Difference]: Finished difference. Result has 110 places, 152 transitions, 1889 flow [2024-06-27 22:33:01,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1742, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1889, PETRI_PLACES=110, PETRI_TRANSITIONS=152} [2024-06-27 22:33:01,091 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 59 predicate places. [2024-06-27 22:33:01,091 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 152 transitions, 1889 flow [2024-06-27 22:33:01,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:01,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:01,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:01,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 22:33:01,092 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:01,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:01,092 INFO L85 PathProgramCache]: Analyzing trace with hash -913829162, now seen corresponding path program 2 times [2024-06-27 22:33:01,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:01,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130444158] [2024-06-27 22:33:01,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:01,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:01,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:01,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:01,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:01,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130444158] [2024-06-27 22:33:01,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130444158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:01,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:01,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 22:33:01,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698047726] [2024-06-27 22:33:01,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:01,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 22:33:01,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:01,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 22:33:01,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 22:33:01,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-06-27 22:33:01,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 152 transitions, 1889 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:01,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:01,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-06-27 22:33:01,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:01,919 INFO L124 PetriNetUnfolderBase]: 2169/3900 cut-off events. [2024-06-27 22:33:01,919 INFO L125 PetriNetUnfolderBase]: For 30786/30808 co-relation queries the response was YES. [2024-06-27 22:33:01,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18297 conditions, 3900 events. 2169/3900 cut-off events. For 30786/30808 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27031 event pairs, 486 based on Foata normal form. 12/3837 useless extension candidates. Maximal degree in co-relation 18247. Up to 2381 conditions per place. [2024-06-27 22:33:01,946 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 109 selfloop transitions, 43 changer transitions 0/186 dead transitions. [2024-06-27 22:33:01,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 186 transitions, 2371 flow [2024-06-27 22:33:01,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:33:01,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:33:01,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-27 22:33:01,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-06-27 22:33:01,947 INFO L175 Difference]: Start difference. First operand has 110 places, 152 transitions, 1889 flow. Second operand 5 states and 150 transitions. [2024-06-27 22:33:01,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 186 transitions, 2371 flow [2024-06-27 22:33:01,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 186 transitions, 2319 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 22:33:01,993 INFO L231 Difference]: Finished difference. Result has 114 places, 157 transitions, 2013 flow [2024-06-27 22:33:01,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1839, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2013, PETRI_PLACES=114, PETRI_TRANSITIONS=157} [2024-06-27 22:33:01,994 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 63 predicate places. [2024-06-27 22:33:01,994 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 157 transitions, 2013 flow [2024-06-27 22:33:01,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:01,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:01,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:01,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 22:33:01,994 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:01,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:01,995 INFO L85 PathProgramCache]: Analyzing trace with hash -2042438294, now seen corresponding path program 1 times [2024-06-27 22:33:01,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:01,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034207237] [2024-06-27 22:33:01,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:01,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:02,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:02,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:02,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034207237] [2024-06-27 22:33:02,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034207237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:02,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:02,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 22:33:02,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43985745] [2024-06-27 22:33:02,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:02,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 22:33:02,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:02,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 22:33:02,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 22:33:02,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:33:02,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 157 transitions, 2013 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:02,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:02,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:33:02,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:02,702 INFO L124 PetriNetUnfolderBase]: 2566/4400 cut-off events. [2024-06-27 22:33:02,702 INFO L125 PetriNetUnfolderBase]: For 37432/37432 co-relation queries the response was YES. [2024-06-27 22:33:02,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21593 conditions, 4400 events. 2566/4400 cut-off events. For 37432/37432 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 29024 event pairs, 677 based on Foata normal form. 1/4355 useless extension candidates. Maximal degree in co-relation 21541. Up to 3607 conditions per place. [2024-06-27 22:33:02,736 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 171 selfloop transitions, 21 changer transitions 0/203 dead transitions. [2024-06-27 22:33:02,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 203 transitions, 2690 flow [2024-06-27 22:33:02,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:33:02,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:33:02,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-27 22:33:02,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6425531914893617 [2024-06-27 22:33:02,737 INFO L175 Difference]: Start difference. First operand has 114 places, 157 transitions, 2013 flow. Second operand 5 states and 151 transitions. [2024-06-27 22:33:02,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 203 transitions, 2690 flow [2024-06-27 22:33:02,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 203 transitions, 2629 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-06-27 22:33:02,800 INFO L231 Difference]: Finished difference. Result has 119 places, 165 transitions, 2137 flow [2024-06-27 22:33:02,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1952, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2137, PETRI_PLACES=119, PETRI_TRANSITIONS=165} [2024-06-27 22:33:02,800 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 68 predicate places. [2024-06-27 22:33:02,800 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 165 transitions, 2137 flow [2024-06-27 22:33:02,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:02,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:02,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:02,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 22:33:02,801 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:02,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:02,802 INFO L85 PathProgramCache]: Analyzing trace with hash 602836600, now seen corresponding path program 2 times [2024-06-27 22:33:02,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:02,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568608691] [2024-06-27 22:33:02,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:02,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:02,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:02,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:02,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568608691] [2024-06-27 22:33:02,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568608691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:02,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:02,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 22:33:02,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159499241] [2024-06-27 22:33:02,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:02,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 22:33:02,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:02,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 22:33:02,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 22:33:02,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:33:02,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 165 transitions, 2137 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:02,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:02,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:33:02,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:03,478 INFO L124 PetriNetUnfolderBase]: 2571/4400 cut-off events. [2024-06-27 22:33:03,478 INFO L125 PetriNetUnfolderBase]: For 41059/41080 co-relation queries the response was YES. [2024-06-27 22:33:03,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21834 conditions, 4400 events. 2571/4400 cut-off events. For 41059/41080 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 28968 event pairs, 687 based on Foata normal form. 15/4366 useless extension candidates. Maximal degree in co-relation 21779. Up to 3611 conditions per place. [2024-06-27 22:33:03,509 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 166 selfloop transitions, 25 changer transitions 0/202 dead transitions. [2024-06-27 22:33:03,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 202 transitions, 2761 flow [2024-06-27 22:33:03,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:33:03,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:33:03,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-27 22:33:03,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625531914893617 [2024-06-27 22:33:03,510 INFO L175 Difference]: Start difference. First operand has 119 places, 165 transitions, 2137 flow. Second operand 5 states and 147 transitions. [2024-06-27 22:33:03,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 202 transitions, 2761 flow [2024-06-27 22:33:03,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 202 transitions, 2703 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-27 22:33:03,577 INFO L231 Difference]: Finished difference. Result has 123 places, 169 transitions, 2206 flow [2024-06-27 22:33:03,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2079, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2206, PETRI_PLACES=123, PETRI_TRANSITIONS=169} [2024-06-27 22:33:03,577 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 72 predicate places. [2024-06-27 22:33:03,577 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 169 transitions, 2206 flow [2024-06-27 22:33:03,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:03,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:03,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:03,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 22:33:03,578 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:03,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:03,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1605441988, now seen corresponding path program 1 times [2024-06-27 22:33:03,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:03,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847724675] [2024-06-27 22:33:03,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:03,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:03,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:03,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:03,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:03,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847724675] [2024-06-27 22:33:03,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847724675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:03,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:03,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:33:03,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179517891] [2024-06-27 22:33:03,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:03,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:33:03,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:03,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:33:03,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:33:03,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-06-27 22:33:03,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 169 transitions, 2206 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:03,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:03,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-06-27 22:33:03,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:04,453 INFO L124 PetriNetUnfolderBase]: 2234/4058 cut-off events. [2024-06-27 22:33:04,453 INFO L125 PetriNetUnfolderBase]: For 38565/38577 co-relation queries the response was YES. [2024-06-27 22:33:04,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20004 conditions, 4058 events. 2234/4058 cut-off events. For 38565/38577 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 28376 event pairs, 374 based on Foata normal form. 16/4035 useless extension candidates. Maximal degree in co-relation 19947. Up to 2642 conditions per place. [2024-06-27 22:33:04,485 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 126 selfloop transitions, 40 changer transitions 0/204 dead transitions. [2024-06-27 22:33:04,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 204 transitions, 2677 flow [2024-06-27 22:33:04,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:33:04,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:33:04,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2024-06-27 22:33:04,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6680851063829787 [2024-06-27 22:33:04,494 INFO L175 Difference]: Start difference. First operand has 123 places, 169 transitions, 2206 flow. Second operand 5 states and 157 transitions. [2024-06-27 22:33:04,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 204 transitions, 2677 flow [2024-06-27 22:33:04,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 204 transitions, 2574 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-27 22:33:04,559 INFO L231 Difference]: Finished difference. Result has 126 places, 172 transitions, 2265 flow [2024-06-27 22:33:04,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2108, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2265, PETRI_PLACES=126, PETRI_TRANSITIONS=172} [2024-06-27 22:33:04,560 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 75 predicate places. [2024-06-27 22:33:04,560 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 172 transitions, 2265 flow [2024-06-27 22:33:04,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:04,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:04,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:04,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 22:33:04,560 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:04,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:04,561 INFO L85 PathProgramCache]: Analyzing trace with hash 12223818, now seen corresponding path program 2 times [2024-06-27 22:33:04,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:04,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92479688] [2024-06-27 22:33:04,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:04,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:04,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:04,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:04,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:04,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92479688] [2024-06-27 22:33:04,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92479688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:04,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:04,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:33:04,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409878067] [2024-06-27 22:33:04,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:04,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:33:04,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:04,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:33:04,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:33:04,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-06-27 22:33:04,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 172 transitions, 2265 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:04,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:04,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-06-27 22:33:04,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:05,717 INFO L124 PetriNetUnfolderBase]: 2307/4158 cut-off events. [2024-06-27 22:33:05,717 INFO L125 PetriNetUnfolderBase]: For 43953/43977 co-relation queries the response was YES. [2024-06-27 22:33:05,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20763 conditions, 4158 events. 2307/4158 cut-off events. For 43953/43977 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 29154 event pairs, 432 based on Foata normal form. 16/4112 useless extension candidates. Maximal degree in co-relation 20704. Up to 2473 conditions per place. [2024-06-27 22:33:05,750 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 118 selfloop transitions, 57 changer transitions 0/213 dead transitions. [2024-06-27 22:33:05,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 213 transitions, 2836 flow [2024-06-27 22:33:05,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:33:05,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:33:05,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-27 22:33:05,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-06-27 22:33:05,751 INFO L175 Difference]: Start difference. First operand has 126 places, 172 transitions, 2265 flow. Second operand 6 states and 180 transitions. [2024-06-27 22:33:05,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 213 transitions, 2836 flow [2024-06-27 22:33:05,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 213 transitions, 2747 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-27 22:33:05,811 INFO L231 Difference]: Finished difference. Result has 130 places, 175 transitions, 2379 flow [2024-06-27 22:33:05,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2178, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2379, PETRI_PLACES=130, PETRI_TRANSITIONS=175} [2024-06-27 22:33:05,811 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 79 predicate places. [2024-06-27 22:33:05,811 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 175 transitions, 2379 flow [2024-06-27 22:33:05,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:05,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:05,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:05,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 22:33:05,812 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:05,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:05,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1736068514, now seen corresponding path program 3 times [2024-06-27 22:33:05,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:05,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315404119] [2024-06-27 22:33:05,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:05,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:05,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:06,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:06,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:06,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315404119] [2024-06-27 22:33:06,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315404119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:06,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:06,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:33:06,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695422053] [2024-06-27 22:33:06,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:06,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:33:06,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:06,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:33:06,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:33:06,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-06-27 22:33:06,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 175 transitions, 2379 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:06,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:06,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-06-27 22:33:06,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:06,853 INFO L124 PetriNetUnfolderBase]: 2360/4302 cut-off events. [2024-06-27 22:33:06,853 INFO L125 PetriNetUnfolderBase]: For 45549/45571 co-relation queries the response was YES. [2024-06-27 22:33:06,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21429 conditions, 4302 events. 2360/4302 cut-off events. For 45549/45571 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 30786 event pairs, 419 based on Foata normal form. 14/4248 useless extension candidates. Maximal degree in co-relation 21369. Up to 2507 conditions per place. [2024-06-27 22:33:06,887 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 120 selfloop transitions, 51 changer transitions 0/209 dead transitions. [2024-06-27 22:33:06,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 209 transitions, 2883 flow [2024-06-27 22:33:06,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:33:06,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:33:06,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-27 22:33:06,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6425531914893617 [2024-06-27 22:33:06,888 INFO L175 Difference]: Start difference. First operand has 130 places, 175 transitions, 2379 flow. Second operand 5 states and 151 transitions. [2024-06-27 22:33:06,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 209 transitions, 2883 flow [2024-06-27 22:33:06,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 209 transitions, 2761 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 22:33:06,956 INFO L231 Difference]: Finished difference. Result has 131 places, 179 transitions, 2448 flow [2024-06-27 22:33:06,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2263, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2448, PETRI_PLACES=131, PETRI_TRANSITIONS=179} [2024-06-27 22:33:06,957 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 80 predicate places. [2024-06-27 22:33:06,957 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 179 transitions, 2448 flow [2024-06-27 22:33:06,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:06,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:06,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:06,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 22:33:06,957 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:06,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:06,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1108773843, now seen corresponding path program 1 times [2024-06-27 22:33:06,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:06,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829460413] [2024-06-27 22:33:06,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:06,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:06,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:07,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:07,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:07,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829460413] [2024-06-27 22:33:07,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829460413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:07,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:07,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:33:07,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809148233] [2024-06-27 22:33:07,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:07,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:33:07,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:07,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:33:07,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:33:07,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:33:07,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 179 transitions, 2448 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:07,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:07,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:33:07,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:07,766 INFO L124 PetriNetUnfolderBase]: 2832/4887 cut-off events. [2024-06-27 22:33:07,766 INFO L125 PetriNetUnfolderBase]: For 51036/51036 co-relation queries the response was YES. [2024-06-27 22:33:07,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24795 conditions, 4887 events. 2832/4887 cut-off events. For 51036/51036 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 33103 event pairs, 753 based on Foata normal form. 1/4833 useless extension candidates. Maximal degree in co-relation 24734. Up to 3865 conditions per place. [2024-06-27 22:33:07,863 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 196 selfloop transitions, 32 changer transitions 0/239 dead transitions. [2024-06-27 22:33:07,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 239 transitions, 3343 flow [2024-06-27 22:33:07,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:33:07,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:33:07,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-27 22:33:07,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.648936170212766 [2024-06-27 22:33:07,864 INFO L175 Difference]: Start difference. First operand has 131 places, 179 transitions, 2448 flow. Second operand 6 states and 183 transitions. [2024-06-27 22:33:07,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 239 transitions, 3343 flow [2024-06-27 22:33:07,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 239 transitions, 3256 flow, removed 29 selfloop flow, removed 1 redundant places. [2024-06-27 22:33:07,946 INFO L231 Difference]: Finished difference. Result has 137 places, 187 transitions, 2576 flow [2024-06-27 22:33:07,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2361, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2576, PETRI_PLACES=137, PETRI_TRANSITIONS=187} [2024-06-27 22:33:07,947 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 86 predicate places. [2024-06-27 22:33:07,947 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 187 transitions, 2576 flow [2024-06-27 22:33:07,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:07,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:07,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:07,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 22:33:07,947 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:07,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:07,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1108923573, now seen corresponding path program 2 times [2024-06-27 22:33:07,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:07,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105328447] [2024-06-27 22:33:07,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:07,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:07,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:08,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:08,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:08,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105328447] [2024-06-27 22:33:08,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105328447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:08,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:08,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:33:08,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654293300] [2024-06-27 22:33:08,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:08,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:33:08,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:08,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:33:08,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:33:08,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:33:08,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 187 transitions, 2576 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:08,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:08,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:33:08,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:08,765 INFO L124 PetriNetUnfolderBase]: 2855/4916 cut-off events. [2024-06-27 22:33:08,766 INFO L125 PetriNetUnfolderBase]: For 52739/52739 co-relation queries the response was YES. [2024-06-27 22:33:08,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24784 conditions, 4916 events. 2855/4916 cut-off events. For 52739/52739 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 33316 event pairs, 751 based on Foata normal form. 1/4862 useless extension candidates. Maximal degree in co-relation 24720. Up to 3881 conditions per place. [2024-06-27 22:33:08,805 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 188 selfloop transitions, 36 changer transitions 0/235 dead transitions. [2024-06-27 22:33:08,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 235 transitions, 3324 flow [2024-06-27 22:33:08,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:33:08,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:33:08,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-27 22:33:08,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6312056737588653 [2024-06-27 22:33:08,806 INFO L175 Difference]: Start difference. First operand has 137 places, 187 transitions, 2576 flow. Second operand 6 states and 178 transitions. [2024-06-27 22:33:08,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 235 transitions, 3324 flow [2024-06-27 22:33:08,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 235 transitions, 3197 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-06-27 22:33:08,890 INFO L231 Difference]: Finished difference. Result has 141 places, 191 transitions, 2608 flow [2024-06-27 22:33:08,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2451, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2608, PETRI_PLACES=141, PETRI_TRANSITIONS=191} [2024-06-27 22:33:08,891 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 90 predicate places. [2024-06-27 22:33:08,891 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 191 transitions, 2608 flow [2024-06-27 22:33:08,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:08,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:08,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:08,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 22:33:08,892 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:08,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:08,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1529599586, now seen corresponding path program 1 times [2024-06-27 22:33:08,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:08,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583831111] [2024-06-27 22:33:08,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:08,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:08,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:09,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:09,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:09,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583831111] [2024-06-27 22:33:09,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583831111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:09,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:09,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:33:09,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379351791] [2024-06-27 22:33:09,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:09,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:33:09,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:09,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:33:09,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:33:09,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:33:09,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 191 transitions, 2608 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:09,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:09,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:33:09,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:09,866 INFO L124 PetriNetUnfolderBase]: 2901/4997 cut-off events. [2024-06-27 22:33:09,866 INFO L125 PetriNetUnfolderBase]: For 55312/55312 co-relation queries the response was YES. [2024-06-27 22:33:09,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25495 conditions, 4997 events. 2901/4997 cut-off events. For 55312/55312 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 33850 event pairs, 756 based on Foata normal form. 2/4944 useless extension candidates. Maximal degree in co-relation 25429. Up to 4059 conditions per place. [2024-06-27 22:33:09,907 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 202 selfloop transitions, 27 changer transitions 0/240 dead transitions. [2024-06-27 22:33:09,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 240 transitions, 3389 flow [2024-06-27 22:33:09,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:33:09,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:33:09,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-27 22:33:09,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6276595744680851 [2024-06-27 22:33:09,908 INFO L175 Difference]: Start difference. First operand has 141 places, 191 transitions, 2608 flow. Second operand 6 states and 177 transitions. [2024-06-27 22:33:09,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 240 transitions, 3389 flow [2024-06-27 22:33:09,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 240 transitions, 3285 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-27 22:33:10,001 INFO L231 Difference]: Finished difference. Result has 144 places, 193 transitions, 2601 flow [2024-06-27 22:33:10,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2505, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2601, PETRI_PLACES=144, PETRI_TRANSITIONS=193} [2024-06-27 22:33:10,002 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 93 predicate places. [2024-06-27 22:33:10,002 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 193 transitions, 2601 flow [2024-06-27 22:33:10,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:10,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:10,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:10,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 22:33:10,003 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:10,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:10,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1549178460, now seen corresponding path program 2 times [2024-06-27 22:33:10,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:10,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289331937] [2024-06-27 22:33:10,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:10,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:10,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:10,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:10,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:10,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289331937] [2024-06-27 22:33:10,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289331937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:10,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:10,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:33:10,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915509441] [2024-06-27 22:33:10,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:10,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:33:10,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:10,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:33:10,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:33:10,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:33:10,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 193 transitions, 2601 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:10,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:10,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:33:10,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:11,118 INFO L124 PetriNetUnfolderBase]: 2947/5057 cut-off events. [2024-06-27 22:33:11,118 INFO L125 PetriNetUnfolderBase]: For 59102/59123 co-relation queries the response was YES. [2024-06-27 22:33:11,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25990 conditions, 5057 events. 2947/5057 cut-off events. For 59102/59123 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 34149 event pairs, 784 based on Foata normal form. 16/5015 useless extension candidates. Maximal degree in co-relation 25923. Up to 4097 conditions per place. [2024-06-27 22:33:11,160 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 196 selfloop transitions, 30 changer transitions 0/237 dead transitions. [2024-06-27 22:33:11,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 237 transitions, 3367 flow [2024-06-27 22:33:11,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:33:11,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:33:11,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-27 22:33:11,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6134751773049646 [2024-06-27 22:33:11,163 INFO L175 Difference]: Start difference. First operand has 144 places, 193 transitions, 2601 flow. Second operand 6 states and 173 transitions. [2024-06-27 22:33:11,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 237 transitions, 3367 flow [2024-06-27 22:33:11,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 237 transitions, 3303 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 22:33:11,298 INFO L231 Difference]: Finished difference. Result has 146 places, 195 transitions, 2643 flow [2024-06-27 22:33:11,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2541, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2643, PETRI_PLACES=146, PETRI_TRANSITIONS=195} [2024-06-27 22:33:11,299 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 95 predicate places. [2024-06-27 22:33:11,299 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 195 transitions, 2643 flow [2024-06-27 22:33:11,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:11,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:11,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:11,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 22:33:11,300 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:11,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:11,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1736252809, now seen corresponding path program 3 times [2024-06-27 22:33:11,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:11,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085525911] [2024-06-27 22:33:11,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:11,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:11,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:11,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:11,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085525911] [2024-06-27 22:33:11,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085525911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:11,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:11,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:33:11,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819204581] [2024-06-27 22:33:11,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:11,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:33:11,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:11,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:33:11,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:33:11,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:33:11,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 195 transitions, 2643 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:11,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:11,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:33:11,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:12,199 INFO L124 PetriNetUnfolderBase]: 2952/5057 cut-off events. [2024-06-27 22:33:12,199 INFO L125 PetriNetUnfolderBase]: For 59287/59296 co-relation queries the response was YES. [2024-06-27 22:33:12,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26022 conditions, 5057 events. 2952/5057 cut-off events. For 59287/59296 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 34178 event pairs, 797 based on Foata normal form. 7/5001 useless extension candidates. Maximal degree in co-relation 25954. Up to 3923 conditions per place. [2024-06-27 22:33:12,241 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 184 selfloop transitions, 43 changer transitions 0/238 dead transitions. [2024-06-27 22:33:12,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 238 transitions, 3397 flow [2024-06-27 22:33:12,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:33:12,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:33:12,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-06-27 22:33:12,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6170212765957447 [2024-06-27 22:33:12,242 INFO L175 Difference]: Start difference. First operand has 146 places, 195 transitions, 2643 flow. Second operand 6 states and 174 transitions. [2024-06-27 22:33:12,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 238 transitions, 3397 flow [2024-06-27 22:33:12,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 238 transitions, 3331 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 22:33:12,352 INFO L231 Difference]: Finished difference. Result has 148 places, 199 transitions, 2754 flow [2024-06-27 22:33:12,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2577, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2754, PETRI_PLACES=148, PETRI_TRANSITIONS=199} [2024-06-27 22:33:12,352 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 97 predicate places. [2024-06-27 22:33:12,352 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 199 transitions, 2754 flow [2024-06-27 22:33:12,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:12,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:12,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:12,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 22:33:12,353 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:12,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:12,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1557488940, now seen corresponding path program 3 times [2024-06-27 22:33:12,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:12,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061620265] [2024-06-27 22:33:12,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:12,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:12,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:12,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:12,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:12,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061620265] [2024-06-27 22:33:12,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061620265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:12,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:12,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:33:12,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471935965] [2024-06-27 22:33:12,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:12,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:33:12,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:12,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:33:12,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:33:12,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:33:12,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 199 transitions, 2754 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:12,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:12,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:33:12,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:13,338 INFO L124 PetriNetUnfolderBase]: 2986/5124 cut-off events. [2024-06-27 22:33:13,338 INFO L125 PetriNetUnfolderBase]: For 60253/60274 co-relation queries the response was YES. [2024-06-27 22:33:13,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26629 conditions, 5124 events. 2986/5124 cut-off events. For 60253/60274 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 34726 event pairs, 731 based on Foata normal form. 16/5083 useless extension candidates. Maximal degree in co-relation 26560. Up to 4136 conditions per place. [2024-06-27 22:33:13,396 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 190 selfloop transitions, 39 changer transitions 0/240 dead transitions. [2024-06-27 22:33:13,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 240 transitions, 3518 flow [2024-06-27 22:33:13,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:33:13,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:33:13,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-27 22:33:13,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6297872340425532 [2024-06-27 22:33:13,399 INFO L175 Difference]: Start difference. First operand has 148 places, 199 transitions, 2754 flow. Second operand 5 states and 148 transitions. [2024-06-27 22:33:13,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 240 transitions, 3518 flow [2024-06-27 22:33:13,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 240 transitions, 3398 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-27 22:33:13,513 INFO L231 Difference]: Finished difference. Result has 151 places, 209 transitions, 2958 flow [2024-06-27 22:33:13,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2639, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2958, PETRI_PLACES=151, PETRI_TRANSITIONS=209} [2024-06-27 22:33:13,513 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 100 predicate places. [2024-06-27 22:33:13,514 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 209 transitions, 2958 flow [2024-06-27 22:33:13,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:13,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:13,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:13,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 22:33:13,514 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:13,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:13,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1777579597, now seen corresponding path program 1 times [2024-06-27 22:33:13,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:13,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368775364] [2024-06-27 22:33:13,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:13,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:13,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:13,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:13,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368775364] [2024-06-27 22:33:13,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368775364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:13,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:13,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:33:13,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687107815] [2024-06-27 22:33:13,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:13,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:33:13,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:13,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:33:13,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:33:13,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:33:13,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 209 transitions, 2958 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:13,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:13,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:33:13,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:14,453 INFO L124 PetriNetUnfolderBase]: 3086/5279 cut-off events. [2024-06-27 22:33:14,453 INFO L125 PetriNetUnfolderBase]: For 64828/64834 co-relation queries the response was YES. [2024-06-27 22:33:14,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27842 conditions, 5279 events. 3086/5279 cut-off events. For 64828/64834 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 35842 event pairs, 673 based on Foata normal form. 7/5240 useless extension candidates. Maximal degree in co-relation 27770. Up to 4005 conditions per place. [2024-06-27 22:33:14,492 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 209 selfloop transitions, 65 changer transitions 0/285 dead transitions. [2024-06-27 22:33:14,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 285 transitions, 4064 flow [2024-06-27 22:33:14,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:33:14,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:33:14,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-27 22:33:14,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6443768996960486 [2024-06-27 22:33:14,495 INFO L175 Difference]: Start difference. First operand has 151 places, 209 transitions, 2958 flow. Second operand 7 states and 212 transitions. [2024-06-27 22:33:14,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 285 transitions, 4064 flow [2024-06-27 22:33:14,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 285 transitions, 3936 flow, removed 64 selfloop flow, removed 0 redundant places. [2024-06-27 22:33:14,613 INFO L231 Difference]: Finished difference. Result has 160 places, 224 transitions, 3293 flow [2024-06-27 22:33:14,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2830, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3293, PETRI_PLACES=160, PETRI_TRANSITIONS=224} [2024-06-27 22:33:14,613 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 109 predicate places. [2024-06-27 22:33:14,613 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 224 transitions, 3293 flow [2024-06-27 22:33:14,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:14,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:14,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:14,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 22:33:14,614 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:14,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:14,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1770913357, now seen corresponding path program 2 times [2024-06-27 22:33:14,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:14,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097410217] [2024-06-27 22:33:14,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:14,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:14,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:14,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:14,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097410217] [2024-06-27 22:33:14,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097410217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:14,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:14,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:33:14,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019851916] [2024-06-27 22:33:14,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:14,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:33:14,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:14,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:33:14,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:33:14,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:33:14,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 224 transitions, 3293 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:14,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:14,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:33:14,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:15,653 INFO L124 PetriNetUnfolderBase]: 3091/5284 cut-off events. [2024-06-27 22:33:15,653 INFO L125 PetriNetUnfolderBase]: For 70993/71011 co-relation queries the response was YES. [2024-06-27 22:33:15,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29107 conditions, 5284 events. 3091/5284 cut-off events. For 70993/71011 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 35825 event pairs, 694 based on Foata normal form. 15/5252 useless extension candidates. Maximal degree in co-relation 29030. Up to 4009 conditions per place. [2024-06-27 22:33:15,692 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 197 selfloop transitions, 69 changer transitions 0/277 dead transitions. [2024-06-27 22:33:15,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 277 transitions, 4237 flow [2024-06-27 22:33:15,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:33:15,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:33:15,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-27 22:33:15,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6453900709219859 [2024-06-27 22:33:15,693 INFO L175 Difference]: Start difference. First operand has 160 places, 224 transitions, 3293 flow. Second operand 6 states and 182 transitions. [2024-06-27 22:33:15,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 277 transitions, 4237 flow [2024-06-27 22:33:15,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 277 transitions, 4127 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-06-27 22:33:15,814 INFO L231 Difference]: Finished difference. Result has 165 places, 231 transitions, 3511 flow [2024-06-27 22:33:15,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3185, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3511, PETRI_PLACES=165, PETRI_TRANSITIONS=231} [2024-06-27 22:33:15,815 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 114 predicate places. [2024-06-27 22:33:15,815 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 231 transitions, 3511 flow [2024-06-27 22:33:15,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:15,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:15,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:15,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 22:33:15,815 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:15,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:15,816 INFO L85 PathProgramCache]: Analyzing trace with hash 2065596727, now seen corresponding path program 3 times [2024-06-27 22:33:15,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:15,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593111133] [2024-06-27 22:33:15,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:15,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:15,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:16,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:16,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593111133] [2024-06-27 22:33:16,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593111133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:16,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:16,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:33:16,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696818986] [2024-06-27 22:33:16,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:16,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:33:16,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:16,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:33:16,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:33:16,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:33:16,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 231 transitions, 3511 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:16,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:16,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:33:16,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:16,924 INFO L124 PetriNetUnfolderBase]: 3122/5373 cut-off events. [2024-06-27 22:33:16,924 INFO L125 PetriNetUnfolderBase]: For 77323/77338 co-relation queries the response was YES. [2024-06-27 22:33:16,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30196 conditions, 5373 events. 3122/5373 cut-off events. For 77323/77338 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 36916 event pairs, 696 based on Foata normal form. 11/5347 useless extension candidates. Maximal degree in co-relation 30116. Up to 3678 conditions per place. [2024-06-27 22:33:16,973 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 216 selfloop transitions, 74 changer transitions 0/301 dead transitions. [2024-06-27 22:33:16,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 301 transitions, 4686 flow [2024-06-27 22:33:16,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:33:16,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:33:16,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 22:33:16,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6347517730496454 [2024-06-27 22:33:16,974 INFO L175 Difference]: Start difference. First operand has 165 places, 231 transitions, 3511 flow. Second operand 6 states and 179 transitions. [2024-06-27 22:33:16,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 301 transitions, 4686 flow [2024-06-27 22:33:17,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 301 transitions, 4549 flow, removed 44 selfloop flow, removed 2 redundant places. [2024-06-27 22:33:17,128 INFO L231 Difference]: Finished difference. Result has 171 places, 248 transitions, 3849 flow [2024-06-27 22:33:17,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3374, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3849, PETRI_PLACES=171, PETRI_TRANSITIONS=248} [2024-06-27 22:33:17,129 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 120 predicate places. [2024-06-27 22:33:17,129 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 248 transitions, 3849 flow [2024-06-27 22:33:17,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:17,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:17,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:17,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 22:33:17,130 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:17,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:17,130 INFO L85 PathProgramCache]: Analyzing trace with hash 607930919, now seen corresponding path program 4 times [2024-06-27 22:33:17,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:17,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365843662] [2024-06-27 22:33:17,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:17,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:17,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:17,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:17,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:17,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365843662] [2024-06-27 22:33:17,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365843662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:17,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:17,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:33:17,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644655719] [2024-06-27 22:33:17,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:17,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:33:17,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:17,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:33:17,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:33:17,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:33:17,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 248 transitions, 3849 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:17,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:17,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:33:17,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:18,271 INFO L124 PetriNetUnfolderBase]: 3161/5380 cut-off events. [2024-06-27 22:33:18,271 INFO L125 PetriNetUnfolderBase]: For 90864/90957 co-relation queries the response was YES. [2024-06-27 22:33:18,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31792 conditions, 5380 events. 3161/5380 cut-off events. For 90864/90957 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 36589 event pairs, 790 based on Foata normal form. 40/5366 useless extension candidates. Maximal degree in co-relation 31709. Up to 3706 conditions per place. [2024-06-27 22:33:18,326 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 212 selfloop transitions, 86 changer transitions 0/309 dead transitions. [2024-06-27 22:33:18,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 309 transitions, 5131 flow [2024-06-27 22:33:18,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:33:18,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:33:18,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-27 22:33:18,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624113475177305 [2024-06-27 22:33:18,327 INFO L175 Difference]: Start difference. First operand has 171 places, 248 transitions, 3849 flow. Second operand 6 states and 176 transitions. [2024-06-27 22:33:18,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 309 transitions, 5131 flow [2024-06-27 22:33:18,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 309 transitions, 4989 flow, removed 71 selfloop flow, removed 0 redundant places. [2024-06-27 22:33:18,510 INFO L231 Difference]: Finished difference. Result has 179 places, 265 transitions, 4315 flow [2024-06-27 22:33:18,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3713, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4315, PETRI_PLACES=179, PETRI_TRANSITIONS=265} [2024-06-27 22:33:18,511 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 128 predicate places. [2024-06-27 22:33:18,511 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 265 transitions, 4315 flow [2024-06-27 22:33:18,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:18,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:18,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:18,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 22:33:18,512 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:18,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:18,512 INFO L85 PathProgramCache]: Analyzing trace with hash 870897785, now seen corresponding path program 5 times [2024-06-27 22:33:18,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:18,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689060372] [2024-06-27 22:33:18,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:18,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:18,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:18,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:18,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689060372] [2024-06-27 22:33:18,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689060372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:18,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:18,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:33:18,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351883444] [2024-06-27 22:33:18,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:18,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:33:18,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:18,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:33:18,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:33:18,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:33:18,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 265 transitions, 4315 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:18,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:18,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:33:18,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:19,712 INFO L124 PetriNetUnfolderBase]: 3158/5379 cut-off events. [2024-06-27 22:33:19,712 INFO L125 PetriNetUnfolderBase]: For 97630/97723 co-relation queries the response was YES. [2024-06-27 22:33:19,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32484 conditions, 5379 events. 3158/5379 cut-off events. For 97630/97723 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 36593 event pairs, 787 based on Foata normal form. 40/5364 useless extension candidates. Maximal degree in co-relation 32396. Up to 3704 conditions per place. [2024-06-27 22:33:19,766 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 210 selfloop transitions, 87 changer transitions 0/308 dead transitions. [2024-06-27 22:33:19,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 308 transitions, 5181 flow [2024-06-27 22:33:19,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:33:19,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:33:19,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-27 22:33:19,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6205673758865248 [2024-06-27 22:33:19,767 INFO L175 Difference]: Start difference. First operand has 179 places, 265 transitions, 4315 flow. Second operand 6 states and 175 transitions. [2024-06-27 22:33:19,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 308 transitions, 5181 flow [2024-06-27 22:33:19,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 308 transitions, 4949 flow, removed 116 selfloop flow, removed 0 redundant places. [2024-06-27 22:33:20,002 INFO L231 Difference]: Finished difference. Result has 185 places, 265 transitions, 4264 flow [2024-06-27 22:33:20,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4083, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4264, PETRI_PLACES=185, PETRI_TRANSITIONS=265} [2024-06-27 22:33:20,003 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 134 predicate places. [2024-06-27 22:33:20,003 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 265 transitions, 4264 flow [2024-06-27 22:33:20,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:20,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:20,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:20,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 22:33:20,004 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:20,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:20,004 INFO L85 PathProgramCache]: Analyzing trace with hash 2060843063, now seen corresponding path program 1 times [2024-06-27 22:33:20,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:20,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460183183] [2024-06-27 22:33:20,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:20,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:20,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:20,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:20,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:20,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460183183] [2024-06-27 22:33:20,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460183183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:20,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:20,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:33:20,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864614107] [2024-06-27 22:33:20,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:20,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:33:20,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:20,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:33:20,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:33:20,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:33:20,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 265 transitions, 4264 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:20,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:20,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:33:20,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:21,403 INFO L124 PetriNetUnfolderBase]: 3422/5894 cut-off events. [2024-06-27 22:33:21,403 INFO L125 PetriNetUnfolderBase]: For 104503/104518 co-relation queries the response was YES. [2024-06-27 22:33:21,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35355 conditions, 5894 events. 3422/5894 cut-off events. For 104503/104518 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 41298 event pairs, 876 based on Foata normal form. 14/5852 useless extension candidates. Maximal degree in co-relation 35264. Up to 4497 conditions per place. [2024-06-27 22:33:21,464 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 275 selfloop transitions, 45 changer transitions 0/331 dead transitions. [2024-06-27 22:33:21,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 331 transitions, 5368 flow [2024-06-27 22:33:21,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 22:33:21,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 22:33:21,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-27 22:33:21,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6117021276595744 [2024-06-27 22:33:21,465 INFO L175 Difference]: Start difference. First operand has 185 places, 265 transitions, 4264 flow. Second operand 8 states and 230 transitions. [2024-06-27 22:33:21,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 331 transitions, 5368 flow [2024-06-27 22:33:21,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 331 transitions, 5219 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 22:33:21,716 INFO L231 Difference]: Finished difference. Result has 191 places, 273 transitions, 4390 flow [2024-06-27 22:33:21,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4115, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4390, PETRI_PLACES=191, PETRI_TRANSITIONS=273} [2024-06-27 22:33:21,717 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 140 predicate places. [2024-06-27 22:33:21,717 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 273 transitions, 4390 flow [2024-06-27 22:33:21,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:21,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:21,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:21,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 22:33:21,718 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:21,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:21,718 INFO L85 PathProgramCache]: Analyzing trace with hash 168299831, now seen corresponding path program 2 times [2024-06-27 22:33:21,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:21,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551838116] [2024-06-27 22:33:21,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:21,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:21,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:21,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:21,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:21,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551838116] [2024-06-27 22:33:21,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551838116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:21,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:21,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:33:21,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770353293] [2024-06-27 22:33:21,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:21,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:33:21,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:21,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:33:21,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:33:21,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:33:21,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 273 transitions, 4390 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:21,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:21,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:33:21,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:23,125 INFO L124 PetriNetUnfolderBase]: 3583/6146 cut-off events. [2024-06-27 22:33:23,126 INFO L125 PetriNetUnfolderBase]: For 123807/123822 co-relation queries the response was YES. [2024-06-27 22:33:23,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37980 conditions, 6146 events. 3583/6146 cut-off events. For 123807/123822 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 43231 event pairs, 696 based on Foata normal form. 14/6126 useless extension candidates. Maximal degree in co-relation 37888. Up to 2867 conditions per place. [2024-06-27 22:33:23,176 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 245 selfloop transitions, 97 changer transitions 0/353 dead transitions. [2024-06-27 22:33:23,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 353 transitions, 5948 flow [2024-06-27 22:33:23,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:33:23,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:33:23,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-06-27 22:33:23,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6504559270516718 [2024-06-27 22:33:23,178 INFO L175 Difference]: Start difference. First operand has 191 places, 273 transitions, 4390 flow. Second operand 7 states and 214 transitions. [2024-06-27 22:33:23,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 353 transitions, 5948 flow [2024-06-27 22:33:23,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 353 transitions, 5810 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-27 22:33:23,427 INFO L231 Difference]: Finished difference. Result has 197 places, 282 transitions, 4776 flow [2024-06-27 22:33:23,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4252, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4776, PETRI_PLACES=197, PETRI_TRANSITIONS=282} [2024-06-27 22:33:23,428 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 146 predicate places. [2024-06-27 22:33:23,428 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 282 transitions, 4776 flow [2024-06-27 22:33:23,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:23,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:23,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:23,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 22:33:23,428 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:23,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:23,429 INFO L85 PathProgramCache]: Analyzing trace with hash 12252229, now seen corresponding path program 1 times [2024-06-27 22:33:23,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:23,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704983326] [2024-06-27 22:33:23,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:23,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:23,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:23,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:23,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704983326] [2024-06-27 22:33:23,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704983326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:23,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:23,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:33:23,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940141903] [2024-06-27 22:33:23,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:23,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:33:23,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:23,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:33:23,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:33:23,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:33:23,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 282 transitions, 4776 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:23,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:23,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:33:23,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:24,803 INFO L124 PetriNetUnfolderBase]: 3629/6230 cut-off events. [2024-06-27 22:33:24,803 INFO L125 PetriNetUnfolderBase]: For 137864/137864 co-relation queries the response was YES. [2024-06-27 22:33:24,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39577 conditions, 6230 events. 3629/6230 cut-off events. For 137864/137864 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 43990 event pairs, 829 based on Foata normal form. 2/6172 useless extension candidates. Maximal degree in co-relation 39481. Up to 4833 conditions per place. [2024-06-27 22:33:24,868 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 282 selfloop transitions, 48 changer transitions 0/341 dead transitions. [2024-06-27 22:33:24,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 341 transitions, 5872 flow [2024-06-27 22:33:24,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:33:24,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:33:24,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-27 22:33:24,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6322188449848024 [2024-06-27 22:33:24,869 INFO L175 Difference]: Start difference. First operand has 197 places, 282 transitions, 4776 flow. Second operand 7 states and 208 transitions. [2024-06-27 22:33:24,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 341 transitions, 5872 flow [2024-06-27 22:33:25,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 341 transitions, 5642 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-27 22:33:25,184 INFO L231 Difference]: Finished difference. Result has 201 places, 284 transitions, 4676 flow [2024-06-27 22:33:25,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4546, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4676, PETRI_PLACES=201, PETRI_TRANSITIONS=284} [2024-06-27 22:33:25,184 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 150 predicate places. [2024-06-27 22:33:25,184 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 284 transitions, 4676 flow [2024-06-27 22:33:25,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:25,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:25,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:25,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 22:33:25,185 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:25,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:25,185 INFO L85 PathProgramCache]: Analyzing trace with hash 172941647, now seen corresponding path program 2 times [2024-06-27 22:33:25,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:25,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916373038] [2024-06-27 22:33:25,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:25,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:25,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:25,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:25,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:25,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916373038] [2024-06-27 22:33:25,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916373038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:25,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:25,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:33:25,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686713226] [2024-06-27 22:33:25,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:25,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:33:25,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:25,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:33:25,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:33:25,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:33:25,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 284 transitions, 4676 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:25,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:25,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:33:25,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:26,553 INFO L124 PetriNetUnfolderBase]: 3675/6279 cut-off events. [2024-06-27 22:33:26,553 INFO L125 PetriNetUnfolderBase]: For 131322/131322 co-relation queries the response was YES. [2024-06-27 22:33:26,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38893 conditions, 6279 events. 3675/6279 cut-off events. For 131322/131322 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 44222 event pairs, 836 based on Foata normal form. 2/6210 useless extension candidates. Maximal degree in co-relation 38796. Up to 4871 conditions per place. [2024-06-27 22:33:26,622 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 280 selfloop transitions, 47 changer transitions 0/338 dead transitions. [2024-06-27 22:33:26,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 338 transitions, 5758 flow [2024-06-27 22:33:26,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:33:26,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:33:26,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-27 22:33:26,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6200607902735562 [2024-06-27 22:33:26,623 INFO L175 Difference]: Start difference. First operand has 201 places, 284 transitions, 4676 flow. Second operand 7 states and 204 transitions. [2024-06-27 22:33:26,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 338 transitions, 5758 flow [2024-06-27 22:33:26,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 338 transitions, 5656 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 22:33:26,926 INFO L231 Difference]: Finished difference. Result has 203 places, 286 transitions, 4706 flow [2024-06-27 22:33:26,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4578, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4706, PETRI_PLACES=203, PETRI_TRANSITIONS=286} [2024-06-27 22:33:26,927 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 152 predicate places. [2024-06-27 22:33:26,927 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 286 transitions, 4706 flow [2024-06-27 22:33:26,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:26,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:26,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:26,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 22:33:26,928 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:26,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:26,928 INFO L85 PathProgramCache]: Analyzing trace with hash 172941461, now seen corresponding path program 3 times [2024-06-27 22:33:26,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:26,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599731282] [2024-06-27 22:33:26,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:26,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:26,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:27,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:27,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599731282] [2024-06-27 22:33:27,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599731282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:27,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:27,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:33:27,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105153859] [2024-06-27 22:33:27,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:27,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:33:27,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:27,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:33:27,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:33:27,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:33:27,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 286 transitions, 4706 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:27,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:27,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:33:27,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:28,331 INFO L124 PetriNetUnfolderBase]: 3780/6461 cut-off events. [2024-06-27 22:33:28,332 INFO L125 PetriNetUnfolderBase]: For 143266/143281 co-relation queries the response was YES. [2024-06-27 22:33:28,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40375 conditions, 6461 events. 3780/6461 cut-off events. For 143266/143281 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 45610 event pairs, 745 based on Foata normal form. 14/6430 useless extension candidates. Maximal degree in co-relation 40277. Up to 2894 conditions per place. [2024-06-27 22:33:28,397 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 248 selfloop transitions, 99 changer transitions 0/358 dead transitions. [2024-06-27 22:33:28,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 358 transitions, 6204 flow [2024-06-27 22:33:28,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:33:28,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:33:28,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-06-27 22:33:28,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-06-27 22:33:28,398 INFO L175 Difference]: Start difference. First operand has 203 places, 286 transitions, 4706 flow. Second operand 7 states and 210 transitions. [2024-06-27 22:33:28,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 358 transitions, 6204 flow [2024-06-27 22:33:28,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 358 transitions, 6108 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 22:33:28,706 INFO L231 Difference]: Finished difference. Result has 206 places, 293 transitions, 5048 flow [2024-06-27 22:33:28,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4610, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5048, PETRI_PLACES=206, PETRI_TRANSITIONS=293} [2024-06-27 22:33:28,706 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 155 predicate places. [2024-06-27 22:33:28,707 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 293 transitions, 5048 flow [2024-06-27 22:33:28,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:28,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:28,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:28,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 22:33:28,707 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:28,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:28,708 INFO L85 PathProgramCache]: Analyzing trace with hash 172948157, now seen corresponding path program 3 times [2024-06-27 22:33:28,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:28,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782280274] [2024-06-27 22:33:28,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:28,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:28,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:28,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:28,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:28,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782280274] [2024-06-27 22:33:28,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782280274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:28,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:28,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:33:28,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154341731] [2024-06-27 22:33:28,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:28,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:33:28,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:28,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:33:28,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:33:28,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:33:28,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 293 transitions, 5048 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:28,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:28,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:33:28,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:30,217 INFO L124 PetriNetUnfolderBase]: 3826/6552 cut-off events. [2024-06-27 22:33:30,217 INFO L125 PetriNetUnfolderBase]: For 155315/155315 co-relation queries the response was YES. [2024-06-27 22:33:30,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42100 conditions, 6552 events. 3826/6552 cut-off events. For 155315/155315 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 46607 event pairs, 834 based on Foata normal form. 2/6493 useless extension candidates. Maximal degree in co-relation 42000. Up to 5057 conditions per place. [2024-06-27 22:33:30,286 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 295 selfloop transitions, 51 changer transitions 0/357 dead transitions. [2024-06-27 22:33:30,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 357 transitions, 6324 flow [2024-06-27 22:33:30,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 22:33:30,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 22:33:30,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-27 22:33:30,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6143617021276596 [2024-06-27 22:33:30,287 INFO L175 Difference]: Start difference. First operand has 206 places, 293 transitions, 5048 flow. Second operand 8 states and 231 transitions. [2024-06-27 22:33:30,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 357 transitions, 6324 flow [2024-06-27 22:33:30,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 357 transitions, 6108 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-27 22:33:30,637 INFO L231 Difference]: Finished difference. Result has 211 places, 295 transitions, 4972 flow [2024-06-27 22:33:30,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4832, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4972, PETRI_PLACES=211, PETRI_TRANSITIONS=295} [2024-06-27 22:33:30,637 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 160 predicate places. [2024-06-27 22:33:30,637 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 295 transitions, 4972 flow [2024-06-27 22:33:30,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:30,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:30,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:30,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 22:33:30,638 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:30,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:30,638 INFO L85 PathProgramCache]: Analyzing trace with hash -494572425, now seen corresponding path program 4 times [2024-06-27 22:33:30,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:30,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957710796] [2024-06-27 22:33:30,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:30,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:30,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:30,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:30,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:30,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957710796] [2024-06-27 22:33:30,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957710796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:30,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:30,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:33:30,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750917765] [2024-06-27 22:33:30,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:30,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:33:30,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:30,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:33:30,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:33:30,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:33:30,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 295 transitions, 4972 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:30,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:30,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:33:30,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:32,137 INFO L124 PetriNetUnfolderBase]: 3853/6517 cut-off events. [2024-06-27 22:33:32,137 INFO L125 PetriNetUnfolderBase]: For 159714/159778 co-relation queries the response was YES. [2024-06-27 22:33:32,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41616 conditions, 6517 events. 3853/6517 cut-off events. For 159714/159778 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 45705 event pairs, 958 based on Foata normal form. 29/6489 useless extension candidates. Maximal degree in co-relation 41515. Up to 2903 conditions per place. [2024-06-27 22:33:32,203 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 237 selfloop transitions, 113 changer transitions 0/361 dead transitions. [2024-06-27 22:33:32,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 361 transitions, 6478 flow [2024-06-27 22:33:32,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:33:32,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:33:32,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-27 22:33:32,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6261398176291794 [2024-06-27 22:33:32,205 INFO L175 Difference]: Start difference. First operand has 211 places, 295 transitions, 4972 flow. Second operand 7 states and 206 transitions. [2024-06-27 22:33:32,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 361 transitions, 6478 flow [2024-06-27 22:33:32,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 361 transitions, 6393 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 22:33:32,560 INFO L231 Difference]: Finished difference. Result has 213 places, 302 transitions, 5380 flow [2024-06-27 22:33:32,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4893, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5380, PETRI_PLACES=213, PETRI_TRANSITIONS=302} [2024-06-27 22:33:32,561 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 162 predicate places. [2024-06-27 22:33:32,561 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 302 transitions, 5380 flow [2024-06-27 22:33:32,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:32,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:32,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:32,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 22:33:32,562 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:32,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:32,562 INFO L85 PathProgramCache]: Analyzing trace with hash 823327041, now seen corresponding path program 4 times [2024-06-27 22:33:32,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:32,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30318401] [2024-06-27 22:33:32,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:32,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:32,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:32,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:32,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:32,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30318401] [2024-06-27 22:33:32,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30318401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:32,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:32,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:33:32,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781312442] [2024-06-27 22:33:32,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:32,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:33:32,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:32,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:33:32,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:33:32,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:33:32,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 302 transitions, 5380 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:32,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:32,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:33:32,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:34,175 INFO L124 PetriNetUnfolderBase]: 3900/6673 cut-off events. [2024-06-27 22:33:34,175 INFO L125 PetriNetUnfolderBase]: For 161017/161026 co-relation queries the response was YES. [2024-06-27 22:33:34,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43144 conditions, 6673 events. 3900/6673 cut-off events. For 161017/161026 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 47479 event pairs, 798 based on Foata normal form. 8/6615 useless extension candidates. Maximal degree in co-relation 43042. Up to 5141 conditions per place. [2024-06-27 22:33:34,249 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 276 selfloop transitions, 64 changer transitions 0/351 dead transitions. [2024-06-27 22:33:34,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 351 transitions, 6468 flow [2024-06-27 22:33:34,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:33:34,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:33:34,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-27 22:33:34,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624113475177305 [2024-06-27 22:33:34,251 INFO L175 Difference]: Start difference. First operand has 213 places, 302 transitions, 5380 flow. Second operand 6 states and 176 transitions. [2024-06-27 22:33:34,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 351 transitions, 6468 flow [2024-06-27 22:33:34,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 351 transitions, 6222 flow, removed 61 selfloop flow, removed 3 redundant places. [2024-06-27 22:33:34,663 INFO L231 Difference]: Finished difference. Result has 216 places, 312 transitions, 5521 flow [2024-06-27 22:33:34,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5134, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5521, PETRI_PLACES=216, PETRI_TRANSITIONS=312} [2024-06-27 22:33:34,664 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 165 predicate places. [2024-06-27 22:33:34,664 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 312 transitions, 5521 flow [2024-06-27 22:33:34,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:34,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:34,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:34,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 22:33:34,664 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:34,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:34,665 INFO L85 PathProgramCache]: Analyzing trace with hash 613988942, now seen corresponding path program 1 times [2024-06-27 22:33:34,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:34,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885775144] [2024-06-27 22:33:34,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:34,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:34,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:34,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:34,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:34,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885775144] [2024-06-27 22:33:34,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885775144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:34,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:34,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:33:34,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446636942] [2024-06-27 22:33:34,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:34,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:33:34,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:34,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:33:34,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:33:34,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:33:34,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 312 transitions, 5521 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:34,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:34,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:33:34,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:36,275 INFO L124 PetriNetUnfolderBase]: 4169/7079 cut-off events. [2024-06-27 22:33:36,275 INFO L125 PetriNetUnfolderBase]: For 175624/175624 co-relation queries the response was YES. [2024-06-27 22:33:36,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45963 conditions, 7079 events. 4169/7079 cut-off events. For 175624/175624 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 50577 event pairs, 667 based on Foata normal form. 2/7014 useless extension candidates. Maximal degree in co-relation 45859. Up to 4662 conditions per place. [2024-06-27 22:33:36,339 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 284 selfloop transitions, 81 changer transitions 0/376 dead transitions. [2024-06-27 22:33:36,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 376 transitions, 6961 flow [2024-06-27 22:33:36,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:33:36,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:33:36,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-27 22:33:36,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6524822695035462 [2024-06-27 22:33:36,340 INFO L175 Difference]: Start difference. First operand has 216 places, 312 transitions, 5521 flow. Second operand 6 states and 184 transitions. [2024-06-27 22:33:36,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 376 transitions, 6961 flow [2024-06-27 22:33:36,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 376 transitions, 6802 flow, removed 74 selfloop flow, removed 1 redundant places. [2024-06-27 22:33:36,763 INFO L231 Difference]: Finished difference. Result has 222 places, 330 transitions, 6035 flow [2024-06-27 22:33:36,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5362, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6035, PETRI_PLACES=222, PETRI_TRANSITIONS=330} [2024-06-27 22:33:36,764 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 171 predicate places. [2024-06-27 22:33:36,764 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 330 transitions, 6035 flow [2024-06-27 22:33:36,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:36,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:36,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:36,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 22:33:36,765 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:36,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:36,765 INFO L85 PathProgramCache]: Analyzing trace with hash -2146431316, now seen corresponding path program 2 times [2024-06-27 22:33:36,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:36,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494704149] [2024-06-27 22:33:36,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:36,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:36,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:36,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:36,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:36,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494704149] [2024-06-27 22:33:36,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494704149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:36,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:36,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:33:36,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698051463] [2024-06-27 22:33:36,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:36,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:33:36,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:36,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:33:36,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:33:36,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:33:36,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 330 transitions, 6035 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:36,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:36,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:33:36,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:38,280 INFO L124 PetriNetUnfolderBase]: 4177/7091 cut-off events. [2024-06-27 22:33:38,280 INFO L125 PetriNetUnfolderBase]: For 183484/183484 co-relation queries the response was YES. [2024-06-27 22:33:38,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47301 conditions, 7091 events. 4177/7091 cut-off events. For 183484/183484 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 50636 event pairs, 645 based on Foata normal form. 2/7028 useless extension candidates. Maximal degree in co-relation 47193. Up to 4666 conditions per place. [2024-06-27 22:33:38,357 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 278 selfloop transitions, 106 changer transitions 0/395 dead transitions. [2024-06-27 22:33:38,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 395 transitions, 7319 flow [2024-06-27 22:33:38,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 22:33:38,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 22:33:38,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-06-27 22:33:38,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6329787234042553 [2024-06-27 22:33:38,359 INFO L175 Difference]: Start difference. First operand has 222 places, 330 transitions, 6035 flow. Second operand 8 states and 238 transitions. [2024-06-27 22:33:38,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 395 transitions, 7319 flow [2024-06-27 22:33:38,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 395 transitions, 7141 flow, removed 72 selfloop flow, removed 2 redundant places. [2024-06-27 22:33:38,843 INFO L231 Difference]: Finished difference. Result has 228 places, 335 transitions, 6253 flow [2024-06-27 22:33:38,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5857, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6253, PETRI_PLACES=228, PETRI_TRANSITIONS=335} [2024-06-27 22:33:38,844 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 177 predicate places. [2024-06-27 22:33:38,844 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 335 transitions, 6253 flow [2024-06-27 22:33:38,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:38,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:38,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:38,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 22:33:38,845 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:38,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:38,846 INFO L85 PathProgramCache]: Analyzing trace with hash 928899032, now seen corresponding path program 3 times [2024-06-27 22:33:38,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:38,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459334782] [2024-06-27 22:33:38,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:38,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:38,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:38,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:38,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:38,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459334782] [2024-06-27 22:33:38,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459334782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:38,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:38,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:33:38,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549385419] [2024-06-27 22:33:38,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:38,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:33:38,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:38,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:33:38,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:33:38,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:33:38,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 335 transitions, 6253 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:38,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:38,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:33:38,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:40,431 INFO L124 PetriNetUnfolderBase]: 4339/7377 cut-off events. [2024-06-27 22:33:40,431 INFO L125 PetriNetUnfolderBase]: For 208583/208583 co-relation queries the response was YES. [2024-06-27 22:33:40,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50657 conditions, 7377 events. 4339/7377 cut-off events. For 208583/208583 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 53161 event pairs, 695 based on Foata normal form. 2/7313 useless extension candidates. Maximal degree in co-relation 50547. Up to 4542 conditions per place. [2024-06-27 22:33:40,520 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 312 selfloop transitions, 86 changer transitions 0/409 dead transitions. [2024-06-27 22:33:40,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 409 transitions, 7815 flow [2024-06-27 22:33:40,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 22:33:40,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 22:33:40,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 241 transitions. [2024-06-27 22:33:40,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6409574468085106 [2024-06-27 22:33:40,521 INFO L175 Difference]: Start difference. First operand has 228 places, 335 transitions, 6253 flow. Second operand 8 states and 241 transitions. [2024-06-27 22:33:40,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 409 transitions, 7815 flow [2024-06-27 22:33:41,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 409 transitions, 7556 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-27 22:33:41,099 INFO L231 Difference]: Finished difference. Result has 233 places, 340 transitions, 6378 flow [2024-06-27 22:33:41,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5994, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6378, PETRI_PLACES=233, PETRI_TRANSITIONS=340} [2024-06-27 22:33:41,099 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 182 predicate places. [2024-06-27 22:33:41,099 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 340 transitions, 6378 flow [2024-06-27 22:33:41,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:41,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:41,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:41,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 22:33:41,100 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:41,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:41,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1060004802, now seen corresponding path program 1 times [2024-06-27 22:33:41,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:41,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094196421] [2024-06-27 22:33:41,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:41,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:41,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:41,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:41,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094196421] [2024-06-27 22:33:41,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094196421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:41,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:41,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:33:41,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000687316] [2024-06-27 22:33:41,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:41,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:33:41,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:41,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:33:41,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:33:41,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:33:41,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 340 transitions, 6378 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:41,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:41,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:33:41,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:42,797 INFO L124 PetriNetUnfolderBase]: 4473/7581 cut-off events. [2024-06-27 22:33:42,797 INFO L125 PetriNetUnfolderBase]: For 224160/224166 co-relation queries the response was YES. [2024-06-27 22:33:42,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52440 conditions, 7581 events. 4473/7581 cut-off events. For 224160/224166 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 54440 event pairs, 839 based on Foata normal form. 7/7518 useless extension candidates. Maximal degree in co-relation 52328. Up to 5429 conditions per place. [2024-06-27 22:33:42,889 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 312 selfloop transitions, 115 changer transitions 0/438 dead transitions. [2024-06-27 22:33:42,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 438 transitions, 8225 flow [2024-06-27 22:33:42,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 22:33:42,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 22:33:42,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 272 transitions. [2024-06-27 22:33:42,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6430260047281324 [2024-06-27 22:33:42,891 INFO L175 Difference]: Start difference. First operand has 233 places, 340 transitions, 6378 flow. Second operand 9 states and 272 transitions. [2024-06-27 22:33:42,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 438 transitions, 8225 flow [2024-06-27 22:33:43,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 438 transitions, 7999 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-27 22:33:43,424 INFO L231 Difference]: Finished difference. Result has 239 places, 353 transitions, 6697 flow [2024-06-27 22:33:43,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6152, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6697, PETRI_PLACES=239, PETRI_TRANSITIONS=353} [2024-06-27 22:33:43,424 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 188 predicate places. [2024-06-27 22:33:43,424 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 353 transitions, 6697 flow [2024-06-27 22:33:43,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:43,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:43,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:43,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 22:33:43,425 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:43,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:43,425 INFO L85 PathProgramCache]: Analyzing trace with hash 729608805, now seen corresponding path program 1 times [2024-06-27 22:33:43,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:43,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837976334] [2024-06-27 22:33:43,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:43,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:43,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:43,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:43,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:43,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837976334] [2024-06-27 22:33:43,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837976334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:43,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:43,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:33:43,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716482977] [2024-06-27 22:33:43,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:43,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:33:43,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:43,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:33:43,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:33:43,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:33:43,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 353 transitions, 6697 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:43,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:43,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:33:43,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:45,257 INFO L124 PetriNetUnfolderBase]: 4540/7695 cut-off events. [2024-06-27 22:33:45,257 INFO L125 PetriNetUnfolderBase]: For 235214/235229 co-relation queries the response was YES. [2024-06-27 22:33:45,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53771 conditions, 7695 events. 4540/7695 cut-off events. For 235214/235229 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 55346 event pairs, 844 based on Foata normal form. 14/7641 useless extension candidates. Maximal degree in co-relation 53657. Up to 5951 conditions per place. [2024-06-27 22:33:45,343 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 315 selfloop transitions, 98 changer transitions 0/424 dead transitions. [2024-06-27 22:33:45,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 424 transitions, 8201 flow [2024-06-27 22:33:45,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 22:33:45,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 22:33:45,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-27 22:33:45,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6143617021276596 [2024-06-27 22:33:45,344 INFO L175 Difference]: Start difference. First operand has 239 places, 353 transitions, 6697 flow. Second operand 8 states and 231 transitions. [2024-06-27 22:33:45,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 424 transitions, 8201 flow [2024-06-27 22:33:45,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 424 transitions, 8001 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-27 22:33:45,951 INFO L231 Difference]: Finished difference. Result has 245 places, 362 transitions, 6989 flow [2024-06-27 22:33:45,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6503, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6989, PETRI_PLACES=245, PETRI_TRANSITIONS=362} [2024-06-27 22:33:45,952 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 194 predicate places. [2024-06-27 22:33:45,952 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 362 transitions, 6989 flow [2024-06-27 22:33:45,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:45,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:45,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:45,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 22:33:45,952 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:45,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:45,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1408927564, now seen corresponding path program 4 times [2024-06-27 22:33:45,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:45,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131974292] [2024-06-27 22:33:45,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:45,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:45,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:46,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:46,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131974292] [2024-06-27 22:33:46,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131974292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:46,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:46,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:33:46,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640290460] [2024-06-27 22:33:46,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:46,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:33:46,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:46,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:33:46,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:33:46,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:33:46,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 362 transitions, 6989 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:46,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:46,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:33:46,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:47,701 INFO L124 PetriNetUnfolderBase]: 4578/7741 cut-off events. [2024-06-27 22:33:47,701 INFO L125 PetriNetUnfolderBase]: For 246909/246909 co-relation queries the response was YES. [2024-06-27 22:33:47,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54898 conditions, 7741 events. 4578/7741 cut-off events. For 246909/246909 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 55625 event pairs, 674 based on Foata normal form. 2/7677 useless extension candidates. Maximal degree in co-relation 54781. Up to 4797 conditions per place. [2024-06-27 22:33:47,793 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 313 selfloop transitions, 102 changer transitions 0/426 dead transitions. [2024-06-27 22:33:47,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 426 transitions, 8334 flow [2024-06-27 22:33:47,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 22:33:47,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 22:33:47,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-06-27 22:33:47,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6276595744680851 [2024-06-27 22:33:47,794 INFO L175 Difference]: Start difference. First operand has 245 places, 362 transitions, 6989 flow. Second operand 8 states and 236 transitions. [2024-06-27 22:33:47,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 426 transitions, 8334 flow [2024-06-27 22:33:48,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 426 transitions, 8217 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-27 22:33:48,429 INFO L231 Difference]: Finished difference. Result has 250 places, 365 transitions, 7224 flow [2024-06-27 22:33:48,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6874, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7224, PETRI_PLACES=250, PETRI_TRANSITIONS=365} [2024-06-27 22:33:48,430 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 199 predicate places. [2024-06-27 22:33:48,430 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 365 transitions, 7224 flow [2024-06-27 22:33:48,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:48,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:48,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:48,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 22:33:48,430 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:48,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:48,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1059999222, now seen corresponding path program 2 times [2024-06-27 22:33:48,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:48,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850561340] [2024-06-27 22:33:48,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:48,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:48,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:48,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:48,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:48,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850561340] [2024-06-27 22:33:48,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850561340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:48,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:48,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:33:48,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707254216] [2024-06-27 22:33:48,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:48,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:33:48,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:48,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:33:48,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:33:48,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:33:48,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 365 transitions, 7224 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:48,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:48,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:33:48,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:50,269 INFO L124 PetriNetUnfolderBase]: 4575/7769 cut-off events. [2024-06-27 22:33:50,269 INFO L125 PetriNetUnfolderBase]: For 251807/251813 co-relation queries the response was YES. [2024-06-27 22:33:50,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55669 conditions, 7769 events. 4575/7769 cut-off events. For 251807/251813 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 56066 event pairs, 876 based on Foata normal form. 7/7703 useless extension candidates. Maximal degree in co-relation 55550. Up to 5536 conditions per place. [2024-06-27 22:33:50,359 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 307 selfloop transitions, 117 changer transitions 0/435 dead transitions. [2024-06-27 22:33:50,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 435 transitions, 8666 flow [2024-06-27 22:33:50,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 22:33:50,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 22:33:50,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 241 transitions. [2024-06-27 22:33:50,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6409574468085106 [2024-06-27 22:33:50,361 INFO L175 Difference]: Start difference. First operand has 250 places, 365 transitions, 7224 flow. Second operand 8 states and 241 transitions. [2024-06-27 22:33:50,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 435 transitions, 8666 flow [2024-06-27 22:33:50,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 435 transitions, 8405 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-27 22:33:50,993 INFO L231 Difference]: Finished difference. Result has 253 places, 367 transitions, 7292 flow [2024-06-27 22:33:50,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6963, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7292, PETRI_PLACES=253, PETRI_TRANSITIONS=367} [2024-06-27 22:33:50,994 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 202 predicate places. [2024-06-27 22:33:50,994 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 367 transitions, 7292 flow [2024-06-27 22:33:50,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:50,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:50,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:50,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 22:33:50,994 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:50,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:50,995 INFO L85 PathProgramCache]: Analyzing trace with hash 936262245, now seen corresponding path program 2 times [2024-06-27 22:33:50,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:50,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783784887] [2024-06-27 22:33:50,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:50,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:51,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:51,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:51,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783784887] [2024-06-27 22:33:51,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783784887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:51,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:51,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:33:51,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242968740] [2024-06-27 22:33:51,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:51,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:33:51,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:51,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:33:51,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:33:51,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:33:51,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 367 transitions, 7292 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:51,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:51,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:33:51,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:53,128 INFO L124 PetriNetUnfolderBase]: 4634/7854 cut-off events. [2024-06-27 22:33:53,129 INFO L125 PetriNetUnfolderBase]: For 255777/255792 co-relation queries the response was YES. [2024-06-27 22:33:53,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56274 conditions, 7854 events. 4634/7854 cut-off events. For 255777/255792 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 56634 event pairs, 885 based on Foata normal form. 12/7795 useless extension candidates. Maximal degree in co-relation 56154. Up to 6051 conditions per place. [2024-06-27 22:33:53,236 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 317 selfloop transitions, 105 changer transitions 0/433 dead transitions. [2024-06-27 22:33:53,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 433 transitions, 8712 flow [2024-06-27 22:33:53,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 22:33:53,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 22:33:53,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-27 22:33:53,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6143617021276596 [2024-06-27 22:33:53,238 INFO L175 Difference]: Start difference. First operand has 253 places, 367 transitions, 7292 flow. Second operand 8 states and 231 transitions. [2024-06-27 22:33:53,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 433 transitions, 8712 flow [2024-06-27 22:33:53,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 433 transitions, 8506 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 22:33:53,943 INFO L231 Difference]: Finished difference. Result has 256 places, 371 transitions, 7426 flow [2024-06-27 22:33:53,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7087, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7426, PETRI_PLACES=256, PETRI_TRANSITIONS=371} [2024-06-27 22:33:53,944 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 205 predicate places. [2024-06-27 22:33:53,944 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 371 transitions, 7426 flow [2024-06-27 22:33:53,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:53,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:53,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:53,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 22:33:53,945 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:53,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:53,945 INFO L85 PathProgramCache]: Analyzing trace with hash -889778482, now seen corresponding path program 5 times [2024-06-27 22:33:53,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:53,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736463463] [2024-06-27 22:33:53,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:53,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:54,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:54,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:54,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736463463] [2024-06-27 22:33:54,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736463463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:54,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:54,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:33:54,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506729024] [2024-06-27 22:33:54,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:54,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:33:54,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:54,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:33:54,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:33:54,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:33:54,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 371 transitions, 7426 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:54,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:54,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:33:54,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:55,858 INFO L124 PetriNetUnfolderBase]: 4642/7831 cut-off events. [2024-06-27 22:33:55,858 INFO L125 PetriNetUnfolderBase]: For 261196/261202 co-relation queries the response was YES. [2024-06-27 22:33:55,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56471 conditions, 7831 events. 4642/7831 cut-off events. For 261196/261202 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 56345 event pairs, 720 based on Foata normal form. 6/7773 useless extension candidates. Maximal degree in co-relation 56350. Up to 4835 conditions per place. [2024-06-27 22:33:55,944 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 302 selfloop transitions, 109 changer transitions 0/422 dead transitions. [2024-06-27 22:33:55,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 422 transitions, 8740 flow [2024-06-27 22:33:55,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:33:55,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:33:55,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-27 22:33:55,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6261398176291794 [2024-06-27 22:33:55,945 INFO L175 Difference]: Start difference. First operand has 256 places, 371 transitions, 7426 flow. Second operand 7 states and 206 transitions. [2024-06-27 22:33:55,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 422 transitions, 8740 flow [2024-06-27 22:33:56,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 422 transitions, 8546 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 22:33:56,640 INFO L231 Difference]: Finished difference. Result has 257 places, 374 transitions, 7604 flow [2024-06-27 22:33:56,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7236, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7604, PETRI_PLACES=257, PETRI_TRANSITIONS=374} [2024-06-27 22:33:56,641 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 206 predicate places. [2024-06-27 22:33:56,641 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 374 transitions, 7604 flow [2024-06-27 22:33:56,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:56,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:56,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:56,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 22:33:56,642 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:56,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:56,642 INFO L85 PathProgramCache]: Analyzing trace with hash 936262028, now seen corresponding path program 3 times [2024-06-27 22:33:56,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:56,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288606516] [2024-06-27 22:33:56,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:56,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:56,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:56,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:56,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:56,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288606516] [2024-06-27 22:33:56,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288606516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:56,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:56,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:33:56,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605155246] [2024-06-27 22:33:56,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:56,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:33:56,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:56,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:33:56,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:33:56,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:33:56,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 374 transitions, 7604 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:56,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:56,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:33:56,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:33:58,408 INFO L124 PetriNetUnfolderBase]: 4639/7869 cut-off events. [2024-06-27 22:33:58,409 INFO L125 PetriNetUnfolderBase]: For 263906/263915 co-relation queries the response was YES. [2024-06-27 22:33:58,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56714 conditions, 7869 events. 4639/7869 cut-off events. For 263906/263915 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 56834 event pairs, 836 based on Foata normal form. 9/7810 useless extension candidates. Maximal degree in co-relation 56594. Up to 5584 conditions per place. [2024-06-27 22:33:58,508 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 296 selfloop transitions, 122 changer transitions 0/429 dead transitions. [2024-06-27 22:33:58,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 429 transitions, 8926 flow [2024-06-27 22:33:58,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:33:58,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:33:58,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-27 22:33:58,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413373860182371 [2024-06-27 22:33:58,510 INFO L175 Difference]: Start difference. First operand has 257 places, 374 transitions, 7604 flow. Second operand 7 states and 211 transitions. [2024-06-27 22:33:58,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 429 transitions, 8926 flow [2024-06-27 22:33:59,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 429 transitions, 8667 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-27 22:33:59,312 INFO L231 Difference]: Finished difference. Result has 260 places, 376 transitions, 7685 flow [2024-06-27 22:33:59,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7345, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7685, PETRI_PLACES=260, PETRI_TRANSITIONS=376} [2024-06-27 22:33:59,313 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 209 predicate places. [2024-06-27 22:33:59,313 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 376 transitions, 7685 flow [2024-06-27 22:33:59,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:59,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:33:59,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:33:59,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 22:33:59,314 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:33:59,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:33:59,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1212858439, now seen corresponding path program 3 times [2024-06-27 22:33:59,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:33:59,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260274923] [2024-06-27 22:33:59,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:33:59,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:33:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:33:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:33:59,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:33:59,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260274923] [2024-06-27 22:33:59,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260274923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:33:59,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:33:59,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:33:59,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935557833] [2024-06-27 22:33:59,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:33:59,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:33:59,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:33:59,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:33:59,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:33:59,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:33:59,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 376 transitions, 7685 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:33:59,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:33:59,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:33:59,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:34:01,309 INFO L124 PetriNetUnfolderBase]: 4686/7903 cut-off events. [2024-06-27 22:34:01,309 INFO L125 PetriNetUnfolderBase]: For 263472/263478 co-relation queries the response was YES. [2024-06-27 22:34:01,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57027 conditions, 7903 events. 4686/7903 cut-off events. For 263472/263478 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 56678 event pairs, 836 based on Foata normal form. 8/7847 useless extension candidates. Maximal degree in co-relation 56906. Up to 6174 conditions per place. [2024-06-27 22:34:01,408 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 337 selfloop transitions, 111 changer transitions 0/459 dead transitions. [2024-06-27 22:34:01,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 459 transitions, 9396 flow [2024-06-27 22:34:01,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 22:34:01,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 22:34:01,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 260 transitions. [2024-06-27 22:34:01,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146572104018913 [2024-06-27 22:34:01,410 INFO L175 Difference]: Start difference. First operand has 260 places, 376 transitions, 7685 flow. Second operand 9 states and 260 transitions. [2024-06-27 22:34:01,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 459 transitions, 9396 flow [2024-06-27 22:34:02,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 459 transitions, 9163 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-27 22:34:02,248 INFO L231 Difference]: Finished difference. Result has 266 places, 394 transitions, 8339 flow [2024-06-27 22:34:02,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7465, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8339, PETRI_PLACES=266, PETRI_TRANSITIONS=394} [2024-06-27 22:34:02,249 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 215 predicate places. [2024-06-27 22:34:02,249 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 394 transitions, 8339 flow [2024-06-27 22:34:02,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:34:02,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:34:02,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:34:02,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 22:34:02,249 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:34:02,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:34:02,250 INFO L85 PathProgramCache]: Analyzing trace with hash 379805714, now seen corresponding path program 4 times [2024-06-27 22:34:02,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:34:02,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110356348] [2024-06-27 22:34:02,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:34:02,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:34:02,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:34:02,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:34:02,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:34:02,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110356348] [2024-06-27 22:34:02,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110356348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:34:02,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:34:02,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:34:02,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445955721] [2024-06-27 22:34:02,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:34:02,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:34:02,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:34:02,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:34:02,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:34:02,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:34:02,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 394 transitions, 8339 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:34:02,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:34:02,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:34:02,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:34:04,218 INFO L124 PetriNetUnfolderBase]: 4688/7963 cut-off events. [2024-06-27 22:34:04,218 INFO L125 PetriNetUnfolderBase]: For 278956/278971 co-relation queries the response was YES. [2024-06-27 22:34:04,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57330 conditions, 7963 events. 4688/7963 cut-off events. For 278956/278971 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 57714 event pairs, 894 based on Foata normal form. 11/7907 useless extension candidates. Maximal degree in co-relation 57207. Up to 4903 conditions per place. [2024-06-27 22:34:04,321 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 304 selfloop transitions, 149 changer transitions 0/464 dead transitions. [2024-06-27 22:34:04,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 464 transitions, 10039 flow [2024-06-27 22:34:04,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:34:04,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:34:04,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-27 22:34:04,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6443768996960486 [2024-06-27 22:34:04,322 INFO L175 Difference]: Start difference. First operand has 266 places, 394 transitions, 8339 flow. Second operand 7 states and 212 transitions. [2024-06-27 22:34:04,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 464 transitions, 10039 flow [2024-06-27 22:34:05,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 464 transitions, 9719 flow, removed 99 selfloop flow, removed 4 redundant places. [2024-06-27 22:34:05,326 INFO L231 Difference]: Finished difference. Result has 270 places, 403 transitions, 8616 flow [2024-06-27 22:34:05,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8019, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8616, PETRI_PLACES=270, PETRI_TRANSITIONS=403} [2024-06-27 22:34:05,326 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 219 predicate places. [2024-06-27 22:34:05,327 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 403 transitions, 8616 flow [2024-06-27 22:34:05,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:34:05,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:34:05,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:34:05,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 22:34:05,327 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:34:05,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:34:05,327 INFO L85 PathProgramCache]: Analyzing trace with hash 523459094, now seen corresponding path program 5 times [2024-06-27 22:34:05,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:34:05,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110376118] [2024-06-27 22:34:05,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:34:05,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:34:05,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:34:05,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:34:05,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:34:05,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110376118] [2024-06-27 22:34:05,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110376118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:34:05,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:34:05,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:34:05,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200992273] [2024-06-27 22:34:05,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:34:05,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:34:05,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:34:05,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:34:05,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:34:05,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:34:05,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 403 transitions, 8616 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:34:05,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:34:05,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:34:05,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:34:07,305 INFO L124 PetriNetUnfolderBase]: 4719/8006 cut-off events. [2024-06-27 22:34:07,305 INFO L125 PetriNetUnfolderBase]: For 281059/281074 co-relation queries the response was YES. [2024-06-27 22:34:07,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58925 conditions, 8006 events. 4719/8006 cut-off events. For 281059/281074 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 58048 event pairs, 884 based on Foata normal form. 11/7958 useless extension candidates. Maximal degree in co-relation 58799. Up to 4925 conditions per place. [2024-06-27 22:34:07,408 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 308 selfloop transitions, 146 changer transitions 0/465 dead transitions. [2024-06-27 22:34:07,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 465 transitions, 10202 flow [2024-06-27 22:34:07,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:34:07,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:34:07,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-27 22:34:07,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6322188449848024 [2024-06-27 22:34:07,409 INFO L175 Difference]: Start difference. First operand has 270 places, 403 transitions, 8616 flow. Second operand 7 states and 208 transitions. [2024-06-27 22:34:07,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 465 transitions, 10202 flow [2024-06-27 22:34:08,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 465 transitions, 9821 flow, removed 132 selfloop flow, removed 2 redundant places. [2024-06-27 22:34:08,387 INFO L231 Difference]: Finished difference. Result has 275 places, 410 transitions, 8724 flow [2024-06-27 22:34:08,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8267, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8724, PETRI_PLACES=275, PETRI_TRANSITIONS=410} [2024-06-27 22:34:08,387 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 224 predicate places. [2024-06-27 22:34:08,387 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 410 transitions, 8724 flow [2024-06-27 22:34:08,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:34:08,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:34:08,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:34:08,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 22:34:08,388 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:34:08,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:34:08,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1065973443, now seen corresponding path program 4 times [2024-06-27 22:34:08,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:34:08,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61596963] [2024-06-27 22:34:08,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:34:08,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:34:08,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:34:08,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:34:08,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:34:08,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61596963] [2024-06-27 22:34:08,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61596963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:34:08,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:34:08,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:34:08,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875736163] [2024-06-27 22:34:08,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:34:08,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:34:08,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:34:08,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:34:08,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:34:08,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:34:08,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 410 transitions, 8724 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:34:08,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:34:08,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:34:08,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:34:10,476 INFO L124 PetriNetUnfolderBase]: 4757/8040 cut-off events. [2024-06-27 22:34:10,476 INFO L125 PetriNetUnfolderBase]: For 267993/268008 co-relation queries the response was YES. [2024-06-27 22:34:10,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59156 conditions, 8040 events. 4757/8040 cut-off events. For 267993/268008 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 57954 event pairs, 913 based on Foata normal form. 12/7990 useless extension candidates. Maximal degree in co-relation 59028. Up to 5833 conditions per place. [2024-06-27 22:34:10,572 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 335 selfloop transitions, 116 changer transitions 0/462 dead transitions. [2024-06-27 22:34:10,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 462 transitions, 10085 flow [2024-06-27 22:34:10,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:34:10,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:34:10,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-27 22:34:10,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6418439716312057 [2024-06-27 22:34:10,573 INFO L175 Difference]: Start difference. First operand has 275 places, 410 transitions, 8724 flow. Second operand 6 states and 181 transitions. [2024-06-27 22:34:10,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 462 transitions, 10085 flow [2024-06-27 22:34:11,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 462 transitions, 9869 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-06-27 22:34:11,620 INFO L231 Difference]: Finished difference. Result has 279 places, 413 transitions, 8875 flow [2024-06-27 22:34:11,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8509, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8875, PETRI_PLACES=279, PETRI_TRANSITIONS=413} [2024-06-27 22:34:11,620 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 228 predicate places. [2024-06-27 22:34:11,620 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 413 transitions, 8875 flow [2024-06-27 22:34:11,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:34:11,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:34:11,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:34:11,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 22:34:11,621 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:34:11,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:34:11,621 INFO L85 PathProgramCache]: Analyzing trace with hash 523458908, now seen corresponding path program 6 times [2024-06-27 22:34:11,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:34:11,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011180822] [2024-06-27 22:34:11,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:34:11,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:34:11,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:34:11,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:34:11,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:34:11,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011180822] [2024-06-27 22:34:11,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011180822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:34:11,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:34:11,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:34:11,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730717620] [2024-06-27 22:34:11,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:34:11,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:34:11,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:34:11,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:34:11,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:34:11,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:34:11,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 413 transitions, 8875 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:34:11,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:34:11,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:34:11,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:34:13,672 INFO L124 PetriNetUnfolderBase]: 4808/8096 cut-off events. [2024-06-27 22:34:13,672 INFO L125 PetriNetUnfolderBase]: For 284222/284226 co-relation queries the response was YES. [2024-06-27 22:34:13,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60205 conditions, 8096 events. 4808/8096 cut-off events. For 284222/284226 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 58341 event pairs, 882 based on Foata normal form. 3/8035 useless extension candidates. Maximal degree in co-relation 60076. Up to 3829 conditions per place. [2024-06-27 22:34:13,768 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 324 selfloop transitions, 133 changer transitions 0/468 dead transitions. [2024-06-27 22:34:13,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 468 transitions, 10425 flow [2024-06-27 22:34:13,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:34:13,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:34:13,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-27 22:34:13,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6109422492401215 [2024-06-27 22:34:13,769 INFO L175 Difference]: Start difference. First operand has 279 places, 413 transitions, 8875 flow. Second operand 7 states and 201 transitions. [2024-06-27 22:34:13,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 468 transitions, 10425 flow [2024-06-27 22:34:14,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 468 transitions, 10216 flow, removed 49 selfloop flow, removed 2 redundant places. [2024-06-27 22:34:14,685 INFO L231 Difference]: Finished difference. Result has 286 places, 419 transitions, 9343 flow [2024-06-27 22:34:14,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8666, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9343, PETRI_PLACES=286, PETRI_TRANSITIONS=419} [2024-06-27 22:34:14,685 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 235 predicate places. [2024-06-27 22:34:14,685 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 419 transitions, 9343 flow [2024-06-27 22:34:14,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:34:14,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:34:14,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:34:14,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 22:34:14,686 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:34:14,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:34:14,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1066210376, now seen corresponding path program 6 times [2024-06-27 22:34:14,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:34:14,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099551358] [2024-06-27 22:34:14,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:34:14,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:34:14,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:34:14,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:34:14,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:34:14,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099551358] [2024-06-27 22:34:14,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099551358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:34:14,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:34:14,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:34:14,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261109781] [2024-06-27 22:34:14,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:34:14,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:34:14,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:34:14,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:34:14,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:34:14,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:34:14,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 419 transitions, 9343 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:34:14,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:34:14,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:34:14,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:34:16,801 INFO L124 PetriNetUnfolderBase]: 4802/8140 cut-off events. [2024-06-27 22:34:16,802 INFO L125 PetriNetUnfolderBase]: For 301820/301835 co-relation queries the response was YES. [2024-06-27 22:34:16,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61856 conditions, 8140 events. 4802/8140 cut-off events. For 301820/301835 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 59101 event pairs, 890 based on Foata normal form. 11/8084 useless extension candidates. Maximal degree in co-relation 61724. Up to 5007 conditions per place. [2024-06-27 22:34:16,898 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 313 selfloop transitions, 149 changer transitions 0/473 dead transitions. [2024-06-27 22:34:16,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 473 transitions, 10675 flow [2024-06-27 22:34:16,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:34:16,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:34:16,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-27 22:34:16,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291793313069909 [2024-06-27 22:34:16,899 INFO L175 Difference]: Start difference. First operand has 286 places, 419 transitions, 9343 flow. Second operand 7 states and 207 transitions. [2024-06-27 22:34:16,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 473 transitions, 10675 flow [2024-06-27 22:34:18,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 473 transitions, 10225 flow, removed 126 selfloop flow, removed 4 redundant places. [2024-06-27 22:34:18,014 INFO L231 Difference]: Finished difference. Result has 289 places, 419 transitions, 9198 flow [2024-06-27 22:34:18,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8893, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9198, PETRI_PLACES=289, PETRI_TRANSITIONS=419} [2024-06-27 22:34:18,015 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 238 predicate places. [2024-06-27 22:34:18,015 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 419 transitions, 9198 flow [2024-06-27 22:34:18,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:34:18,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:34:18,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:34:18,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 22:34:18,015 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:34:18,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:34:18,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1670747534, now seen corresponding path program 7 times [2024-06-27 22:34:18,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:34:18,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609967970] [2024-06-27 22:34:18,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:34:18,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:34:18,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:34:18,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:34:18,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:34:18,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609967970] [2024-06-27 22:34:18,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609967970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:34:18,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:34:18,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:34:18,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594624514] [2024-06-27 22:34:18,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:34:18,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:34:18,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:34:18,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:34:18,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:34:18,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:34:18,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 419 transitions, 9198 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:34:18,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:34:18,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:34:18,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:34:20,232 INFO L124 PetriNetUnfolderBase]: 4909/8221 cut-off events. [2024-06-27 22:34:20,232 INFO L125 PetriNetUnfolderBase]: For 336695/336755 co-relation queries the response was YES. [2024-06-27 22:34:20,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63150 conditions, 8221 events. 4909/8221 cut-off events. For 336695/336755 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 59259 event pairs, 1115 based on Foata normal form. 24/8165 useless extension candidates. Maximal degree in co-relation 63017. Up to 3866 conditions per place. [2024-06-27 22:34:20,340 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 316 selfloop transitions, 148 changer transitions 0/475 dead transitions. [2024-06-27 22:34:20,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 475 transitions, 11182 flow [2024-06-27 22:34:20,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:34:20,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:34:20,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-27 22:34:20,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60790273556231 [2024-06-27 22:34:20,341 INFO L175 Difference]: Start difference. First operand has 289 places, 419 transitions, 9198 flow. Second operand 7 states and 200 transitions. [2024-06-27 22:34:20,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 475 transitions, 11182 flow [2024-06-27 22:34:21,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 475 transitions, 10940 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 22:34:21,444 INFO L231 Difference]: Finished difference. Result has 290 places, 432 transitions, 9922 flow [2024-06-27 22:34:21,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8956, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9922, PETRI_PLACES=290, PETRI_TRANSITIONS=432} [2024-06-27 22:34:21,445 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 239 predicate places. [2024-06-27 22:34:21,445 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 432 transitions, 9922 flow [2024-06-27 22:34:21,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:34:21,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:34:21,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:34:21,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 22:34:21,446 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:34:21,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:34:21,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1914301930, now seen corresponding path program 7 times [2024-06-27 22:34:21,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:34:21,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65572483] [2024-06-27 22:34:21,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:34:21,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:34:21,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:34:21,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:34:21,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:34:21,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65572483] [2024-06-27 22:34:21,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65572483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:34:21,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:34:21,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:34:21,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866153142] [2024-06-27 22:34:21,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:34:21,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:34:21,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:34:21,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:34:21,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:34:21,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:34:21,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 432 transitions, 9922 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:34:21,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:34:21,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:34:21,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:34:23,656 INFO L124 PetriNetUnfolderBase]: 4940/8323 cut-off events. [2024-06-27 22:34:23,656 INFO L125 PetriNetUnfolderBase]: For 344851/344919 co-relation queries the response was YES. [2024-06-27 22:34:23,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64257 conditions, 8323 events. 4940/8323 cut-off events. For 344851/344919 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 60424 event pairs, 1095 based on Foata normal form. 30/8271 useless extension candidates. Maximal degree in co-relation 64123. Up to 5182 conditions per place. [2024-06-27 22:34:23,784 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 313 selfloop transitions, 165 changer transitions 0/489 dead transitions. [2024-06-27 22:34:23,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 489 transitions, 11613 flow [2024-06-27 22:34:23,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:34:23,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:34:23,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-27 22:34:23,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6200607902735562 [2024-06-27 22:34:23,785 INFO L175 Difference]: Start difference. First operand has 290 places, 432 transitions, 9922 flow. Second operand 7 states and 204 transitions. [2024-06-27 22:34:23,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 489 transitions, 11613 flow [2024-06-27 22:34:25,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 489 transitions, 11315 flow, removed 149 selfloop flow, removed 0 redundant places. [2024-06-27 22:34:25,163 INFO L231 Difference]: Finished difference. Result has 297 places, 439 transitions, 10148 flow [2024-06-27 22:34:25,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=9640, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10148, PETRI_PLACES=297, PETRI_TRANSITIONS=439} [2024-06-27 22:34:25,164 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 246 predicate places. [2024-06-27 22:34:25,164 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 439 transitions, 10148 flow [2024-06-27 22:34:25,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:34:25,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:34:25,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:34:25,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 22:34:25,165 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:34:25,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:34:25,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1450527957, now seen corresponding path program 5 times [2024-06-27 22:34:25,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:34:25,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749651127] [2024-06-27 22:34:25,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:34:25,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:34:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:34:25,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:34:25,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:34:25,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749651127] [2024-06-27 22:34:25,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749651127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:34:25,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:34:25,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:34:25,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864654223] [2024-06-27 22:34:25,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:34:25,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:34:25,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:34:25,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:34:25,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:34:25,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:34:25,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 439 transitions, 10148 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:34:25,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:34:25,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:34:25,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:34:27,392 INFO L124 PetriNetUnfolderBase]: 4991/8403 cut-off events. [2024-06-27 22:34:27,392 INFO L125 PetriNetUnfolderBase]: For 316589/316660 co-relation queries the response was YES. [2024-06-27 22:34:27,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64599 conditions, 8403 events. 4991/8403 cut-off events. For 316589/316660 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 60785 event pairs, 843 based on Foata normal form. 33/8369 useless extension candidates. Maximal degree in co-relation 64462. Up to 6136 conditions per place. [2024-06-27 22:34:27,514 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 347 selfloop transitions, 132 changer transitions 0/490 dead transitions. [2024-06-27 22:34:27,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 490 transitions, 11629 flow [2024-06-27 22:34:27,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:34:27,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:34:27,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-27 22:34:27,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6312056737588653 [2024-06-27 22:34:27,515 INFO L175 Difference]: Start difference. First operand has 297 places, 439 transitions, 10148 flow. Second operand 6 states and 178 transitions. [2024-06-27 22:34:27,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 490 transitions, 11629 flow [2024-06-27 22:34:29,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 490 transitions, 11437 flow, removed 49 selfloop flow, removed 2 redundant places. [2024-06-27 22:34:29,016 INFO L231 Difference]: Finished difference. Result has 302 places, 448 transitions, 10565 flow [2024-06-27 22:34:29,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=9959, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10565, PETRI_PLACES=302, PETRI_TRANSITIONS=448} [2024-06-27 22:34:29,017 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 251 predicate places. [2024-06-27 22:34:29,017 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 448 transitions, 10565 flow [2024-06-27 22:34:29,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:34:29,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:34:29,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:34:29,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 22:34:29,018 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:34:29,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:34:29,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1946587649, now seen corresponding path program 6 times [2024-06-27 22:34:29,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:34:29,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044129980] [2024-06-27 22:34:29,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:34:29,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:34:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:34:29,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:34:29,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:34:29,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044129980] [2024-06-27 22:34:29,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044129980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:34:29,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:34:29,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:34:29,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77217652] [2024-06-27 22:34:29,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:34:29,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:34:29,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:34:29,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:34:29,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:34:29,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:34:29,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 448 transitions, 10565 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:34:29,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:34:29,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:34:29,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:34:31,317 INFO L124 PetriNetUnfolderBase]: 5028/8474 cut-off events. [2024-06-27 22:34:31,317 INFO L125 PetriNetUnfolderBase]: For 329808/329879 co-relation queries the response was YES. [2024-06-27 22:34:31,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65338 conditions, 8474 events. 5028/8474 cut-off events. For 329808/329879 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 61477 event pairs, 863 based on Foata normal form. 33/8439 useless extension candidates. Maximal degree in co-relation 65198. Up to 6168 conditions per place. [2024-06-27 22:34:31,446 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 364 selfloop transitions, 119 changer transitions 0/494 dead transitions. [2024-06-27 22:34:31,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 494 transitions, 11806 flow [2024-06-27 22:34:31,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:34:31,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:34:31,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-27 22:34:31,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6205673758865248 [2024-06-27 22:34:31,456 INFO L175 Difference]: Start difference. First operand has 302 places, 448 transitions, 10565 flow. Second operand 6 states and 175 transitions. [2024-06-27 22:34:31,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 494 transitions, 11806 flow [2024-06-27 22:34:32,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 494 transitions, 11534 flow, removed 103 selfloop flow, removed 1 redundant places. [2024-06-27 22:34:32,887 INFO L231 Difference]: Finished difference. Result has 307 places, 452 transitions, 10658 flow [2024-06-27 22:34:32,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=10301, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10658, PETRI_PLACES=307, PETRI_TRANSITIONS=452} [2024-06-27 22:34:32,887 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 256 predicate places. [2024-06-27 22:34:32,887 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 452 transitions, 10658 flow [2024-06-27 22:34:32,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:34:32,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:34:32,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:34:32,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 22:34:32,888 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:34:32,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:34:32,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1566258792, now seen corresponding path program 8 times [2024-06-27 22:34:32,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:34:32,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354601006] [2024-06-27 22:34:32,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:34:32,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:34:32,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:34:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:34:33,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:34:33,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354601006] [2024-06-27 22:34:33,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354601006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:34:33,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:34:33,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:34:33,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446105113] [2024-06-27 22:34:33,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:34:33,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:34:33,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:34:33,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:34:33,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:34:33,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:34:33,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 452 transitions, 10658 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:34:33,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:34:33,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:34:33,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:34:35,072 INFO L124 PetriNetUnfolderBase]: 5023/8415 cut-off events. [2024-06-27 22:34:35,072 INFO L125 PetriNetUnfolderBase]: For 322804/322808 co-relation queries the response was YES. [2024-06-27 22:34:35,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64901 conditions, 8415 events. 5023/8415 cut-off events. For 322804/322808 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 60782 event pairs, 920 based on Foata normal form. 3/8341 useless extension candidates. Maximal degree in co-relation 64759. Up to 6191 conditions per place. [2024-06-27 22:34:35,189 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 413 selfloop transitions, 69 changer transitions 0/493 dead transitions. [2024-06-27 22:34:35,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 493 transitions, 11780 flow [2024-06-27 22:34:35,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:34:35,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:34:35,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-27 22:34:35,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5866261398176292 [2024-06-27 22:34:35,190 INFO L175 Difference]: Start difference. First operand has 307 places, 452 transitions, 10658 flow. Second operand 7 states and 193 transitions. [2024-06-27 22:34:35,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 493 transitions, 11780 flow [2024-06-27 22:34:36,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 493 transitions, 11448 flow, removed 92 selfloop flow, removed 4 redundant places. [2024-06-27 22:34:36,688 INFO L231 Difference]: Finished difference. Result has 310 places, 452 transitions, 10480 flow [2024-06-27 22:34:36,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=10336, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10480, PETRI_PLACES=310, PETRI_TRANSITIONS=452} [2024-06-27 22:34:36,688 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 259 predicate places. [2024-06-27 22:34:36,688 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 452 transitions, 10480 flow [2024-06-27 22:34:36,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:34:36,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:34:36,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:34:36,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 22:34:36,689 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:34:36,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:34:36,689 INFO L85 PathProgramCache]: Analyzing trace with hash 2091433450, now seen corresponding path program 8 times [2024-06-27 22:34:36,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:34:36,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644239079] [2024-06-27 22:34:36,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:34:36,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:34:36,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:34:36,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:34:36,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:34:36,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644239079] [2024-06-27 22:34:36,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644239079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:34:36,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:34:36,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:34:36,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294806417] [2024-06-27 22:34:36,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:34:36,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:34:36,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:34:36,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:34:36,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:34:36,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:34:36,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 452 transitions, 10480 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:34:36,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:34:36,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:34:36,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:34:38,944 INFO L124 PetriNetUnfolderBase]: 5046/8515 cut-off events. [2024-06-27 22:34:38,944 INFO L125 PetriNetUnfolderBase]: For 341938/342006 co-relation queries the response was YES. [2024-06-27 22:34:39,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64279 conditions, 8515 events. 5046/8515 cut-off events. For 341938/342006 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 62180 event pairs, 1110 based on Foata normal form. 30/8469 useless extension candidates. Maximal degree in co-relation 64137. Up to 5229 conditions per place. [2024-06-27 22:34:39,058 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 320 selfloop transitions, 172 changer transitions 0/503 dead transitions. [2024-06-27 22:34:39,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 503 transitions, 12038 flow [2024-06-27 22:34:39,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:34:39,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:34:39,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-27 22:34:39,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6231003039513677 [2024-06-27 22:34:39,060 INFO L175 Difference]: Start difference. First operand has 310 places, 452 transitions, 10480 flow. Second operand 7 states and 205 transitions. [2024-06-27 22:34:39,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 503 transitions, 12038 flow [2024-06-27 22:34:40,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 503 transitions, 11820 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 22:34:40,288 INFO L231 Difference]: Finished difference. Result has 310 places, 456 transitions, 10722 flow [2024-06-27 22:34:40,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=10262, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10722, PETRI_PLACES=310, PETRI_TRANSITIONS=456} [2024-06-27 22:34:40,288 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 259 predicate places. [2024-06-27 22:34:40,288 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 456 transitions, 10722 flow [2024-06-27 22:34:40,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:34:40,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:34:40,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:34:40,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 22:34:40,289 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:34:40,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:34:40,289 INFO L85 PathProgramCache]: Analyzing trace with hash 2091433264, now seen corresponding path program 9 times [2024-06-27 22:34:40,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:34:40,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208660100] [2024-06-27 22:34:40,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:34:40,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:34:40,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:34:40,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:34:40,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:34:40,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208660100] [2024-06-27 22:34:40,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208660100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:34:40,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:34:40,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:34:40,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827311242] [2024-06-27 22:34:40,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:34:40,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:34:40,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:34:40,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:34:40,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:34:40,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:34:40,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 456 transitions, 10722 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:34:40,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:34:40,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:34:40,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:34:42,609 INFO L124 PetriNetUnfolderBase]: 5041/8453 cut-off events. [2024-06-27 22:34:42,609 INFO L125 PetriNetUnfolderBase]: For 349452/349512 co-relation queries the response was YES. [2024-06-27 22:34:42,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64477 conditions, 8453 events. 5041/8453 cut-off events. For 349452/349512 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 61184 event pairs, 1156 based on Foata normal form. 24/8394 useless extension candidates. Maximal degree in co-relation 64334. Up to 3973 conditions per place. [2024-06-27 22:34:42,705 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 330 selfloop transitions, 155 changer transitions 0/496 dead transitions. [2024-06-27 22:34:42,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 496 transitions, 11896 flow [2024-06-27 22:34:42,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:34:42,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:34:42,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-27 22:34:42,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5987841945288754 [2024-06-27 22:34:42,707 INFO L175 Difference]: Start difference. First operand has 310 places, 456 transitions, 10722 flow. Second operand 7 states and 197 transitions. [2024-06-27 22:34:42,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 496 transitions, 11896 flow [2024-06-27 22:34:43,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 496 transitions, 11398 flow, removed 81 selfloop flow, removed 4 redundant places. [2024-06-27 22:34:43,792 INFO L231 Difference]: Finished difference. Result has 313 places, 456 transitions, 10540 flow [2024-06-27 22:34:43,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=10224, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10540, PETRI_PLACES=313, PETRI_TRANSITIONS=456} [2024-06-27 22:34:43,793 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 262 predicate places. [2024-06-27 22:34:43,793 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 456 transitions, 10540 flow [2024-06-27 22:34:43,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:34:43,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:34:43,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:34:43,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 22:34:43,794 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:34:43,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:34:43,794 INFO L85 PathProgramCache]: Analyzing trace with hash 2091670600, now seen corresponding path program 9 times [2024-06-27 22:34:43,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:34:43,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797504655] [2024-06-27 22:34:43,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:34:43,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:34:43,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:34:43,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:34:43,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:34:43,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797504655] [2024-06-27 22:34:43,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797504655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:34:43,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:34:43,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:34:43,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010633906] [2024-06-27 22:34:43,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:34:43,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:34:43,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:34:43,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:34:43,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:34:43,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:34:43,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 456 transitions, 10540 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:34:43,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:34:43,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:34:43,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:34:45,928 INFO L124 PetriNetUnfolderBase]: 5035/8472 cut-off events. [2024-06-27 22:34:45,928 INFO L125 PetriNetUnfolderBase]: For 343583/343651 co-relation queries the response was YES. [2024-06-27 22:34:46,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64174 conditions, 8472 events. 5035/8472 cut-off events. For 343583/343651 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 61524 event pairs, 1134 based on Foata normal form. 30/8420 useless extension candidates. Maximal degree in co-relation 64030. Up to 5215 conditions per place. [2024-06-27 22:34:46,049 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 316 selfloop transitions, 175 changer transitions 0/502 dead transitions. [2024-06-27 22:34:46,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 502 transitions, 11881 flow [2024-06-27 22:34:46,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:34:46,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:34:46,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-27 22:34:46,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6170212765957447 [2024-06-27 22:34:46,050 INFO L175 Difference]: Start difference. First operand has 313 places, 456 transitions, 10540 flow. Second operand 7 states and 203 transitions. [2024-06-27 22:34:46,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 502 transitions, 11881 flow [2024-06-27 22:34:47,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 502 transitions, 11415 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-27 22:34:47,606 INFO L231 Difference]: Finished difference. Result has 313 places, 456 transitions, 10431 flow [2024-06-27 22:34:47,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=10074, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10431, PETRI_PLACES=313, PETRI_TRANSITIONS=456} [2024-06-27 22:34:47,606 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 262 predicate places. [2024-06-27 22:34:47,607 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 456 transitions, 10431 flow [2024-06-27 22:34:47,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:34:47,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:34:47,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:34:47,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 22:34:47,607 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:34:47,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:34:47,607 INFO L85 PathProgramCache]: Analyzing trace with hash -2088981613, now seen corresponding path program 1 times [2024-06-27 22:34:47,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:34:47,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150652151] [2024-06-27 22:34:47,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:34:47,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:34:47,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:34:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:34:47,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:34:47,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150652151] [2024-06-27 22:34:47,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150652151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:34:47,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:34:47,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:34:47,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504058611] [2024-06-27 22:34:47,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:34:47,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:34:47,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:34:47,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:34:47,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:34:47,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:34:47,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 456 transitions, 10431 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:34:47,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:34:47,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:34:47,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:34:49,937 INFO L124 PetriNetUnfolderBase]: 5072/8555 cut-off events. [2024-06-27 22:34:49,937 INFO L125 PetriNetUnfolderBase]: For 311595/311610 co-relation queries the response was YES. [2024-06-27 22:34:50,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63459 conditions, 8555 events. 5072/8555 cut-off events. For 311595/311610 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 62278 event pairs, 866 based on Foata normal form. 18/8520 useless extension candidates. Maximal degree in co-relation 63316. Up to 6699 conditions per place. [2024-06-27 22:34:50,069 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 448 selfloop transitions, 69 changer transitions 0/528 dead transitions. [2024-06-27 22:34:50,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 528 transitions, 11896 flow [2024-06-27 22:34:50,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 22:34:50,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 22:34:50,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-06-27 22:34:50,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6276595744680851 [2024-06-27 22:34:50,070 INFO L175 Difference]: Start difference. First operand has 313 places, 456 transitions, 10431 flow. Second operand 8 states and 236 transitions. [2024-06-27 22:34:50,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 528 transitions, 11896 flow [2024-06-27 22:34:51,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 528 transitions, 11536 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 22:34:51,542 INFO L231 Difference]: Finished difference. Result has 316 places, 462 transitions, 10345 flow [2024-06-27 22:34:51,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=10071, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10345, PETRI_PLACES=316, PETRI_TRANSITIONS=462} [2024-06-27 22:34:51,543 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 265 predicate places. [2024-06-27 22:34:51,543 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 462 transitions, 10345 flow [2024-06-27 22:34:51,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:34:51,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:34:51,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:34:51,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 22:34:51,543 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:34:51,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:34:51,544 INFO L85 PathProgramCache]: Analyzing trace with hash 922328929, now seen corresponding path program 2 times [2024-06-27 22:34:51,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:34:51,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988472129] [2024-06-27 22:34:51,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:34:51,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:34:51,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:34:51,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:34:51,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:34:51,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988472129] [2024-06-27 22:34:51,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988472129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:34:51,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:34:51,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:34:51,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759035046] [2024-06-27 22:34:51,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:34:51,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:34:51,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:34:51,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:34:51,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:34:51,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:34:51,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 462 transitions, 10345 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:34:51,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:34:51,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:34:51,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:34:54,071 INFO L124 PetriNetUnfolderBase]: 5390/9106 cut-off events. [2024-06-27 22:34:54,072 INFO L125 PetriNetUnfolderBase]: For 346683/346698 co-relation queries the response was YES. [2024-06-27 22:34:54,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66961 conditions, 9106 events. 5390/9106 cut-off events. For 346683/346698 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 67309 event pairs, 868 based on Foata normal form. 18/9058 useless extension candidates. Maximal degree in co-relation 66816. Up to 4072 conditions per place. [2024-06-27 22:34:54,215 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 359 selfloop transitions, 167 changer transitions 0/537 dead transitions. [2024-06-27 22:34:54,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 537 transitions, 12276 flow [2024-06-27 22:34:54,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:34:54,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:34:54,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 215 transitions. [2024-06-27 22:34:54,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6534954407294833 [2024-06-27 22:34:54,216 INFO L175 Difference]: Start difference. First operand has 316 places, 462 transitions, 10345 flow. Second operand 7 states and 215 transitions. [2024-06-27 22:34:54,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 537 transitions, 12276 flow [2024-06-27 22:34:55,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 537 transitions, 12009 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-27 22:34:55,661 INFO L231 Difference]: Finished difference. Result has 320 places, 472 transitions, 10780 flow [2024-06-27 22:34:55,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=10086, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10780, PETRI_PLACES=320, PETRI_TRANSITIONS=472} [2024-06-27 22:34:55,662 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 269 predicate places. [2024-06-27 22:34:55,662 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 472 transitions, 10780 flow [2024-06-27 22:34:55,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:34:55,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:34:55,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:34:55,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 22:34:55,662 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:34:55,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:34:55,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1066426849, now seen corresponding path program 3 times [2024-06-27 22:34:55,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:34:55,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35651961] [2024-06-27 22:34:55,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:34:55,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:34:55,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:34:55,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:34:55,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:34:55,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35651961] [2024-06-27 22:34:55,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35651961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:34:55,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:34:55,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:34:55,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911603362] [2024-06-27 22:34:55,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:34:55,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:34:55,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:34:55,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:34:55,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:34:55,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:34:55,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 472 transitions, 10780 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:34:55,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:34:55,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:34:55,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:34:58,311 INFO L124 PetriNetUnfolderBase]: 5750/9756 cut-off events. [2024-06-27 22:34:58,311 INFO L125 PetriNetUnfolderBase]: For 395250/395265 co-relation queries the response was YES. [2024-06-27 22:34:58,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72960 conditions, 9756 events. 5750/9756 cut-off events. For 395250/395265 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 73529 event pairs, 879 based on Foata normal form. 18/9697 useless extension candidates. Maximal degree in co-relation 72813. Up to 4192 conditions per place. [2024-06-27 22:34:58,462 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 390 selfloop transitions, 149 changer transitions 0/550 dead transitions. [2024-06-27 22:34:58,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 550 transitions, 13093 flow [2024-06-27 22:34:58,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:34:58,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:34:58,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-27 22:34:58,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6474164133738601 [2024-06-27 22:34:58,463 INFO L175 Difference]: Start difference. First operand has 320 places, 472 transitions, 10780 flow. Second operand 7 states and 213 transitions. [2024-06-27 22:34:58,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 550 transitions, 13093 flow [2024-06-27 22:35:00,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 550 transitions, 12762 flow, removed 59 selfloop flow, removed 3 redundant places. [2024-06-27 22:35:00,116 INFO L231 Difference]: Finished difference. Result has 325 places, 480 transitions, 10975 flow [2024-06-27 22:35:00,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=10455, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10975, PETRI_PLACES=325, PETRI_TRANSITIONS=480} [2024-06-27 22:35:00,117 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 274 predicate places. [2024-06-27 22:35:00,117 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 480 transitions, 10975 flow [2024-06-27 22:35:00,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:35:00,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:35:00,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:35:00,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 22:35:00,117 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:35:00,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:35:00,118 INFO L85 PathProgramCache]: Analyzing trace with hash 2104833373, now seen corresponding path program 4 times [2024-06-27 22:35:00,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:35:00,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933715284] [2024-06-27 22:35:00,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:35:00,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:35:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:35:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:35:00,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:35:00,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933715284] [2024-06-27 22:35:00,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933715284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:35:00,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:35:00,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:35:00,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665753610] [2024-06-27 22:35:00,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:35:00,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:35:00,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:35:00,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:35:00,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:35:00,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:35:00,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 480 transitions, 10975 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:35:00,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:35:00,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:35:00,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:35:02,792 INFO L124 PetriNetUnfolderBase]: 6396/11002 cut-off events. [2024-06-27 22:35:02,792 INFO L125 PetriNetUnfolderBase]: For 435633/435648 co-relation queries the response was YES. [2024-06-27 22:35:02,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79643 conditions, 11002 events. 6396/11002 cut-off events. For 435633/435648 co-relation queries the response was YES. Maximal size of possible extension queue 748. Compared 85724 event pairs, 1077 based on Foata normal form. 18/10953 useless extension candidates. Maximal degree in co-relation 79494. Up to 4394 conditions per place. [2024-06-27 22:35:02,955 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 344 selfloop transitions, 205 changer transitions 0/560 dead transitions. [2024-06-27 22:35:02,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 560 transitions, 12956 flow [2024-06-27 22:35:02,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:35:02,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:35:02,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-06-27 22:35:02,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6773049645390071 [2024-06-27 22:35:02,956 INFO L175 Difference]: Start difference. First operand has 325 places, 480 transitions, 10975 flow. Second operand 6 states and 191 transitions. [2024-06-27 22:35:02,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 560 transitions, 12956 flow [2024-06-27 22:35:04,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 560 transitions, 12779 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-27 22:35:04,625 INFO L231 Difference]: Finished difference. Result has 329 places, 502 transitions, 11761 flow [2024-06-27 22:35:04,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=10817, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11761, PETRI_PLACES=329, PETRI_TRANSITIONS=502} [2024-06-27 22:35:04,626 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 278 predicate places. [2024-06-27 22:35:04,626 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 502 transitions, 11761 flow [2024-06-27 22:35:04,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:35:04,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:35:04,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:35:04,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 22:35:04,626 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:35:04,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:35:04,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1848125473, now seen corresponding path program 5 times [2024-06-27 22:35:04,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:35:04,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121691119] [2024-06-27 22:35:04,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:35:04,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:35:04,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:35:04,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:35:04,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:35:04,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121691119] [2024-06-27 22:35:04,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121691119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:35:04,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:35:04,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:35:04,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102429587] [2024-06-27 22:35:04,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:35:04,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:35:04,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:35:04,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:35:04,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:35:04,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:35:04,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 502 transitions, 11761 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:35:04,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:35:04,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:35:04,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:35:07,637 INFO L124 PetriNetUnfolderBase]: 6592/11324 cut-off events. [2024-06-27 22:35:07,637 INFO L125 PetriNetUnfolderBase]: For 459384/459464 co-relation queries the response was YES. [2024-06-27 22:35:07,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82939 conditions, 11324 events. 6592/11324 cut-off events. For 459384/459464 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 88824 event pairs, 1060 based on Foata normal form. 37/11243 useless extension candidates. Maximal degree in co-relation 82789. Up to 4462 conditions per place. [2024-06-27 22:35:07,819 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 352 selfloop transitions, 214 changer transitions 0/577 dead transitions. [2024-06-27 22:35:07,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 577 transitions, 14060 flow [2024-06-27 22:35:07,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:35:07,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:35:07,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-06-27 22:35:07,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6352583586626139 [2024-06-27 22:35:07,820 INFO L175 Difference]: Start difference. First operand has 329 places, 502 transitions, 11761 flow. Second operand 7 states and 209 transitions. [2024-06-27 22:35:07,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 577 transitions, 14060 flow [2024-06-27 22:35:09,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 577 transitions, 13506 flow, removed 162 selfloop flow, removed 3 redundant places. [2024-06-27 22:35:09,921 INFO L231 Difference]: Finished difference. Result has 334 places, 516 transitions, 12289 flow [2024-06-27 22:35:09,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=11327, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12289, PETRI_PLACES=334, PETRI_TRANSITIONS=516} [2024-06-27 22:35:09,922 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 283 predicate places. [2024-06-27 22:35:09,922 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 516 transitions, 12289 flow [2024-06-27 22:35:09,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:35:09,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:35:09,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:35:09,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 22:35:09,923 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:35:09,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:35:09,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1207417708, now seen corresponding path program 1 times [2024-06-27 22:35:09,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:35:09,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514092219] [2024-06-27 22:35:09,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:35:09,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:35:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:35:09,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:35:09,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:35:09,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514092219] [2024-06-27 22:35:09,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514092219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:35:09,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:35:09,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:35:09,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569960301] [2024-06-27 22:35:09,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:35:09,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 22:35:09,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:35:09,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 22:35:09,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 22:35:09,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:35:09,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 516 transitions, 12289 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:35:09,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:35:09,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:35:09,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:35:13,001 INFO L124 PetriNetUnfolderBase]: 6724/11795 cut-off events. [2024-06-27 22:35:13,002 INFO L125 PetriNetUnfolderBase]: For 456145/456569 co-relation queries the response was YES. [2024-06-27 22:35:13,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79424 conditions, 11795 events. 6724/11795 cut-off events. For 456145/456569 co-relation queries the response was YES. Maximal size of possible extension queue 847. Compared 98351 event pairs, 1684 based on Foata normal form. 708/12233 useless extension candidates. Maximal degree in co-relation 79272. Up to 6008 conditions per place. [2024-06-27 22:35:13,443 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 402 selfloop transitions, 67 changer transitions 309/928 dead transitions. [2024-06-27 22:35:13,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 928 transitions, 23907 flow [2024-06-27 22:35:13,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:35:13,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:35:13,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 22:35:13,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541033434650456 [2024-06-27 22:35:13,444 INFO L175 Difference]: Start difference. First operand has 334 places, 516 transitions, 12289 flow. Second operand 7 states and 178 transitions. [2024-06-27 22:35:13,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 928 transitions, 23907 flow [2024-06-27 22:35:15,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 928 transitions, 23607 flow, removed 150 selfloop flow, removed 0 redundant places. [2024-06-27 22:35:15,068 INFO L231 Difference]: Finished difference. Result has 345 places, 518 transitions, 12274 flow [2024-06-27 22:35:15,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=12057, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12274, PETRI_PLACES=345, PETRI_TRANSITIONS=518} [2024-06-27 22:35:15,069 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 294 predicate places. [2024-06-27 22:35:15,069 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 518 transitions, 12274 flow [2024-06-27 22:35:15,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:35:15,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:35:15,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:35:15,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 22:35:15,069 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:35:15,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:35:15,069 INFO L85 PathProgramCache]: Analyzing trace with hash 393667, now seen corresponding path program 1 times [2024-06-27 22:35:15,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:35:15,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747617504] [2024-06-27 22:35:15,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:35:15,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:35:15,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:35:15,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:35:15,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:35:15,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747617504] [2024-06-27 22:35:15,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747617504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:35:15,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:35:15,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:35:15,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168595435] [2024-06-27 22:35:15,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:35:15,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:35:15,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:35:15,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:35:15,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:35:15,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:35:15,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 518 transitions, 12274 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:35:15,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:35:15,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:35:15,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:35:18,325 INFO L124 PetriNetUnfolderBase]: 6696/11429 cut-off events. [2024-06-27 22:35:18,325 INFO L125 PetriNetUnfolderBase]: For 430994/430994 co-relation queries the response was YES. [2024-06-27 22:35:18,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82955 conditions, 11429 events. 6696/11429 cut-off events. For 430994/430994 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 89388 event pairs, 1077 based on Foata normal form. 2/11290 useless extension candidates. Maximal degree in co-relation 82796. Up to 7592 conditions per place. [2024-06-27 22:35:18,486 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 444 selfloop transitions, 146 changer transitions 6/607 dead transitions. [2024-06-27 22:35:18,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 607 transitions, 15024 flow [2024-06-27 22:35:18,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:35:18,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:35:18,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 218 transitions. [2024-06-27 22:35:18,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.662613981762918 [2024-06-27 22:35:18,487 INFO L175 Difference]: Start difference. First operand has 345 places, 518 transitions, 12274 flow. Second operand 7 states and 218 transitions. [2024-06-27 22:35:18,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 607 transitions, 15024 flow [2024-06-27 22:35:20,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 607 transitions, 14941 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 22:35:20,287 INFO L231 Difference]: Finished difference. Result has 348 places, 538 transitions, 13238 flow [2024-06-27 22:35:20,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=12197, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13238, PETRI_PLACES=348, PETRI_TRANSITIONS=538} [2024-06-27 22:35:20,287 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 297 predicate places. [2024-06-27 22:35:20,287 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 538 transitions, 13238 flow [2024-06-27 22:35:20,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:35:20,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:35:20,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:35:20,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 22:35:20,288 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:35:20,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:35:20,288 INFO L85 PathProgramCache]: Analyzing trace with hash -2084445076, now seen corresponding path program 1 times [2024-06-27 22:35:20,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:35:20,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465308952] [2024-06-27 22:35:20,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:35:20,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:35:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:35:20,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:35:20,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:35:20,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465308952] [2024-06-27 22:35:20,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465308952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:35:20,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:35:20,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:35:20,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938218945] [2024-06-27 22:35:20,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:35:20,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:35:20,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:35:20,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:35:20,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:35:20,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:35:20,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 538 transitions, 13238 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:35:20,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:35:20,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:35:20,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:35:23,424 INFO L124 PetriNetUnfolderBase]: 6010/10450 cut-off events. [2024-06-27 22:35:23,424 INFO L125 PetriNetUnfolderBase]: For 423594/423594 co-relation queries the response was YES. [2024-06-27 22:35:23,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76636 conditions, 10450 events. 6010/10450 cut-off events. For 423594/423594 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 81463 event pairs, 1199 based on Foata normal form. 4/10306 useless extension candidates. Maximal degree in co-relation 76476. Up to 7710 conditions per place. [2024-06-27 22:35:23,575 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 475 selfloop transitions, 105 changer transitions 0/591 dead transitions. [2024-06-27 22:35:23,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 591 transitions, 14893 flow [2024-06-27 22:35:23,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:35:23,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:35:23,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-27 22:35:23,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6322188449848024 [2024-06-27 22:35:23,576 INFO L175 Difference]: Start difference. First operand has 348 places, 538 transitions, 13238 flow. Second operand 7 states and 208 transitions. [2024-06-27 22:35:23,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 591 transitions, 14893 flow [2024-06-27 22:35:25,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 591 transitions, 14583 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-27 22:35:25,544 INFO L231 Difference]: Finished difference. Result has 347 places, 541 transitions, 13283 flow [2024-06-27 22:35:25,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=12930, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13283, PETRI_PLACES=347, PETRI_TRANSITIONS=541} [2024-06-27 22:35:25,545 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 296 predicate places. [2024-06-27 22:35:25,545 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 541 transitions, 13283 flow [2024-06-27 22:35:25,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:35:25,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:35:25,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:35:25,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 22:35:25,545 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:35:25,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:35:25,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1973453747, now seen corresponding path program 2 times [2024-06-27 22:35:25,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:35:25,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193599725] [2024-06-27 22:35:25,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:35:25,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:35:25,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:35:25,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:35:25,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:35:25,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193599725] [2024-06-27 22:35:25,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193599725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:35:25,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:35:25,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:35:25,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648513622] [2024-06-27 22:35:25,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:35:25,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:35:25,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:35:25,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:35:25,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:35:25,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:35:25,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 541 transitions, 13283 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:35:25,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:35:25,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:35:25,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:35:28,444 INFO L124 PetriNetUnfolderBase]: 6048/10374 cut-off events. [2024-06-27 22:35:28,444 INFO L125 PetriNetUnfolderBase]: For 421039/421039 co-relation queries the response was YES. [2024-06-27 22:35:28,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76883 conditions, 10374 events. 6048/10374 cut-off events. For 421039/421039 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 79677 event pairs, 920 based on Foata normal form. 2/10240 useless extension candidates. Maximal degree in co-relation 76724. Up to 6868 conditions per place. [2024-06-27 22:35:28,595 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 449 selfloop transitions, 142 changer transitions 0/602 dead transitions. [2024-06-27 22:35:28,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 602 transitions, 15394 flow [2024-06-27 22:35:28,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:35:28,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:35:28,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-27 22:35:28,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413373860182371 [2024-06-27 22:35:28,596 INFO L175 Difference]: Start difference. First operand has 347 places, 541 transitions, 13283 flow. Second operand 7 states and 211 transitions. [2024-06-27 22:35:28,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 602 transitions, 15394 flow [2024-06-27 22:35:30,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 602 transitions, 15216 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 22:35:30,489 INFO L231 Difference]: Finished difference. Result has 350 places, 546 transitions, 13606 flow [2024-06-27 22:35:30,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=13105, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13606, PETRI_PLACES=350, PETRI_TRANSITIONS=546} [2024-06-27 22:35:30,490 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 299 predicate places. [2024-06-27 22:35:30,490 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 546 transitions, 13606 flow [2024-06-27 22:35:30,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:35:30,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:35:30,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:35:30,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 22:35:30,491 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:35:30,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:35:30,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1356624674, now seen corresponding path program 2 times [2024-06-27 22:35:30,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:35:30,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386482318] [2024-06-27 22:35:30,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:35:30,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:35:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:35:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:35:30,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:35:30,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386482318] [2024-06-27 22:35:30,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386482318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:35:30,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:35:30,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:35:30,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188252424] [2024-06-27 22:35:30,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:35:30,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:35:30,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:35:30,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:35:30,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:35:30,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:35:30,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 546 transitions, 13606 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:35:30,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:35:30,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:35:30,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:35:33,433 INFO L124 PetriNetUnfolderBase]: 6057/10513 cut-off events. [2024-06-27 22:35:33,433 INFO L125 PetriNetUnfolderBase]: For 433349/433353 co-relation queries the response was YES. [2024-06-27 22:35:33,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77857 conditions, 10513 events. 6057/10513 cut-off events. For 433349/433353 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 81888 event pairs, 1193 based on Foata normal form. 5/10363 useless extension candidates. Maximal degree in co-relation 77697. Up to 7740 conditions per place. [2024-06-27 22:35:33,591 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 433 selfloop transitions, 153 changer transitions 0/597 dead transitions. [2024-06-27 22:35:33,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 597 transitions, 15317 flow [2024-06-27 22:35:33,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:35:33,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:35:33,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-27 22:35:33,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5927051671732523 [2024-06-27 22:35:33,593 INFO L175 Difference]: Start difference. First operand has 350 places, 546 transitions, 13606 flow. Second operand 7 states and 195 transitions. [2024-06-27 22:35:33,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 597 transitions, 15317 flow [2024-06-27 22:35:35,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 597 transitions, 15034 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-27 22:35:35,656 INFO L231 Difference]: Finished difference. Result has 354 places, 559 transitions, 14133 flow [2024-06-27 22:35:35,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=13323, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14133, PETRI_PLACES=354, PETRI_TRANSITIONS=559} [2024-06-27 22:35:35,657 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 303 predicate places. [2024-06-27 22:35:35,657 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 559 transitions, 14133 flow [2024-06-27 22:35:35,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:35:35,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:35:35,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:35:35,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 22:35:35,658 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:35:35,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:35:35,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1265557263, now seen corresponding path program 3 times [2024-06-27 22:35:35,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:35:35,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240994528] [2024-06-27 22:35:35,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:35:35,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:35:35,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:35:35,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:35:35,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:35:35,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240994528] [2024-06-27 22:35:35,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240994528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:35:35,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:35:35,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:35:35,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424408752] [2024-06-27 22:35:35,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:35:35,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:35:35,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:35:35,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:35:35,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:35:35,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:35:35,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 559 transitions, 14133 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:35:35,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:35:35,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:35:35,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:35:38,494 INFO L124 PetriNetUnfolderBase]: 6065/10418 cut-off events. [2024-06-27 22:35:38,494 INFO L125 PetriNetUnfolderBase]: For 428540/428540 co-relation queries the response was YES. [2024-06-27 22:35:38,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77996 conditions, 10418 events. 6065/10418 cut-off events. For 428540/428540 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 80063 event pairs, 969 based on Foata normal form. 2/10289 useless extension candidates. Maximal degree in co-relation 77834. Up to 6901 conditions per place. [2024-06-27 22:35:38,660 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 446 selfloop transitions, 171 changer transitions 0/628 dead transitions. [2024-06-27 22:35:38,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 628 transitions, 16299 flow [2024-06-27 22:35:38,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 22:35:38,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 22:35:38,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 261 transitions. [2024-06-27 22:35:38,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6170212765957447 [2024-06-27 22:35:38,661 INFO L175 Difference]: Start difference. First operand has 354 places, 559 transitions, 14133 flow. Second operand 9 states and 261 transitions. [2024-06-27 22:35:38,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 628 transitions, 16299 flow [2024-06-27 22:35:40,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 628 transitions, 16143 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 22:35:40,684 INFO L231 Difference]: Finished difference. Result has 359 places, 562 transitions, 14504 flow [2024-06-27 22:35:40,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=13979, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14504, PETRI_PLACES=359, PETRI_TRANSITIONS=562} [2024-06-27 22:35:40,685 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 308 predicate places. [2024-06-27 22:35:40,685 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 562 transitions, 14504 flow [2024-06-27 22:35:40,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:35:40,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:35:40,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:35:40,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 22:35:40,685 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:35:40,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:35:40,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1774470129, now seen corresponding path program 4 times [2024-06-27 22:35:40,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:35:40,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901119464] [2024-06-27 22:35:40,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:35:40,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:35:40,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:35:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:35:40,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:35:40,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901119464] [2024-06-27 22:35:40,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901119464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:35:40,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:35:40,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:35:40,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083242430] [2024-06-27 22:35:40,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:35:40,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:35:40,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:35:40,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:35:40,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:35:40,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:35:40,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 562 transitions, 14504 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:35:40,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:35:40,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:35:40,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:35:43,727 INFO L124 PetriNetUnfolderBase]: 6351/10898 cut-off events. [2024-06-27 22:35:43,727 INFO L125 PetriNetUnfolderBase]: For 488697/488697 co-relation queries the response was YES. [2024-06-27 22:35:43,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84095 conditions, 10898 events. 6351/10898 cut-off events. For 488697/488697 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 84511 event pairs, 892 based on Foata normal form. 2/10760 useless extension candidates. Maximal degree in co-relation 83933. Up to 6185 conditions per place. [2024-06-27 22:35:43,904 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 490 selfloop transitions, 163 changer transitions 0/664 dead transitions. [2024-06-27 22:35:43,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 664 transitions, 17358 flow [2024-06-27 22:35:43,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 22:35:43,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 22:35:43,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 298 transitions. [2024-06-27 22:35:43,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6340425531914894 [2024-06-27 22:35:43,905 INFO L175 Difference]: Start difference. First operand has 359 places, 562 transitions, 14504 flow. Second operand 10 states and 298 transitions. [2024-06-27 22:35:43,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 664 transitions, 17358 flow [2024-06-27 22:35:46,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 664 transitions, 16918 flow, removed 67 selfloop flow, removed 7 redundant places. [2024-06-27 22:35:46,519 INFO L231 Difference]: Finished difference. Result has 363 places, 569 transitions, 14674 flow [2024-06-27 22:35:46,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=14064, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14674, PETRI_PLACES=363, PETRI_TRANSITIONS=569} [2024-06-27 22:35:46,520 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 312 predicate places. [2024-06-27 22:35:46,520 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 569 transitions, 14674 flow [2024-06-27 22:35:46,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:35:46,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:35:46,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:35:46,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 22:35:46,521 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:35:46,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:35:46,521 INFO L85 PathProgramCache]: Analyzing trace with hash 564662451, now seen corresponding path program 5 times [2024-06-27 22:35:46,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:35:46,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596264025] [2024-06-27 22:35:46,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:35:46,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:35:46,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:35:46,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:35:46,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:35:46,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596264025] [2024-06-27 22:35:46,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596264025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:35:46,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:35:46,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:35:46,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215831894] [2024-06-27 22:35:46,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:35:46,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:35:46,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:35:46,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:35:46,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:35:46,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:35:46,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 569 transitions, 14674 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:35:46,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:35:46,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:35:46,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:35:49,862 INFO L124 PetriNetUnfolderBase]: 6432/11015 cut-off events. [2024-06-27 22:35:49,862 INFO L125 PetriNetUnfolderBase]: For 523004/523004 co-relation queries the response was YES. [2024-06-27 22:35:49,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86344 conditions, 11015 events. 6432/11015 cut-off events. For 523004/523004 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 85351 event pairs, 882 based on Foata normal form. 2/10881 useless extension candidates. Maximal degree in co-relation 86180. Up to 6219 conditions per place. [2024-06-27 22:35:50,009 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 483 selfloop transitions, 169 changer transitions 0/663 dead transitions. [2024-06-27 22:35:50,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 663 transitions, 17478 flow [2024-06-27 22:35:50,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 22:35:50,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 22:35:50,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 294 transitions. [2024-06-27 22:35:50,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625531914893617 [2024-06-27 22:35:50,010 INFO L175 Difference]: Start difference. First operand has 363 places, 569 transitions, 14674 flow. Second operand 10 states and 294 transitions. [2024-06-27 22:35:50,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 663 transitions, 17478 flow [2024-06-27 22:35:52,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 663 transitions, 17135 flow, removed 91 selfloop flow, removed 6 redundant places. [2024-06-27 22:35:52,197 INFO L231 Difference]: Finished difference. Result has 369 places, 577 transitions, 15214 flow [2024-06-27 22:35:52,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=14339, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15214, PETRI_PLACES=369, PETRI_TRANSITIONS=577} [2024-06-27 22:35:52,198 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 318 predicate places. [2024-06-27 22:35:52,198 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 577 transitions, 15214 flow [2024-06-27 22:35:52,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:35:52,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:35:52,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:35:52,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 22:35:52,198 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:35:52,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:35:52,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1769107749, now seen corresponding path program 6 times [2024-06-27 22:35:52,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:35:52,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974215433] [2024-06-27 22:35:52,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:35:52,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:35:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:35:52,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:35:52,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:35:52,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974215433] [2024-06-27 22:35:52,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974215433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:35:52,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:35:52,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:35:52,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418085246] [2024-06-27 22:35:52,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:35:52,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:35:52,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:35:52,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:35:52,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:35:52,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:35:52,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 577 transitions, 15214 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:35:52,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:35:52,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:35:52,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:35:55,546 INFO L124 PetriNetUnfolderBase]: 6427/10970 cut-off events. [2024-06-27 22:35:55,546 INFO L125 PetriNetUnfolderBase]: For 542787/542787 co-relation queries the response was YES. [2024-06-27 22:35:55,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87848 conditions, 10970 events. 6427/10970 cut-off events. For 542787/542787 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 84585 event pairs, 955 based on Foata normal form. 2/10835 useless extension candidates. Maximal degree in co-relation 87680. Up to 6217 conditions per place. [2024-06-27 22:35:55,712 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 514 selfloop transitions, 143 changer transitions 0/668 dead transitions. [2024-06-27 22:35:55,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 668 transitions, 18087 flow [2024-06-27 22:35:55,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 22:35:55,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 22:35:55,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 274 transitions. [2024-06-27 22:35:55,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6477541371158393 [2024-06-27 22:35:55,713 INFO L175 Difference]: Start difference. First operand has 369 places, 577 transitions, 15214 flow. Second operand 9 states and 274 transitions. [2024-06-27 22:35:55,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 668 transitions, 18087 flow [2024-06-27 22:35:58,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 668 transitions, 17608 flow, removed 147 selfloop flow, removed 5 redundant places. [2024-06-27 22:35:58,216 INFO L231 Difference]: Finished difference. Result has 373 places, 577 transitions, 15028 flow [2024-06-27 22:35:58,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=14735, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15028, PETRI_PLACES=373, PETRI_TRANSITIONS=577} [2024-06-27 22:35:58,217 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 322 predicate places. [2024-06-27 22:35:58,217 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 577 transitions, 15028 flow [2024-06-27 22:35:58,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:35:58,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:35:58,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:35:58,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 22:35:58,217 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:35:58,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:35:58,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1769257479, now seen corresponding path program 7 times [2024-06-27 22:35:58,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:35:58,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700517436] [2024-06-27 22:35:58,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:35:58,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:35:58,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:35:58,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:35:58,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:35:58,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700517436] [2024-06-27 22:35:58,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700517436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:35:58,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:35:58,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:35:58,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854322644] [2024-06-27 22:35:58,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:35:58,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:35:58,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:35:58,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:35:58,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:35:58,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:35:58,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 577 transitions, 15028 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:35:58,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:35:58,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:35:58,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:36:01,292 INFO L124 PetriNetUnfolderBase]: 6465/11040 cut-off events. [2024-06-27 22:36:01,292 INFO L125 PetriNetUnfolderBase]: For 548634/548634 co-relation queries the response was YES. [2024-06-27 22:36:01,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88087 conditions, 11040 events. 6465/11040 cut-off events. For 548634/548634 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 85309 event pairs, 985 based on Foata normal form. 2/10889 useless extension candidates. Maximal degree in co-relation 87918. Up to 6233 conditions per place. [2024-06-27 22:36:01,466 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 502 selfloop transitions, 150 changer transitions 0/663 dead transitions. [2024-06-27 22:36:01,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 663 transitions, 17769 flow [2024-06-27 22:36:01,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 22:36:01,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 22:36:01,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 268 transitions. [2024-06-27 22:36:01,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6335697399527187 [2024-06-27 22:36:01,467 INFO L175 Difference]: Start difference. First operand has 373 places, 577 transitions, 15028 flow. Second operand 9 states and 268 transitions. [2024-06-27 22:36:01,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 663 transitions, 17769 flow [2024-06-27 22:36:03,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 663 transitions, 17457 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-27 22:36:03,967 INFO L231 Difference]: Finished difference. Result has 375 places, 580 transitions, 15208 flow [2024-06-27 22:36:03,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=14725, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15208, PETRI_PLACES=375, PETRI_TRANSITIONS=580} [2024-06-27 22:36:03,968 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 324 predicate places. [2024-06-27 22:36:03,968 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 580 transitions, 15208 flow [2024-06-27 22:36:03,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:36:03,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:36:03,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:36:03,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 22:36:03,968 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:36:03,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:36:03,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1138389582, now seen corresponding path program 1 times [2024-06-27 22:36:03,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:36:03,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546649847] [2024-06-27 22:36:03,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:36:03,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:36:03,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:36:04,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:36:04,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:36:04,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546649847] [2024-06-27 22:36:04,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546649847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:36:04,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:36:04,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:36:04,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933325889] [2024-06-27 22:36:04,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:36:04,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:36:04,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:36:04,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:36:04,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:36:04,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:36:04,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 580 transitions, 15208 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:36:04,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:36:04,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:36:04,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:36:07,266 INFO L124 PetriNetUnfolderBase]: 6494/11100 cut-off events. [2024-06-27 22:36:07,267 INFO L125 PetriNetUnfolderBase]: For 569753/569768 co-relation queries the response was YES. [2024-06-27 22:36:07,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87440 conditions, 11100 events. 6494/11100 cut-off events. For 569753/569768 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 85773 event pairs, 1032 based on Foata normal form. 14/10968 useless extension candidates. Maximal degree in co-relation 87271. Up to 7841 conditions per place. [2024-06-27 22:36:07,445 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 434 selfloop transitions, 218 changer transitions 0/663 dead transitions. [2024-06-27 22:36:07,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 663 transitions, 17416 flow [2024-06-27 22:36:07,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 22:36:07,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 22:36:07,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 283 transitions. [2024-06-27 22:36:07,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6021276595744681 [2024-06-27 22:36:07,446 INFO L175 Difference]: Start difference. First operand has 375 places, 580 transitions, 15208 flow. Second operand 10 states and 283 transitions. [2024-06-27 22:36:07,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 663 transitions, 17416 flow [2024-06-27 22:36:09,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 663 transitions, 17005 flow, removed 81 selfloop flow, removed 6 redundant places. [2024-06-27 22:36:10,008 INFO L231 Difference]: Finished difference. Result has 380 places, 588 transitions, 15555 flow [2024-06-27 22:36:10,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=14801, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15555, PETRI_PLACES=380, PETRI_TRANSITIONS=588} [2024-06-27 22:36:10,009 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 329 predicate places. [2024-06-27 22:36:10,009 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 588 transitions, 15555 flow [2024-06-27 22:36:10,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:36:10,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:36:10,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:36:10,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 22:36:10,010 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:36:10,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:36:10,010 INFO L85 PathProgramCache]: Analyzing trace with hash 360173260, now seen corresponding path program 3 times [2024-06-27 22:36:10,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:36:10,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870655019] [2024-06-27 22:36:10,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:36:10,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:36:10,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:36:10,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:36:10,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:36:10,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870655019] [2024-06-27 22:36:10,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870655019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:36:10,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:36:10,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:36:10,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136041436] [2024-06-27 22:36:10,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:36:10,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:36:10,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:36:10,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:36:10,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:36:10,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:36:10,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 588 transitions, 15555 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:36:10,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:36:10,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:36:10,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:36:13,374 INFO L124 PetriNetUnfolderBase]: 6552/11402 cut-off events. [2024-06-27 22:36:13,375 INFO L125 PetriNetUnfolderBase]: For 576757/576761 co-relation queries the response was YES. [2024-06-27 22:36:13,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89168 conditions, 11402 events. 6552/11402 cut-off events. For 576757/576761 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 90508 event pairs, 1280 based on Foata normal form. 5/11251 useless extension candidates. Maximal degree in co-relation 88997. Up to 8059 conditions per place. [2024-06-27 22:36:13,585 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 491 selfloop transitions, 158 changer transitions 0/660 dead transitions. [2024-06-27 22:36:13,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 660 transitions, 17673 flow [2024-06-27 22:36:13,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 22:36:13,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 22:36:13,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 268 transitions. [2024-06-27 22:36:13,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5702127659574469 [2024-06-27 22:36:13,586 INFO L175 Difference]: Start difference. First operand has 380 places, 588 transitions, 15555 flow. Second operand 10 states and 268 transitions. [2024-06-27 22:36:13,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 660 transitions, 17673 flow [2024-06-27 22:36:16,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 660 transitions, 17302 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-27 22:36:16,289 INFO L231 Difference]: Finished difference. Result has 383 places, 595 transitions, 15685 flow [2024-06-27 22:36:16,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=15186, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15685, PETRI_PLACES=383, PETRI_TRANSITIONS=595} [2024-06-27 22:36:16,289 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 332 predicate places. [2024-06-27 22:36:16,289 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 595 transitions, 15685 flow [2024-06-27 22:36:16,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:36:16,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:36:16,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:36:16,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 22:36:16,290 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:36:16,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:36:16,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1714170864, now seen corresponding path program 2 times [2024-06-27 22:36:16,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:36:16,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6406533] [2024-06-27 22:36:16,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:36:16,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:36:16,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:36:16,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:36:16,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:36:16,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6406533] [2024-06-27 22:36:16,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6406533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:36:16,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:36:16,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:36:16,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573754258] [2024-06-27 22:36:16,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:36:16,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:36:16,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:36:16,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:36:16,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:36:16,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:36:16,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 595 transitions, 15685 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:36:16,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:36:16,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:36:16,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:36:19,613 INFO L124 PetriNetUnfolderBase]: 6542/11235 cut-off events. [2024-06-27 22:36:19,613 INFO L125 PetriNetUnfolderBase]: For 560064/560070 co-relation queries the response was YES. [2024-06-27 22:36:19,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88163 conditions, 11235 events. 6542/11235 cut-off events. For 560064/560070 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 87660 event pairs, 1221 based on Foata normal form. 10/11098 useless extension candidates. Maximal degree in co-relation 87991. Up to 8575 conditions per place. [2024-06-27 22:36:19,802 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 494 selfloop transitions, 158 changer transitions 0/663 dead transitions. [2024-06-27 22:36:19,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 663 transitions, 17682 flow [2024-06-27 22:36:19,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 22:36:19,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 22:36:19,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 241 transitions. [2024-06-27 22:36:19,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6409574468085106 [2024-06-27 22:36:19,803 INFO L175 Difference]: Start difference. First operand has 383 places, 595 transitions, 15685 flow. Second operand 8 states and 241 transitions. [2024-06-27 22:36:19,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 663 transitions, 17682 flow [2024-06-27 22:36:22,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 663 transitions, 17450 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-06-27 22:36:22,446 INFO L231 Difference]: Finished difference. Result has 389 places, 599 transitions, 16085 flow [2024-06-27 22:36:22,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=15453, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16085, PETRI_PLACES=389, PETRI_TRANSITIONS=599} [2024-06-27 22:36:22,446 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 338 predicate places. [2024-06-27 22:36:22,446 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 599 transitions, 16085 flow [2024-06-27 22:36:22,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:36:22,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:36:22,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:36:22,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 22:36:22,447 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:36:22,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:36:22,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1779440049, now seen corresponding path program 8 times [2024-06-27 22:36:22,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:36:22,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999742710] [2024-06-27 22:36:22,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:36:22,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:36:22,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:36:22,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:36:22,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:36:22,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999742710] [2024-06-27 22:36:22,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999742710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:36:22,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:36:22,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:36:22,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734387909] [2024-06-27 22:36:22,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:36:22,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:36:22,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:36:22,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:36:22,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:36:22,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:36:22,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 599 transitions, 16085 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:36:22,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:36:22,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:36:22,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:36:25,726 INFO L124 PetriNetUnfolderBase]: 6623/11411 cut-off events. [2024-06-27 22:36:25,726 INFO L125 PetriNetUnfolderBase]: For 593172/593172 co-relation queries the response was YES. [2024-06-27 22:36:25,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91154 conditions, 11411 events. 6623/11411 cut-off events. For 593172/593172 co-relation queries the response was YES. Maximal size of possible extension queue 733. Compared 89595 event pairs, 979 based on Foata normal form. 2/11260 useless extension candidates. Maximal degree in co-relation 90979. Up to 6337 conditions per place. [2024-06-27 22:36:25,930 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 486 selfloop transitions, 180 changer transitions 0/677 dead transitions. [2024-06-27 22:36:25,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 677 transitions, 18607 flow [2024-06-27 22:36:25,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 22:36:25,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 22:36:25,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 265 transitions. [2024-06-27 22:36:25,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6264775413711584 [2024-06-27 22:36:25,931 INFO L175 Difference]: Start difference. First operand has 389 places, 599 transitions, 16085 flow. Second operand 9 states and 265 transitions. [2024-06-27 22:36:25,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 677 transitions, 18607 flow [2024-06-27 22:36:29,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 677 transitions, 18279 flow, removed 93 selfloop flow, removed 4 redundant places. [2024-06-27 22:36:29,204 INFO L231 Difference]: Finished difference. Result has 395 places, 605 transitions, 16517 flow [2024-06-27 22:36:29,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=15757, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16517, PETRI_PLACES=395, PETRI_TRANSITIONS=605} [2024-06-27 22:36:29,205 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 344 predicate places. [2024-06-27 22:36:29,205 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 605 transitions, 16517 flow [2024-06-27 22:36:29,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:36:29,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:36:29,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:36:29,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 22:36:29,206 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:36:29,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:36:29,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1842623260, now seen corresponding path program 4 times [2024-06-27 22:36:29,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:36:29,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712696492] [2024-06-27 22:36:29,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:36:29,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:36:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:36:29,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:36:29,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:36:29,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712696492] [2024-06-27 22:36:29,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712696492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:36:29,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:36:29,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:36:29,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870418739] [2024-06-27 22:36:29,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:36:29,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:36:29,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:36:29,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:36:29,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:36:29,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:36:29,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 605 transitions, 16517 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:36:29,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:36:29,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:36:29,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:36:33,013 INFO L124 PetriNetUnfolderBase]: 6685/11640 cut-off events. [2024-06-27 22:36:33,013 INFO L125 PetriNetUnfolderBase]: For 629982/629986 co-relation queries the response was YES. [2024-06-27 22:36:33,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93085 conditions, 11640 events. 6685/11640 cut-off events. For 629982/629986 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 92763 event pairs, 1357 based on Foata normal form. 5/11491 useless extension candidates. Maximal degree in co-relation 92908. Up to 8200 conditions per place. [2024-06-27 22:36:33,174 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 497 selfloop transitions, 171 changer transitions 0/679 dead transitions. [2024-06-27 22:36:33,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 679 transitions, 18570 flow [2024-06-27 22:36:33,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 22:36:33,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 22:36:33,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 295 transitions. [2024-06-27 22:36:33,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5705996131528046 [2024-06-27 22:36:33,175 INFO L175 Difference]: Start difference. First operand has 395 places, 605 transitions, 16517 flow. Second operand 11 states and 295 transitions. [2024-06-27 22:36:33,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 679 transitions, 18570 flow [2024-06-27 22:36:35,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 679 transitions, 18181 flow, removed 101 selfloop flow, removed 5 redundant places. [2024-06-27 22:36:35,963 INFO L231 Difference]: Finished difference. Result has 401 places, 609 transitions, 16595 flow [2024-06-27 22:36:35,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=16128, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16595, PETRI_PLACES=401, PETRI_TRANSITIONS=609} [2024-06-27 22:36:35,964 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 350 predicate places. [2024-06-27 22:36:35,964 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 609 transitions, 16595 flow [2024-06-27 22:36:35,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:36:35,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:36:35,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:36:35,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 22:36:35,964 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:36:35,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:36:35,965 INFO L85 PathProgramCache]: Analyzing trace with hash 2070891109, now seen corresponding path program 9 times [2024-06-27 22:36:35,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:36:35,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990630684] [2024-06-27 22:36:35,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:36:35,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:36:35,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:36:36,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:36:36,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:36:36,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990630684] [2024-06-27 22:36:36,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990630684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:36:36,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:36:36,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:36:36,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103195185] [2024-06-27 22:36:36,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:36:36,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:36:36,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:36:36,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:36:36,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:36:36,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:36:36,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 609 transitions, 16595 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:36:36,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:36:36,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:36:36,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:36:39,316 INFO L124 PetriNetUnfolderBase]: 6680/11489 cut-off events. [2024-06-27 22:36:39,317 INFO L125 PetriNetUnfolderBase]: For 609468/609468 co-relation queries the response was YES. [2024-06-27 22:36:39,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91986 conditions, 11489 events. 6680/11489 cut-off events. For 609468/609468 co-relation queries the response was YES. Maximal size of possible extension queue 749. Compared 90500 event pairs, 988 based on Foata normal form. 2/11350 useless extension candidates. Maximal degree in co-relation 91808. Up to 6351 conditions per place. [2024-06-27 22:36:39,494 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 492 selfloop transitions, 177 changer transitions 0/680 dead transitions. [2024-06-27 22:36:39,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 680 transitions, 18631 flow [2024-06-27 22:36:39,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 22:36:39,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 22:36:39,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 263 transitions. [2024-06-27 22:36:39,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6217494089834515 [2024-06-27 22:36:39,495 INFO L175 Difference]: Start difference. First operand has 401 places, 609 transitions, 16595 flow. Second operand 9 states and 263 transitions. [2024-06-27 22:36:39,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 680 transitions, 18631 flow [2024-06-27 22:36:42,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 680 transitions, 18291 flow, removed 75 selfloop flow, removed 5 redundant places. [2024-06-27 22:36:42,547 INFO L231 Difference]: Finished difference. Result has 405 places, 609 transitions, 16617 flow [2024-06-27 22:36:42,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=16257, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16617, PETRI_PLACES=405, PETRI_TRANSITIONS=609} [2024-06-27 22:36:42,547 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 354 predicate places. [2024-06-27 22:36:42,547 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 609 transitions, 16617 flow [2024-06-27 22:36:42,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:36:42,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:36:42,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:36:42,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 22:36:42,548 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:36:42,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:36:42,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1843960880, now seen corresponding path program 3 times [2024-06-27 22:36:42,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:36:42,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308384401] [2024-06-27 22:36:42,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:36:42,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:36:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:36:42,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:36:42,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:36:42,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308384401] [2024-06-27 22:36:42,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308384401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:36:42,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:36:42,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:36:42,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190513367] [2024-06-27 22:36:42,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:36:42,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:36:42,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:36:42,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:36:42,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:36:42,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:36:42,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 609 transitions, 16617 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:36:42,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:36:42,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:36:42,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:36:46,040 INFO L124 PetriNetUnfolderBase]: 6811/11795 cut-off events. [2024-06-27 22:36:46,040 INFO L125 PetriNetUnfolderBase]: For 662386/662472 co-relation queries the response was YES. [2024-06-27 22:36:46,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94515 conditions, 11795 events. 6811/11795 cut-off events. For 662386/662472 co-relation queries the response was YES. Maximal size of possible extension queue 762. Compared 93850 event pairs, 1114 based on Foata normal form. 33/11655 useless extension candidates. Maximal degree in co-relation 94337. Up to 8249 conditions per place. [2024-06-27 22:36:46,253 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 453 selfloop transitions, 215 changer transitions 0/679 dead transitions. [2024-06-27 22:36:46,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 679 transitions, 18961 flow [2024-06-27 22:36:46,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 22:36:46,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 22:36:46,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-27 22:36:46,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6196808510638298 [2024-06-27 22:36:46,254 INFO L175 Difference]: Start difference. First operand has 405 places, 609 transitions, 16617 flow. Second operand 8 states and 233 transitions. [2024-06-27 22:36:46,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 679 transitions, 18961 flow [2024-06-27 22:36:50,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 679 transitions, 18693 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 22:36:50,118 INFO L231 Difference]: Finished difference. Result has 406 places, 619 transitions, 17132 flow [2024-06-27 22:36:50,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=16355, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17132, PETRI_PLACES=406, PETRI_TRANSITIONS=619} [2024-06-27 22:36:50,119 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 355 predicate places. [2024-06-27 22:36:50,119 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 619 transitions, 17132 flow [2024-06-27 22:36:50,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:36:50,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:36:50,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:36:50,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 22:36:50,119 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:36:50,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:36:50,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1813322339, now seen corresponding path program 10 times [2024-06-27 22:36:50,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:36:50,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12569729] [2024-06-27 22:36:50,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:36:50,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:36:50,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:36:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:36:50,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:36:50,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12569729] [2024-06-27 22:36:50,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12569729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:36:50,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:36:50,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:36:50,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231420716] [2024-06-27 22:36:50,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:36:50,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:36:50,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:36:50,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:36:50,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:36:50,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:36:50,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 619 transitions, 17132 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:36:50,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:36:50,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:36:50,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:36:53,841 INFO L124 PetriNetUnfolderBase]: 6832/11876 cut-off events. [2024-06-27 22:36:53,841 INFO L125 PetriNetUnfolderBase]: For 659230/659236 co-relation queries the response was YES. [2024-06-27 22:36:53,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95302 conditions, 11876 events. 6832/11876 cut-off events. For 659230/659236 co-relation queries the response was YES. Maximal size of possible extension queue 774. Compared 95067 event pairs, 1073 based on Foata normal form. 6/11737 useless extension candidates. Maximal degree in co-relation 95123. Up to 6455 conditions per place. [2024-06-27 22:36:54,025 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 473 selfloop transitions, 200 changer transitions 0/684 dead transitions. [2024-06-27 22:36:54,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 684 transitions, 19666 flow [2024-06-27 22:36:54,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 22:36:54,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 22:36:54,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-06-27 22:36:54,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 22:36:54,026 INFO L175 Difference]: Start difference. First operand has 406 places, 619 transitions, 17132 flow. Second operand 8 states and 235 transitions. [2024-06-27 22:36:54,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 684 transitions, 19666 flow [2024-06-27 22:36:57,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 684 transitions, 19177 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 22:36:57,389 INFO L231 Difference]: Finished difference. Result has 407 places, 625 transitions, 17448 flow [2024-06-27 22:36:57,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=16643, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17448, PETRI_PLACES=407, PETRI_TRANSITIONS=625} [2024-06-27 22:36:57,390 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 356 predicate places. [2024-06-27 22:36:57,390 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 625 transitions, 17448 flow [2024-06-27 22:36:57,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:36:57,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:36:57,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:36:57,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 22:36:57,390 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:36:57,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:36:57,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1324479751, now seen corresponding path program 11 times [2024-06-27 22:36:57,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:36:57,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541860697] [2024-06-27 22:36:57,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:36:57,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:36:57,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:36:57,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:36:57,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:36:57,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541860697] [2024-06-27 22:36:57,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541860697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:36:57,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:36:57,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:36:57,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966234388] [2024-06-27 22:36:57,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:36:57,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:36:57,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:36:57,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:36:57,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:36:57,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:36:57,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 625 transitions, 17448 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:36:57,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:36:57,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:36:57,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:37:01,075 INFO L124 PetriNetUnfolderBase]: 6827/11854 cut-off events. [2024-06-27 22:37:01,076 INFO L125 PetriNetUnfolderBase]: For 681353/681359 co-relation queries the response was YES. [2024-06-27 22:37:01,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95821 conditions, 11854 events. 6827/11854 cut-off events. For 681353/681359 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 94642 event pairs, 1064 based on Foata normal form. 6/11716 useless extension candidates. Maximal degree in co-relation 95640. Up to 6453 conditions per place. [2024-06-27 22:37:01,277 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 477 selfloop transitions, 197 changer transitions 0/685 dead transitions. [2024-06-27 22:37:01,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 685 transitions, 19476 flow [2024-06-27 22:37:01,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 22:37:01,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 22:37:01,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-06-27 22:37:01,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6276595744680851 [2024-06-27 22:37:01,278 INFO L175 Difference]: Start difference. First operand has 407 places, 625 transitions, 17448 flow. Second operand 8 states and 236 transitions. [2024-06-27 22:37:01,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 685 transitions, 19476 flow [2024-06-27 22:37:05,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 685 transitions, 18932 flow, removed 163 selfloop flow, removed 4 redundant places. [2024-06-27 22:37:05,523 INFO L231 Difference]: Finished difference. Result has 411 places, 625 transitions, 17304 flow [2024-06-27 22:37:05,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=16904, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17304, PETRI_PLACES=411, PETRI_TRANSITIONS=625} [2024-06-27 22:37:05,523 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 360 predicate places. [2024-06-27 22:37:05,523 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 625 transitions, 17304 flow [2024-06-27 22:37:05,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:37:05,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:37:05,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:37:05,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 22:37:05,524 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:37:05,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:37:05,524 INFO L85 PathProgramCache]: Analyzing trace with hash -920988024, now seen corresponding path program 5 times [2024-06-27 22:37:05,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:37:05,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314057782] [2024-06-27 22:37:05,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:37:05,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:37:05,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:37:05,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:37:05,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:37:05,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314057782] [2024-06-27 22:37:05,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314057782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:37:05,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:37:05,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:37:05,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274386278] [2024-06-27 22:37:05,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:37:05,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:37:05,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:37:05,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:37:05,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:37:05,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:37:05,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 625 transitions, 17304 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:37:05,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:37:05,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:37:05,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:37:09,545 INFO L124 PetriNetUnfolderBase]: 6878/11994 cut-off events. [2024-06-27 22:37:09,545 INFO L125 PetriNetUnfolderBase]: For 703783/703867 co-relation queries the response was YES. [2024-06-27 22:37:09,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95896 conditions, 11994 events. 6878/11994 cut-off events. For 703783/703867 co-relation queries the response was YES. Maximal size of possible extension queue 786. Compared 96522 event pairs, 1277 based on Foata normal form. 36/11865 useless extension candidates. Maximal degree in co-relation 95714. Up to 8434 conditions per place. [2024-06-27 22:37:09,739 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 500 selfloop transitions, 159 changer transitions 0/670 dead transitions. [2024-06-27 22:37:09,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 670 transitions, 19171 flow [2024-06-27 22:37:09,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 22:37:09,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 22:37:09,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-27 22:37:09,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718085106382979 [2024-06-27 22:37:09,740 INFO L175 Difference]: Start difference. First operand has 411 places, 625 transitions, 17304 flow. Second operand 8 states and 215 transitions. [2024-06-27 22:37:09,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 670 transitions, 19171 flow [2024-06-27 22:37:12,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 670 transitions, 18597 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 22:37:13,001 INFO L231 Difference]: Finished difference. Result has 411 places, 627 transitions, 17106 flow [2024-06-27 22:37:13,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=16730, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17106, PETRI_PLACES=411, PETRI_TRANSITIONS=627} [2024-06-27 22:37:13,001 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 360 predicate places. [2024-06-27 22:37:13,002 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 627 transitions, 17106 flow [2024-06-27 22:37:13,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:37:13,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:37:13,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:37:13,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 22:37:13,002 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:37:13,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:37:13,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1805041402, now seen corresponding path program 6 times [2024-06-27 22:37:13,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:37:13,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808615106] [2024-06-27 22:37:13,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:37:13,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:37:13,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:37:13,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:37:13,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:37:13,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808615106] [2024-06-27 22:37:13,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808615106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:37:13,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:37:13,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:37:13,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736237139] [2024-06-27 22:37:13,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:37:13,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:37:13,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:37:13,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:37:13,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:37:13,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:37:13,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 627 transitions, 17106 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:37:13,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:37:13,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:37:13,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:37:17,059 INFO L124 PetriNetUnfolderBase]: 6870/11971 cut-off events. [2024-06-27 22:37:17,059 INFO L125 PetriNetUnfolderBase]: For 654386/654390 co-relation queries the response was YES. [2024-06-27 22:37:17,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94221 conditions, 11971 events. 6870/11971 cut-off events. For 654386/654390 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 95815 event pairs, 1366 based on Foata normal form. 5/11823 useless extension candidates. Maximal degree in co-relation 94038. Up to 8430 conditions per place. [2024-06-27 22:37:17,238 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 477 selfloop transitions, 204 changer transitions 0/692 dead transitions. [2024-06-27 22:37:17,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 692 transitions, 18868 flow [2024-06-27 22:37:17,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 22:37:17,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 22:37:17,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 293 transitions. [2024-06-27 22:37:17,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5667311411992263 [2024-06-27 22:37:17,239 INFO L175 Difference]: Start difference. First operand has 411 places, 627 transitions, 17106 flow. Second operand 11 states and 293 transitions. [2024-06-27 22:37:17,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 692 transitions, 18868 flow [2024-06-27 22:37:20,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 692 transitions, 18503 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 22:37:20,326 INFO L231 Difference]: Finished difference. Result has 417 places, 627 transitions, 17180 flow [2024-06-27 22:37:20,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=16741, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17180, PETRI_PLACES=417, PETRI_TRANSITIONS=627} [2024-06-27 22:37:20,327 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 366 predicate places. [2024-06-27 22:37:20,327 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 627 transitions, 17180 flow [2024-06-27 22:37:20,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:37:20,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:37:20,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:37:20,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 22:37:20,327 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:37:20,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:37:20,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1813315426, now seen corresponding path program 4 times [2024-06-27 22:37:20,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:37:20,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219797744] [2024-06-27 22:37:20,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:37:20,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:37:20,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:37:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:37:20,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:37:20,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219797744] [2024-06-27 22:37:20,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219797744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:37:20,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:37:20,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:37:20,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783138288] [2024-06-27 22:37:20,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:37:20,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:37:20,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:37:20,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:37:20,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:37:20,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:37:20,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 627 transitions, 17180 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:37:20,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:37:20,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:37:20,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:37:24,682 INFO L124 PetriNetUnfolderBase]: 7001/12034 cut-off events. [2024-06-27 22:37:24,683 INFO L125 PetriNetUnfolderBase]: For 673779/673794 co-relation queries the response was YES. [2024-06-27 22:37:24,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96458 conditions, 12034 events. 7001/12034 cut-off events. For 673779/673794 co-relation queries the response was YES. Maximal size of possible extension queue 791. Compared 95194 event pairs, 1108 based on Foata normal form. 12/11876 useless extension candidates. Maximal degree in co-relation 96274. Up to 8454 conditions per place. [2024-06-27 22:37:24,887 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 449 selfloop transitions, 259 changer transitions 0/719 dead transitions. [2024-06-27 22:37:24,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 719 transitions, 19712 flow [2024-06-27 22:37:24,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 22:37:24,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 22:37:24,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 308 transitions. [2024-06-27 22:37:24,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5957446808510638 [2024-06-27 22:37:24,888 INFO L175 Difference]: Start difference. First operand has 417 places, 627 transitions, 17180 flow. Second operand 11 states and 308 transitions. [2024-06-27 22:37:24,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 719 transitions, 19712 flow [2024-06-27 22:37:28,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 719 transitions, 19312 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-27 22:37:28,560 INFO L231 Difference]: Finished difference. Result has 418 places, 637 transitions, 17737 flow [2024-06-27 22:37:28,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=16784, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17737, PETRI_PLACES=418, PETRI_TRANSITIONS=637} [2024-06-27 22:37:28,561 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 367 predicate places. [2024-06-27 22:37:28,561 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 637 transitions, 17737 flow [2024-06-27 22:37:28,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:37:28,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:37:28,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:37:28,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 22:37:28,562 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:37:28,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:37:28,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1805041216, now seen corresponding path program 5 times [2024-06-27 22:37:28,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:37:28,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032477634] [2024-06-27 22:37:28,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:37:28,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:37:28,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:37:28,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:37:28,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:37:28,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032477634] [2024-06-27 22:37:28,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032477634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:37:28,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:37:28,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:37:28,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637510248] [2024-06-27 22:37:28,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:37:28,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:37:28,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:37:28,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:37:28,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:37:28,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:37:28,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 637 transitions, 17737 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:37:28,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:37:28,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:37:28,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:37:32,627 INFO L124 PetriNetUnfolderBase]: 6996/12015 cut-off events. [2024-06-27 22:37:32,627 INFO L125 PetriNetUnfolderBase]: For 677301/677316 co-relation queries the response was YES. [2024-06-27 22:37:32,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97586 conditions, 12015 events. 6996/12015 cut-off events. For 677301/677316 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 95036 event pairs, 1051 based on Foata normal form. 12/11856 useless extension candidates. Maximal degree in co-relation 97403. Up to 8450 conditions per place. [2024-06-27 22:37:32,813 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 427 selfloop transitions, 271 changer transitions 0/709 dead transitions. [2024-06-27 22:37:32,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 709 transitions, 19550 flow [2024-06-27 22:37:32,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 22:37:32,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 22:37:32,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 303 transitions. [2024-06-27 22:37:32,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.586073500967118 [2024-06-27 22:37:32,814 INFO L175 Difference]: Start difference. First operand has 418 places, 637 transitions, 17737 flow. Second operand 11 states and 303 transitions. [2024-06-27 22:37:32,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 709 transitions, 19550 flow [2024-06-27 22:37:35,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 709 transitions, 19246 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 22:37:35,994 INFO L231 Difference]: Finished difference. Result has 422 places, 637 transitions, 18085 flow [2024-06-27 22:37:35,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=17433, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=18085, PETRI_PLACES=422, PETRI_TRANSITIONS=637} [2024-06-27 22:37:35,994 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 371 predicate places. [2024-06-27 22:37:35,994 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 637 transitions, 18085 flow [2024-06-27 22:37:35,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:37:35,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:37:35,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:37:35,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 22:37:35,995 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:37:35,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:37:35,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1225947736, now seen corresponding path program 1 times [2024-06-27 22:37:35,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:37:35,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873110235] [2024-06-27 22:37:35,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:37:35,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:37:36,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:37:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:37:36,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:37:36,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873110235] [2024-06-27 22:37:36,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873110235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:37:36,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:37:36,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:37:36,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286790512] [2024-06-27 22:37:36,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:37:36,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:37:36,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:37:36,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:37:36,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:37:36,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:37:36,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 637 transitions, 18085 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:37:36,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:37:36,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:37:36,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:37:40,414 INFO L124 PetriNetUnfolderBase]: 7103/12382 cut-off events. [2024-06-27 22:37:40,414 INFO L125 PetriNetUnfolderBase]: For 693412/693427 co-relation queries the response was YES. [2024-06-27 22:37:40,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99834 conditions, 12382 events. 7103/12382 cut-off events. For 693412/693427 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 100011 event pairs, 1705 based on Foata normal form. 12/12223 useless extension candidates. Maximal degree in co-relation 99651. Up to 9663 conditions per place. [2024-06-27 22:37:40,592 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 642 selfloop transitions, 58 changer transitions 0/711 dead transitions. [2024-06-27 22:37:40,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 711 transitions, 20171 flow [2024-06-27 22:37:40,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 22:37:40,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 22:37:40,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 255 transitions. [2024-06-27 22:37:40,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6028368794326241 [2024-06-27 22:37:40,593 INFO L175 Difference]: Start difference. First operand has 422 places, 637 transitions, 18085 flow. Second operand 9 states and 255 transitions. [2024-06-27 22:37:40,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 711 transitions, 20171 flow [2024-06-27 22:37:43,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 711 transitions, 19605 flow, removed 32 selfloop flow, removed 10 redundant places. [2024-06-27 22:37:43,900 INFO L231 Difference]: Finished difference. Result has 423 places, 646 transitions, 17897 flow [2024-06-27 22:37:43,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=17545, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17897, PETRI_PLACES=423, PETRI_TRANSITIONS=646} [2024-06-27 22:37:43,900 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 372 predicate places. [2024-06-27 22:37:43,900 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 646 transitions, 17897 flow [2024-06-27 22:37:43,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:37:43,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:37:43,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:37:43,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 22:37:43,901 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:37:43,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:37:43,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1472854785, now seen corresponding path program 12 times [2024-06-27 22:37:43,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:37:43,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53958992] [2024-06-27 22:37:43,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:37:43,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:37:43,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:37:44,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:37:44,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:37:44,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53958992] [2024-06-27 22:37:44,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53958992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:37:44,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:37:44,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:37:44,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787885321] [2024-06-27 22:37:44,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:37:44,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:37:44,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:37:44,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:37:44,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:37:44,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-06-27 22:37:44,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 646 transitions, 17897 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:37:44,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:37:44,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-06-27 22:37:44,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand