./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe018_rmo.opt.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/safe018_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe018_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe018_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 22:49:35,628 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 22:49:35,690 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 22:49:35,696 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 22:49:35,696 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 22:49:35,722 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 22:49:35,725 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 22:49:35,725 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 22:49:35,726 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 22:49:35,729 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 22:49:35,729 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 22:49:35,729 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 22:49:35,730 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 22:49:35,731 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 22:49:35,731 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 22:49:35,731 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 22:49:35,731 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 22:49:35,732 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 22:49:35,732 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 22:49:35,732 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 22:49:35,733 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 22:49:35,733 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 22:49:35,734 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 22:49:35,734 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 22:49:35,734 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 22:49:35,734 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 22:49:35,734 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 22:49:35,735 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 22:49:35,735 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 22:49:35,735 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 22:49:35,736 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 22:49:35,736 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 22:49:35,736 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 22:49:35,737 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 22:49:35,737 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 22:49:35,737 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 22:49:35,737 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 22:49:35,737 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 22:49:35,738 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 22:49:35,738 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 22:49:35,738 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 22:49:35,738 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 22:49:35,738 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 22:49:35,738 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 22:49:35,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 22:49:35,949 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 22:49:35,951 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 22:49:35,952 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 22:49:35,952 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 22:49:35,953 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe018_rmo.opt.i [2024-06-27 22:49:36,906 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 22:49:37,096 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 22:49:37,097 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe018_rmo.opt.i [2024-06-27 22:49:37,108 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65aa654da/84b538175704444887743e72cbee8960/FLAG19271df57 [2024-06-27 22:49:37,120 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65aa654da/84b538175704444887743e72cbee8960 [2024-06-27 22:49:37,122 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 22:49:37,127 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 22:49:37,129 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe018_rmo.opt.yml/witness.yml [2024-06-27 22:49:37,203 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 22:49:37,204 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 22:49:37,207 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 22:49:37,207 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 22:49:37,210 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 22:49:37,211 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 10:49:37" (1/2) ... [2024-06-27 22:49:37,212 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ae425b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 10:49:37, skipping insertion in model container [2024-06-27 22:49:37,212 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 10:49:37" (1/2) ... [2024-06-27 22:49:37,214 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@50475832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 10:49:37, skipping insertion in model container [2024-06-27 22:49:37,214 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 10:49:37" (2/2) ... [2024-06-27 22:49:37,215 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ae425b5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:49:37, skipping insertion in model container [2024-06-27 22:49:37,215 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 10:49:37" (2/2) ... [2024-06-27 22:49:37,215 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 22:49:37,241 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 22:49:37,242 INFO L97 edCorrectnessWitness]: Location invariant before [L852-L852] ! multithreaded || ((((0LL - (long long )__unbuffered_p0_EAX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p0_EBX) + (long long )x$mem_tmp >= 0LL) && (long long )x - (long long )x$mem_tmp >= 0LL) [2024-06-27 22:49:37,242 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] ! multithreaded || ((((0LL - (long long )__unbuffered_p0_EAX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p0_EBX) + (long long )x$mem_tmp >= 0LL) && (long long )x - (long long )x$mem_tmp >= 0LL) [2024-06-27 22:49:37,242 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ! multithreaded || ((((0LL - (long long )__unbuffered_p0_EAX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p0_EBX) + (long long )x$mem_tmp >= 0LL) && (long long )x - (long long )x$mem_tmp >= 0LL) [2024-06-27 22:49:37,242 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 22:49:37,243 INFO L106 edCorrectnessWitness]: ghost_update [L850-L850] multithreaded = 1; [2024-06-27 22:49:37,282 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 22:49:37,415 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/safe018_rmo.opt.i[992,1005] [2024-06-27 22:49:37,557 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 22:49:37,567 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 22:49:37,593 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/safe018_rmo.opt.i[992,1005] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 22:49:37,672 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 22:49:37,715 INFO L206 MainTranslator]: Completed translation [2024-06-27 22:49:37,715 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:49:37 WrapperNode [2024-06-27 22:49:37,716 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 22:49:37,716 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 22:49:37,716 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 22:49:37,717 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 22:49:37,722 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 10:49:37" (1/1) ... [2024-06-27 22:49:37,751 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 10:49:37" (1/1) ... [2024-06-27 22:49:37,777 INFO L138 Inliner]: procedures = 175, calls = 67, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 152 [2024-06-27 22:49:37,780 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 22:49:37,781 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 22:49:37,782 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 22:49:37,782 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 22:49:37,790 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 10:49:37" (1/1) ... [2024-06-27 22:49:37,790 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 10:49:37" (1/1) ... [2024-06-27 22:49:37,803 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 10:49:37" (1/1) ... [2024-06-27 22:49:37,831 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 8 writes are split as follows [0, 8]. [2024-06-27 22:49:37,833 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 10:49:37" (1/1) ... [2024-06-27 22:49:37,833 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 10:49:37" (1/1) ... [2024-06-27 22:49:37,839 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 10:49:37" (1/1) ... [2024-06-27 22:49:37,852 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 10:49:37" (1/1) ... [2024-06-27 22:49:37,854 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 10:49:37" (1/1) ... [2024-06-27 22:49:37,860 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 10:49:37" (1/1) ... [2024-06-27 22:49:37,863 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 22:49:37,866 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 22:49:37,866 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 22:49:37,866 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 22:49:37,867 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 10:49:37" (1/1) ... [2024-06-27 22:49:37,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 22:49:37,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 22:49:37,901 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 22:49:37,908 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 22:49:37,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 22:49:37,928 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 22:49:37,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 22:49:37,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 22:49:37,928 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 22:49:37,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 22:49:37,928 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 22:49:37,928 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 22:49:37,928 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 22:49:37,929 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 22:49:37,929 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 22:49:37,929 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 22:49:37,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 22:49:37,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 22:49:37,929 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 22:49:37,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 22:49:37,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 22:49:37,931 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 22:49:38,040 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 22:49:38,041 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 22:49:38,292 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 22:49:38,292 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 22:49:38,514 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 22:49:38,514 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 22:49:38,514 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 10:49:38 BoogieIcfgContainer [2024-06-27 22:49:38,514 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 22:49:38,517 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 22:49:38,517 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 22:49:38,519 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 22:49:38,519 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 10:49:37" (1/4) ... [2024-06-27 22:49:38,520 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22f767c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 10:49:38, skipping insertion in model container [2024-06-27 22:49:38,520 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 10:49:37" (2/4) ... [2024-06-27 22:49:38,521 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22f767c7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 10:49:38, skipping insertion in model container [2024-06-27 22:49:38,521 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 10:49:37" (3/4) ... [2024-06-27 22:49:38,522 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22f767c7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 10:49:38, skipping insertion in model container [2024-06-27 22:49:38,522 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 10:49:38" (4/4) ... [2024-06-27 22:49:38,524 INFO L112 eAbstractionObserver]: Analyzing ICFG safe018_rmo.opt.i [2024-06-27 22:49:38,538 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 22:49:38,539 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 22:49:38,539 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 22:49:38,581 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 22:49:38,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 46 transitions, 104 flow [2024-06-27 22:49:38,635 INFO L124 PetriNetUnfolderBase]: 1/43 cut-off events. [2024-06-27 22:49:38,635 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 22:49:38,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 43 events. 1/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 53 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2024-06-27 22:49:38,638 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 46 transitions, 104 flow [2024-06-27 22:49:38,642 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 40 transitions, 89 flow [2024-06-27 22:49:38,647 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 22:49:38,653 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;@2a2c149b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 22:49:38,653 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 22:49:38,658 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 22:49:38,658 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 22:49:38,658 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 22:49:38,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:49:38,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 22:49:38,659 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 22:49:38,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:49:38,663 INFO L85 PathProgramCache]: Analyzing trace with hash 644149000, now seen corresponding path program 1 times [2024-06-27 22:49:38,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:49:38,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388720383] [2024-06-27 22:49:38,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:49:38,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:49:38,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:49:39,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:49:39,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:49:39,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388720383] [2024-06-27 22:49:39,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388720383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:49:39,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:49:39,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 22:49:39,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350746782] [2024-06-27 22:49:39,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:49:39,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 22:49:39,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:49:39,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 22:49:39,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 22:49:39,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-06-27 22:49:39,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:49:39,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:49:39,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-06-27 22:49:39,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:49:39,443 INFO L124 PetriNetUnfolderBase]: 1227/2090 cut-off events. [2024-06-27 22:49:39,444 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-06-27 22:49:39,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3967 conditions, 2090 events. 1227/2090 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 12775 event pairs, 708 based on Foata normal form. 0/2008 useless extension candidates. Maximal degree in co-relation 3955. Up to 1827 conditions per place. [2024-06-27 22:49:39,457 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 40 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-27 22:49:39,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 56 transitions, 217 flow [2024-06-27 22:49:39,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 22:49:39,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 22:49:39,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-06-27 22:49:39,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6739130434782609 [2024-06-27 22:49:39,468 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 89 flow. Second operand 3 states and 93 transitions. [2024-06-27 22:49:39,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 56 transitions, 217 flow [2024-06-27 22:49:39,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 56 transitions, 212 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 22:49:39,476 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 123 flow [2024-06-27 22:49:39,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-06-27 22:49:39,480 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2024-06-27 22:49:39,480 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 123 flow [2024-06-27 22:49:39,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:49:39,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:49:39,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:49:39,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 22:49:39,482 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 22:49:39,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:49:39,483 INFO L85 PathProgramCache]: Analyzing trace with hash -69448572, now seen corresponding path program 1 times [2024-06-27 22:49:39,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:49:39,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313939015] [2024-06-27 22:49:39,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:49:39,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:49:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:49:39,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:49:39,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:49:39,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313939015] [2024-06-27 22:49:39,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313939015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:49:39,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:49:39,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 22:49:39,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73961547] [2024-06-27 22:49:39,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:49:39,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 22:49:39,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:49:39,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 22:49:39,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 22:49:39,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:49:39,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 123 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:49:39,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:49:39,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:49:39,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:49:40,271 INFO L124 PetriNetUnfolderBase]: 1680/2795 cut-off events. [2024-06-27 22:49:40,271 INFO L125 PetriNetUnfolderBase]: For 524/524 co-relation queries the response was YES. [2024-06-27 22:49:40,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6063 conditions, 2795 events. 1680/2795 cut-off events. For 524/524 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16675 event pairs, 618 based on Foata normal form. 10/2791 useless extension candidates. Maximal degree in co-relation 6051. Up to 2346 conditions per place. [2024-06-27 22:49:40,286 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 42 selfloop transitions, 6 changer transitions 0/58 dead transitions. [2024-06-27 22:49:40,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 58 transitions, 255 flow [2024-06-27 22:49:40,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 22:49:40,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 22:49:40,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-06-27 22:49:40,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.644927536231884 [2024-06-27 22:49:40,290 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 123 flow. Second operand 3 states and 89 transitions. [2024-06-27 22:49:40,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 58 transitions, 255 flow [2024-06-27 22:49:40,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 58 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 22:49:40,293 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 152 flow [2024-06-27 22:49:40,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2024-06-27 22:49:40,295 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2024-06-27 22:49:40,295 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 152 flow [2024-06-27 22:49:40,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:49:40,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:49:40,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:49:40,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 22:49:40,300 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 22:49:40,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:49:40,302 INFO L85 PathProgramCache]: Analyzing trace with hash -378534321, now seen corresponding path program 1 times [2024-06-27 22:49:40,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:49:40,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117487736] [2024-06-27 22:49:40,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:49:40,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:49:40,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:49:40,408 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 22:49:40,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:49:40,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117487736] [2024-06-27 22:49:40,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117487736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:49:40,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:49:40,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 22:49:40,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156250952] [2024-06-27 22:49:40,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:49:40,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 22:49:40,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:49:40,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 22:49:40,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 22:49:40,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-06-27 22:49:40,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 152 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 22:49:40,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:49:40,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-06-27 22:49:40,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:49:40,709 INFO L124 PetriNetUnfolderBase]: 1213/2042 cut-off events. [2024-06-27 22:49:40,710 INFO L125 PetriNetUnfolderBase]: For 732/732 co-relation queries the response was YES. [2024-06-27 22:49:40,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4900 conditions, 2042 events. 1213/2042 cut-off events. For 732/732 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 12304 event pairs, 521 based on Foata normal form. 2/2027 useless extension candidates. Maximal degree in co-relation 4886. Up to 1722 conditions per place. [2024-06-27 22:49:40,719 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 60 selfloop transitions, 11 changer transitions 0/82 dead transitions. [2024-06-27 22:49:40,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 82 transitions, 400 flow [2024-06-27 22:49:40,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 22:49:40,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 22:49:40,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-27 22:49:40,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6847826086956522 [2024-06-27 22:49:40,721 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 152 flow. Second operand 4 states and 126 transitions. [2024-06-27 22:49:40,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 82 transitions, 400 flow [2024-06-27 22:49:40,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 82 transitions, 394 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 22:49:40,723 INFO L231 Difference]: Finished difference. Result has 55 places, 53 transitions, 227 flow [2024-06-27 22:49:40,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=227, PETRI_PLACES=55, PETRI_TRANSITIONS=53} [2024-06-27 22:49:40,724 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2024-06-27 22:49:40,724 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 53 transitions, 227 flow [2024-06-27 22:49:40,724 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 22:49:40,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:49:40,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:49:40,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 22:49:40,725 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 22:49:40,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:49:40,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1164222356, now seen corresponding path program 1 times [2024-06-27 22:49:40,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:49:40,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447393499] [2024-06-27 22:49:40,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:49:40,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:49:40,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:49:40,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:49:40,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:49:40,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447393499] [2024-06-27 22:49:40,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447393499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:49:40,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:49:40,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 22:49:40,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162811882] [2024-06-27 22:49:40,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:49:40,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 22:49:40,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:49:40,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 22:49:40,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-27 22:49:40,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-06-27 22:49:40,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 53 transitions, 227 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 22:49:40,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:49:40,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-06-27 22:49:40,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:49:41,269 INFO L124 PetriNetUnfolderBase]: 1205/2028 cut-off events. [2024-06-27 22:49:41,269 INFO L125 PetriNetUnfolderBase]: For 1823/1823 co-relation queries the response was YES. [2024-06-27 22:49:41,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5588 conditions, 2028 events. 1205/2028 cut-off events. For 1823/1823 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 12177 event pairs, 525 based on Foata normal form. 4/2013 useless extension candidates. Maximal degree in co-relation 5571. Up to 1716 conditions per place. [2024-06-27 22:49:41,281 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 58 selfloop transitions, 11 changer transitions 0/80 dead transitions. [2024-06-27 22:49:41,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 80 transitions, 433 flow [2024-06-27 22:49:41,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 22:49:41,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 22:49:41,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-06-27 22:49:41,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6739130434782609 [2024-06-27 22:49:41,282 INFO L175 Difference]: Start difference. First operand has 55 places, 53 transitions, 227 flow. Second operand 4 states and 124 transitions. [2024-06-27 22:49:41,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 80 transitions, 433 flow [2024-06-27 22:49:41,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 80 transitions, 425 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-27 22:49:41,286 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 254 flow [2024-06-27 22:49:41,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=59, PETRI_TRANSITIONS=53} [2024-06-27 22:49:41,286 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 9 predicate places. [2024-06-27 22:49:41,287 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 254 flow [2024-06-27 22:49:41,287 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 22:49:41,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:49:41,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:49:41,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 22:49:41,287 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 22:49:41,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:49:41,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1465422487, now seen corresponding path program 1 times [2024-06-27 22:49:41,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:49:41,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978564612] [2024-06-27 22:49:41,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:49:41,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:49:41,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:49:41,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:49:41,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:49:41,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978564612] [2024-06-27 22:49:41,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978564612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:49:41,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:49:41,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:49:41,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165360604] [2024-06-27 22:49:41,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:49:41,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:49:41,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:49:41,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:49:41,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:49:41,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:49:41,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 254 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:49:41,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:49:41,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:49:41,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:49:41,947 INFO L124 PetriNetUnfolderBase]: 2088/3455 cut-off events. [2024-06-27 22:49:41,947 INFO L125 PetriNetUnfolderBase]: For 3401/3401 co-relation queries the response was YES. [2024-06-27 22:49:41,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9596 conditions, 3455 events. 2088/3455 cut-off events. For 3401/3401 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 21589 event pairs, 213 based on Foata normal form. 8/3430 useless extension candidates. Maximal degree in co-relation 9576. Up to 2236 conditions per place. [2024-06-27 22:49:41,966 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 77 selfloop transitions, 21 changer transitions 0/108 dead transitions. [2024-06-27 22:49:41,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 108 transitions, 650 flow [2024-06-27 22:49:41,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:49:41,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:49:41,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-27 22:49:41,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6739130434782609 [2024-06-27 22:49:41,972 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 254 flow. Second operand 5 states and 155 transitions. [2024-06-27 22:49:41,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 108 transitions, 650 flow [2024-06-27 22:49:41,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 108 transitions, 624 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 22:49:41,978 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 399 flow [2024-06-27 22:49:41,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=399, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2024-06-27 22:49:41,980 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 13 predicate places. [2024-06-27 22:49:41,980 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 399 flow [2024-06-27 22:49:41,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:49:41,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:49:41,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:49:41,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 22:49:41,981 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 22:49:41,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:49:41,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1465542457, now seen corresponding path program 2 times [2024-06-27 22:49:41,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:49:41,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033093248] [2024-06-27 22:49:41,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:49:41,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:49:42,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:49:42,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:49:42,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:49:42,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033093248] [2024-06-27 22:49:42,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033093248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:49:42,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:49:42,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:49:42,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464460789] [2024-06-27 22:49:42,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:49:42,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:49:42,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:49:42,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:49:42,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:49:42,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:49:42,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 399 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:49:42,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:49:42,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:49:42,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:49:42,763 INFO L124 PetriNetUnfolderBase]: 2163/3530 cut-off events. [2024-06-27 22:49:42,764 INFO L125 PetriNetUnfolderBase]: For 7036/7036 co-relation queries the response was YES. [2024-06-27 22:49:42,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11755 conditions, 3530 events. 2163/3530 cut-off events. For 7036/7036 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 22004 event pairs, 612 based on Foata normal form. 6/3492 useless extension candidates. Maximal degree in co-relation 11732. Up to 1607 conditions per place. [2024-06-27 22:49:42,790 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 77 selfloop transitions, 23 changer transitions 0/110 dead transitions. [2024-06-27 22:49:42,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 110 transitions, 781 flow [2024-06-27 22:49:42,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:49:42,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:49:42,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-27 22:49:42,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6434782608695652 [2024-06-27 22:49:42,792 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 399 flow. Second operand 5 states and 148 transitions. [2024-06-27 22:49:42,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 110 transitions, 781 flow [2024-06-27 22:49:42,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 110 transitions, 747 flow, removed 17 selfloop flow, removed 0 redundant places. [2024-06-27 22:49:42,804 INFO L231 Difference]: Finished difference. Result has 69 places, 72 transitions, 508 flow [2024-06-27 22:49:42,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=508, PETRI_PLACES=69, PETRI_TRANSITIONS=72} [2024-06-27 22:49:42,806 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 19 predicate places. [2024-06-27 22:49:42,806 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 72 transitions, 508 flow [2024-06-27 22:49:42,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:49:42,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:49:42,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:49:42,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 22:49:42,807 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 22:49:42,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:49:42,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1598986630, now seen corresponding path program 1 times [2024-06-27 22:49:42,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:49:42,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279987777] [2024-06-27 22:49:42,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:49:42,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:49:42,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:49:43,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:49:43,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:49:43,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279987777] [2024-06-27 22:49:43,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279987777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:49:43,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:49:43,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:49:43,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800046561] [2024-06-27 22:49:43,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:49:43,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:49:43,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:49:43,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:49:43,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:49:43,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:49:43,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 72 transitions, 508 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 22:49:43,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:49:43,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:49:43,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:49:43,717 INFO L124 PetriNetUnfolderBase]: 2375/3966 cut-off events. [2024-06-27 22:49:43,718 INFO L125 PetriNetUnfolderBase]: For 10114/10114 co-relation queries the response was YES. [2024-06-27 22:49:43,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14252 conditions, 3966 events. 2375/3966 cut-off events. For 10114/10114 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 25469 event pairs, 238 based on Foata normal form. 16/3953 useless extension candidates. Maximal degree in co-relation 14225. Up to 2629 conditions per place. [2024-06-27 22:49:43,741 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 79 selfloop transitions, 31 changer transitions 0/120 dead transitions. [2024-06-27 22:49:43,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 120 transitions, 989 flow [2024-06-27 22:49:43,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:49:43,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:49:43,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-06-27 22:49:43,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260869565217392 [2024-06-27 22:49:43,743 INFO L175 Difference]: Start difference. First operand has 69 places, 72 transitions, 508 flow. Second operand 5 states and 144 transitions. [2024-06-27 22:49:43,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 120 transitions, 989 flow [2024-06-27 22:49:43,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 120 transitions, 969 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-27 22:49:43,765 INFO L231 Difference]: Finished difference. Result has 74 places, 88 transitions, 770 flow [2024-06-27 22:49:43,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=770, PETRI_PLACES=74, PETRI_TRANSITIONS=88} [2024-06-27 22:49:43,767 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 24 predicate places. [2024-06-27 22:49:43,767 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 88 transitions, 770 flow [2024-06-27 22:49:43,767 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 22:49:43,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:49:43,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:49:43,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 22:49:43,768 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 22:49:43,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:49:43,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1812817130, now seen corresponding path program 2 times [2024-06-27 22:49:43,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:49:43,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502982177] [2024-06-27 22:49:43,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:49:43,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:49:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:49:44,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:49:44,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:49:44,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502982177] [2024-06-27 22:49:44,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502982177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:49:44,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:49:44,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:49:44,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041522775] [2024-06-27 22:49:44,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:49:44,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:49:44,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:49:44,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:49:44,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:49:44,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:49:44,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 88 transitions, 770 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 22:49:44,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:49:44,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:49:44,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:49:44,823 INFO L124 PetriNetUnfolderBase]: 2493/4172 cut-off events. [2024-06-27 22:49:44,824 INFO L125 PetriNetUnfolderBase]: For 14342/14342 co-relation queries the response was YES. [2024-06-27 22:49:44,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15772 conditions, 4172 events. 2493/4172 cut-off events. For 14342/14342 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 27196 event pairs, 340 based on Foata normal form. 12/4158 useless extension candidates. Maximal degree in co-relation 15742. Up to 1731 conditions per place. [2024-06-27 22:49:44,845 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 86 selfloop transitions, 34 changer transitions 0/130 dead transitions. [2024-06-27 22:49:44,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 130 transitions, 1172 flow [2024-06-27 22:49:44,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:49:44,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:49:44,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-27 22:49:44,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6434782608695652 [2024-06-27 22:49:44,847 INFO L175 Difference]: Start difference. First operand has 74 places, 88 transitions, 770 flow. Second operand 5 states and 148 transitions. [2024-06-27 22:49:44,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 130 transitions, 1172 flow [2024-06-27 22:49:44,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 130 transitions, 1122 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-27 22:49:44,871 INFO L231 Difference]: Finished difference. Result has 78 places, 92 transitions, 872 flow [2024-06-27 22:49:44,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=872, PETRI_PLACES=78, PETRI_TRANSITIONS=92} [2024-06-27 22:49:44,872 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 28 predicate places. [2024-06-27 22:49:44,872 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 92 transitions, 872 flow [2024-06-27 22:49:44,873 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 22:49:44,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:49:44,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:49:44,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 22:49:44,873 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:49:44,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:49:44,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1323720331, now seen corresponding path program 1 times [2024-06-27 22:49:44,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:49:44,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265585727] [2024-06-27 22:49:44,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:49:44,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:49:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:49:45,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:49:45,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:49:45,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265585727] [2024-06-27 22:49:45,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265585727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:49:45,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:49:45,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 22:49:45,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367507972] [2024-06-27 22:49:45,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:49:45,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 22:49:45,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:49:45,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 22:49:45,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 22:49:45,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:49:45,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 92 transitions, 872 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:49:45,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:49:45,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:49:45,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:49:45,554 INFO L124 PetriNetUnfolderBase]: 2485/4205 cut-off events. [2024-06-27 22:49:45,554 INFO L125 PetriNetUnfolderBase]: For 17291/17291 co-relation queries the response was YES. [2024-06-27 22:49:45,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16703 conditions, 4205 events. 2485/4205 cut-off events. For 17291/17291 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 27612 event pairs, 705 based on Foata normal form. 3/4202 useless extension candidates. Maximal degree in co-relation 16670. Up to 3602 conditions per place. [2024-06-27 22:49:45,579 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 108 selfloop transitions, 12 changer transitions 0/130 dead transitions. [2024-06-27 22:49:45,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 130 transitions, 1359 flow [2024-06-27 22:49:45,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 22:49:45,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 22:49:45,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2024-06-27 22:49:45,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 22:49:45,580 INFO L175 Difference]: Start difference. First operand has 78 places, 92 transitions, 872 flow. Second operand 4 states and 115 transitions. [2024-06-27 22:49:45,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 130 transitions, 1359 flow [2024-06-27 22:49:45,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 130 transitions, 1341 flow, removed 9 selfloop flow, removed 0 redundant places. [2024-06-27 22:49:45,616 INFO L231 Difference]: Finished difference. Result has 83 places, 103 transitions, 1063 flow [2024-06-27 22:49:45,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1063, PETRI_PLACES=83, PETRI_TRANSITIONS=103} [2024-06-27 22:49:45,617 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 33 predicate places. [2024-06-27 22:49:45,617 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 103 transitions, 1063 flow [2024-06-27 22:49:45,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:49:45,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:49:45,617 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 22:49:45,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 22:49:45,618 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:49:45,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:49:45,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1365294510, now seen corresponding path program 1 times [2024-06-27 22:49:45,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:49:45,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804442914] [2024-06-27 22:49:45,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:49:45,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:49:45,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:49:45,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:49:45,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:49:45,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804442914] [2024-06-27 22:49:45,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804442914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:49:45,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:49:45,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 22:49:45,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152249124] [2024-06-27 22:49:45,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:49:45,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 22:49:45,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:49:45,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 22:49:45,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 22:49:45,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-06-27 22:49:45,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 103 transitions, 1063 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 22:49:45,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:49:45,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-06-27 22:49:45,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:49:46,397 INFO L124 PetriNetUnfolderBase]: 2245/3939 cut-off events. [2024-06-27 22:49:46,397 INFO L125 PetriNetUnfolderBase]: For 19299/19299 co-relation queries the response was YES. [2024-06-27 22:49:46,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16284 conditions, 3939 events. 2245/3939 cut-off events. For 19299/19299 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 26896 event pairs, 693 based on Foata normal form. 2/3927 useless extension candidates. Maximal degree in co-relation 16247. Up to 2875 conditions per place. [2024-06-27 22:49:46,425 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 99 selfloop transitions, 46 changer transitions 0/158 dead transitions. [2024-06-27 22:49:46,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 158 transitions, 1742 flow [2024-06-27 22:49:46,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:49:46,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:49:46,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-27 22:49:46,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-27 22:49:46,426 INFO L175 Difference]: Start difference. First operand has 83 places, 103 transitions, 1063 flow. Second operand 5 states and 150 transitions. [2024-06-27 22:49:46,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 158 transitions, 1742 flow [2024-06-27 22:49:46,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 158 transitions, 1738 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 22:49:46,461 INFO L231 Difference]: Finished difference. Result has 90 places, 122 transitions, 1511 flow [2024-06-27 22:49:46,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1059, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1511, PETRI_PLACES=90, PETRI_TRANSITIONS=122} [2024-06-27 22:49:46,462 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 40 predicate places. [2024-06-27 22:49:46,462 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 122 transitions, 1511 flow [2024-06-27 22:49:46,462 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 22:49:46,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:49:46,463 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 22:49:46,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 22:49:46,463 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:49:46,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:49:46,463 INFO L85 PathProgramCache]: Analyzing trace with hash -777847372, now seen corresponding path program 1 times [2024-06-27 22:49:46,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:49:46,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200565835] [2024-06-27 22:49:46,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:49:46,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:49:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:49:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:49:46,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:49:46,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200565835] [2024-06-27 22:49:46,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200565835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:49:46,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:49:46,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:49:46,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429270755] [2024-06-27 22:49:46,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:49:46,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:49:46,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:49:46,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:49:46,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:49:46,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:49:46,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 122 transitions, 1511 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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 22:49:46,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:49:46,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:49:46,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:49:47,155 INFO L124 PetriNetUnfolderBase]: 2516/4210 cut-off events. [2024-06-27 22:49:47,156 INFO L125 PetriNetUnfolderBase]: For 23978/23978 co-relation queries the response was YES. [2024-06-27 22:49:47,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18686 conditions, 4210 events. 2516/4210 cut-off events. For 23978/23978 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 27676 event pairs, 592 based on Foata normal form. 3/4199 useless extension candidates. Maximal degree in co-relation 18644. Up to 3545 conditions per place. [2024-06-27 22:49:47,184 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 118 selfloop transitions, 17 changer transitions 0/145 dead transitions. [2024-06-27 22:49:47,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 145 transitions, 1909 flow [2024-06-27 22:49:47,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 22:49:47,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 22:49:47,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-06-27 22:49:47,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978260869565217 [2024-06-27 22:49:47,186 INFO L175 Difference]: Start difference. First operand has 90 places, 122 transitions, 1511 flow. Second operand 4 states and 110 transitions. [2024-06-27 22:49:47,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 145 transitions, 1909 flow [2024-06-27 22:49:47,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 145 transitions, 1845 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-27 22:49:47,227 INFO L231 Difference]: Finished difference. Result has 93 places, 128 transitions, 1567 flow [2024-06-27 22:49:47,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1448, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1567, PETRI_PLACES=93, PETRI_TRANSITIONS=128} [2024-06-27 22:49:47,228 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 43 predicate places. [2024-06-27 22:49:47,228 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 128 transitions, 1567 flow [2024-06-27 22:49:47,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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 22:49:47,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:49:47,229 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 22:49:47,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 22:49:47,229 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:49:47,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:49:47,229 INFO L85 PathProgramCache]: Analyzing trace with hash -784870732, now seen corresponding path program 2 times [2024-06-27 22:49:47,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:49:47,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067977200] [2024-06-27 22:49:47,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:49:47,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:49:47,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:49:47,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:49:47,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:49:47,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067977200] [2024-06-27 22:49:47,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067977200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:49:47,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:49:47,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:49:47,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109204159] [2024-06-27 22:49:47,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:49:47,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:49:47,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:49:47,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:49:47,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:49:47,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:49:47,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 128 transitions, 1567 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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 22:49:47,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:49:47,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:49:47,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:49:47,971 INFO L124 PetriNetUnfolderBase]: 2657/4454 cut-off events. [2024-06-27 22:49:47,972 INFO L125 PetriNetUnfolderBase]: For 27329/27329 co-relation queries the response was YES. [2024-06-27 22:49:47,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19895 conditions, 4454 events. 2657/4454 cut-off events. For 27329/27329 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 29499 event pairs, 475 based on Foata normal form. 9/4448 useless extension candidates. Maximal degree in co-relation 19851. Up to 3243 conditions per place. [2024-06-27 22:49:48,003 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 125 selfloop transitions, 30 changer transitions 0/165 dead transitions. [2024-06-27 22:49:48,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 165 transitions, 2083 flow [2024-06-27 22:49:48,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:49:48,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:49:48,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-06-27 22:49:48,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6130434782608696 [2024-06-27 22:49:48,005 INFO L175 Difference]: Start difference. First operand has 93 places, 128 transitions, 1567 flow. Second operand 5 states and 141 transitions. [2024-06-27 22:49:48,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 165 transitions, 2083 flow [2024-06-27 22:49:48,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 165 transitions, 2016 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-27 22:49:48,057 INFO L231 Difference]: Finished difference. Result has 96 places, 129 transitions, 1579 flow [2024-06-27 22:49:48,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1500, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1579, PETRI_PLACES=96, PETRI_TRANSITIONS=129} [2024-06-27 22:49:48,058 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 46 predicate places. [2024-06-27 22:49:48,058 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 129 transitions, 1579 flow [2024-06-27 22:49:48,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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 22:49:48,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:49:48,058 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 22:49:48,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 22:49:48,059 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:49:48,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:49:48,059 INFO L85 PathProgramCache]: Analyzing trace with hash -625631621, now seen corresponding path program 1 times [2024-06-27 22:49:48,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:49:48,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477135381] [2024-06-27 22:49:48,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:49:48,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:49:48,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:49:48,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:49:48,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:49:48,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477135381] [2024-06-27 22:49:48,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477135381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:49:48,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:49:48,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:49:48,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41712232] [2024-06-27 22:49:48,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:49:48,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:49:48,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:49:48,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:49:48,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:49:48,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-06-27 22:49:48,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 129 transitions, 1579 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 22:49:48,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:49:48,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-06-27 22:49:48,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:49:48,947 INFO L124 PetriNetUnfolderBase]: 2418/4234 cut-off events. [2024-06-27 22:49:48,947 INFO L125 PetriNetUnfolderBase]: For 29140/29140 co-relation queries the response was YES. [2024-06-27 22:49:48,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19176 conditions, 4234 events. 2418/4234 cut-off events. For 29140/29140 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 29027 event pairs, 602 based on Foata normal form. 4/4223 useless extension candidates. Maximal degree in co-relation 19131. Up to 3119 conditions per place. [2024-06-27 22:49:48,979 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 106 selfloop transitions, 46 changer transitions 0/166 dead transitions. [2024-06-27 22:49:48,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 166 transitions, 2001 flow [2024-06-27 22:49:48,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:49:48,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:49:48,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-27 22:49:48,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6565217391304348 [2024-06-27 22:49:48,981 INFO L175 Difference]: Start difference. First operand has 96 places, 129 transitions, 1579 flow. Second operand 5 states and 151 transitions. [2024-06-27 22:49:48,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 166 transitions, 2001 flow [2024-06-27 22:49:49,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 166 transitions, 1926 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 22:49:49,032 INFO L231 Difference]: Finished difference. Result has 99 places, 131 transitions, 1665 flow [2024-06-27 22:49:49,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1504, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1665, PETRI_PLACES=99, PETRI_TRANSITIONS=131} [2024-06-27 22:49:49,033 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 49 predicate places. [2024-06-27 22:49:49,034 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 131 transitions, 1665 flow [2024-06-27 22:49:49,034 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 22:49:49,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:49:49,034 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 22:49:49,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 22:49:49,034 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 22:49:49,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:49:49,035 INFO L85 PathProgramCache]: Analyzing trace with hash -758162930, now seen corresponding path program 1 times [2024-06-27 22:49:49,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:49:49,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214268412] [2024-06-27 22:49:49,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:49:49,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:49:49,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:49:49,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:49:49,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:49:49,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214268412] [2024-06-27 22:49:49,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214268412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:49:49,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:49:49,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:49:49,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570764890] [2024-06-27 22:49:49,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:49:49,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:49:49,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:49:49,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:49:49,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:49:49,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:49:49,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 131 transitions, 1665 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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 22:49:49,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:49:49,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:49:49,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:49:49,912 INFO L124 PetriNetUnfolderBase]: 2717/4553 cut-off events. [2024-06-27 22:49:49,912 INFO L125 PetriNetUnfolderBase]: For 29022/29022 co-relation queries the response was YES. [2024-06-27 22:49:49,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20358 conditions, 4553 events. 2717/4553 cut-off events. For 29022/29022 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 29842 event pairs, 840 based on Foata normal form. 1/4527 useless extension candidates. Maximal degree in co-relation 20312. Up to 3344 conditions per place. [2024-06-27 22:49:49,936 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 170 selfloop transitions, 29 changer transitions 0/209 dead transitions. [2024-06-27 22:49:49,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 209 transitions, 2660 flow [2024-06-27 22:49:49,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:49:49,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:49:49,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-06-27 22:49:49,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-06-27 22:49:49,938 INFO L175 Difference]: Start difference. First operand has 99 places, 131 transitions, 1665 flow. Second operand 6 states and 174 transitions. [2024-06-27 22:49:49,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 209 transitions, 2660 flow [2024-06-27 22:49:49,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 209 transitions, 2581 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-27 22:49:49,984 INFO L231 Difference]: Finished difference. Result has 106 places, 148 transitions, 1934 flow [2024-06-27 22:49:49,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1608, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1934, PETRI_PLACES=106, PETRI_TRANSITIONS=148} [2024-06-27 22:49:49,985 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 56 predicate places. [2024-06-27 22:49:49,985 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 148 transitions, 1934 flow [2024-06-27 22:49:49,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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 22:49:49,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:49:49,985 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 22:49:49,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 22:49:49,986 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:49:49,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:49:49,986 INFO L85 PathProgramCache]: Analyzing trace with hash -784864780, now seen corresponding path program 2 times [2024-06-27 22:49:49,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:49:49,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135624369] [2024-06-27 22:49:49,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:49:49,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:49:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:49:50,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:49:50,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:49:50,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135624369] [2024-06-27 22:49:50,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135624369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:49:50,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:49:50,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:49:50,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118016745] [2024-06-27 22:49:50,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:49:50,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:49:50,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:49:50,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:49:50,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:49:50,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:49:50,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 148 transitions, 1934 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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 22:49:50,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:49:50,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:49:50,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:49:50,780 INFO L124 PetriNetUnfolderBase]: 2939/4974 cut-off events. [2024-06-27 22:49:50,780 INFO L125 PetriNetUnfolderBase]: For 34331/34331 co-relation queries the response was YES. [2024-06-27 22:49:50,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22747 conditions, 4974 events. 2939/4974 cut-off events. For 34331/34331 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 33395 event pairs, 806 based on Foata normal form. 3/4956 useless extension candidates. Maximal degree in co-relation 22697. Up to 3817 conditions per place. [2024-06-27 22:49:50,809 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 181 selfloop transitions, 27 changer transitions 0/218 dead transitions. [2024-06-27 22:49:50,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 218 transitions, 2797 flow [2024-06-27 22:49:50,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:49:50,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:49:50,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-06-27 22:49:50,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195652173913043 [2024-06-27 22:49:50,811 INFO L175 Difference]: Start difference. First operand has 106 places, 148 transitions, 1934 flow. Second operand 6 states and 171 transitions. [2024-06-27 22:49:50,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 218 transitions, 2797 flow [2024-06-27 22:49:50,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 218 transitions, 2745 flow, removed 18 selfloop flow, removed 1 redundant places. [2024-06-27 22:49:50,872 INFO L231 Difference]: Finished difference. Result has 114 places, 168 transitions, 2225 flow [2024-06-27 22:49:50,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1896, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2225, PETRI_PLACES=114, PETRI_TRANSITIONS=168} [2024-06-27 22:49:50,873 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 64 predicate places. [2024-06-27 22:49:50,873 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 168 transitions, 2225 flow [2024-06-27 22:49:50,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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 22:49:50,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:49:50,874 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 22:49:50,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 22:49:50,874 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 22:49:50,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:49:50,874 INFO L85 PathProgramCache]: Analyzing trace with hash -754443860, now seen corresponding path program 3 times [2024-06-27 22:49:50,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:49:50,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568089251] [2024-06-27 22:49:50,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:49:50,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:49:50,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:49:50,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:49:50,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:49:50,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568089251] [2024-06-27 22:49:50,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568089251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:49:50,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:49:50,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:49:50,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296602548] [2024-06-27 22:49:50,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:49:50,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:49:50,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:49:50,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:49:50,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:49:50,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:49:50,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 168 transitions, 2225 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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 22:49:50,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:49:50,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:49:50,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:49:51,675 INFO L124 PetriNetUnfolderBase]: 2936/4966 cut-off events. [2024-06-27 22:49:51,675 INFO L125 PetriNetUnfolderBase]: For 37197/37197 co-relation queries the response was YES. [2024-06-27 22:49:51,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23277 conditions, 4966 events. 2936/4966 cut-off events. For 37197/37197 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 33331 event pairs, 822 based on Foata normal form. 1/4946 useless extension candidates. Maximal degree in co-relation 23222. Up to 3816 conditions per place. [2024-06-27 22:49:51,705 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 177 selfloop transitions, 33 changer transitions 0/220 dead transitions. [2024-06-27 22:49:51,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 220 transitions, 2879 flow [2024-06-27 22:49:51,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:49:51,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:49:51,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-27 22:49:51,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2024-06-27 22:49:51,707 INFO L175 Difference]: Start difference. First operand has 114 places, 168 transitions, 2225 flow. Second operand 6 states and 176 transitions. [2024-06-27 22:49:51,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 220 transitions, 2879 flow [2024-06-27 22:49:51,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 220 transitions, 2839 flow, removed 20 selfloop flow, removed 0 redundant places. [2024-06-27 22:49:51,777 INFO L231 Difference]: Finished difference. Result has 121 places, 171 transitions, 2321 flow [2024-06-27 22:49:51,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2189, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2321, PETRI_PLACES=121, PETRI_TRANSITIONS=171} [2024-06-27 22:49:51,778 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 71 predicate places. [2024-06-27 22:49:51,778 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 171 transitions, 2321 flow [2024-06-27 22:49:51,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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 22:49:51,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:49:51,778 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 22:49:51,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 22:49:51,778 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 22:49:51,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:49:51,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1516931931, now seen corresponding path program 1 times [2024-06-27 22:49:51,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:49:51,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206164561] [2024-06-27 22:49:51,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:49:51,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:49:51,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:49:51,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:49:51,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:49:51,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206164561] [2024-06-27 22:49:51,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206164561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:49:51,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:49:51,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:49:51,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704721948] [2024-06-27 22:49:51,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:49:51,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:49:51,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:49:51,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:49:51,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:49:51,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:49:51,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 171 transitions, 2321 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:49:51,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:49:51,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:49:51,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:49:52,900 INFO L124 PetriNetUnfolderBase]: 3728/6464 cut-off events. [2024-06-27 22:49:52,900 INFO L125 PetriNetUnfolderBase]: For 55925/55957 co-relation queries the response was YES. [2024-06-27 22:49:52,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29341 conditions, 6464 events. 3728/6464 cut-off events. For 55925/55957 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 47752 event pairs, 1092 based on Foata normal form. 28/6457 useless extension candidates. Maximal degree in co-relation 29282. Up to 1977 conditions per place. [2024-06-27 22:49:52,954 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 153 selfloop transitions, 47 changer transitions 0/210 dead transitions. [2024-06-27 22:49:52,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 210 transitions, 2977 flow [2024-06-27 22:49:52,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:49:52,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:49:52,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-06-27 22:49:52,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6130434782608696 [2024-06-27 22:49:52,956 INFO L175 Difference]: Start difference. First operand has 121 places, 171 transitions, 2321 flow. Second operand 5 states and 141 transitions. [2024-06-27 22:49:52,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 210 transitions, 2977 flow [2024-06-27 22:49:53,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 210 transitions, 2940 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 22:49:53,038 INFO L231 Difference]: Finished difference. Result has 125 places, 178 transitions, 2532 flow [2024-06-27 22:49:53,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2284, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2532, PETRI_PLACES=125, PETRI_TRANSITIONS=178} [2024-06-27 22:49:53,039 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 75 predicate places. [2024-06-27 22:49:53,039 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 178 transitions, 2532 flow [2024-06-27 22:49:53,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:49:53,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:49:53,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:49:53,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 22:49:53,040 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 22:49:53,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:49:53,040 INFO L85 PathProgramCache]: Analyzing trace with hash 96959761, now seen corresponding path program 1 times [2024-06-27 22:49:53,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:49:53,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307977858] [2024-06-27 22:49:53,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:49:53,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:49:53,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:49:53,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:49:53,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:49:53,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307977858] [2024-06-27 22:49:53,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307977858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:49:53,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:49:53,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:49:53,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007377963] [2024-06-27 22:49:53,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:49:53,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:49:53,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:49:53,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:49:53,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:49:53,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:49:53,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 178 transitions, 2532 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:49:53,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:49:53,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:49:53,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:49:54,120 INFO L124 PetriNetUnfolderBase]: 3711/6427 cut-off events. [2024-06-27 22:49:54,121 INFO L125 PetriNetUnfolderBase]: For 62028/62028 co-relation queries the response was YES. [2024-06-27 22:49:54,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31137 conditions, 6427 events. 3711/6427 cut-off events. For 62028/62028 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 46983 event pairs, 1056 based on Foata normal form. 6/6373 useless extension candidates. Maximal degree in co-relation 31076. Up to 4967 conditions per place. [2024-06-27 22:49:54,168 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 162 selfloop transitions, 32 changer transitions 0/204 dead transitions. [2024-06-27 22:49:54,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 204 transitions, 3085 flow [2024-06-27 22:49:54,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 22:49:54,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 22:49:54,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2024-06-27 22:49:54,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 22:49:54,169 INFO L175 Difference]: Start difference. First operand has 125 places, 178 transitions, 2532 flow. Second operand 4 states and 115 transitions. [2024-06-27 22:49:54,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 204 transitions, 3085 flow [2024-06-27 22:49:54,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 204 transitions, 2953 flow, removed 45 selfloop flow, removed 2 redundant places. [2024-06-27 22:49:54,346 INFO L231 Difference]: Finished difference. Result has 127 places, 178 transitions, 2520 flow [2024-06-27 22:49:54,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2436, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2520, PETRI_PLACES=127, PETRI_TRANSITIONS=178} [2024-06-27 22:49:54,346 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 77 predicate places. [2024-06-27 22:49:54,346 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 178 transitions, 2520 flow [2024-06-27 22:49:54,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:49:54,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:49:54,346 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 22:49:54,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 22:49:54,347 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 22:49:54,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:49:54,347 INFO L85 PathProgramCache]: Analyzing trace with hash 2082939313, now seen corresponding path program 1 times [2024-06-27 22:49:54,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:49:54,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068315386] [2024-06-27 22:49:54,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:49:54,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:49:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:49:54,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:49:54,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:49:54,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068315386] [2024-06-27 22:49:54,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068315386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:49:54,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:49:54,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:49:54,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466882740] [2024-06-27 22:49:54,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:49:54,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:49:54,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:49:54,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:49:54,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:49:54,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:49:54,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 178 transitions, 2520 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:49:54,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:49:54,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:49:54,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:49:55,648 INFO L124 PetriNetUnfolderBase]: 3831/6690 cut-off events. [2024-06-27 22:49:55,648 INFO L125 PetriNetUnfolderBase]: For 57254/57254 co-relation queries the response was YES. [2024-06-27 22:49:55,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30771 conditions, 6690 events. 3831/6690 cut-off events. For 57254/57254 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 49727 event pairs, 1136 based on Foata normal form. 8/6639 useless extension candidates. Maximal degree in co-relation 30709. Up to 4716 conditions per place. [2024-06-27 22:49:55,701 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 190 selfloop transitions, 46 changer transitions 0/246 dead transitions. [2024-06-27 22:49:55,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 246 transitions, 3423 flow [2024-06-27 22:49:55,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:49:55,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:49:55,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-27 22:49:55,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-06-27 22:49:55,703 INFO L175 Difference]: Start difference. First operand has 127 places, 178 transitions, 2520 flow. Second operand 6 states and 177 transitions. [2024-06-27 22:49:55,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 246 transitions, 3423 flow [2024-06-27 22:49:55,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 246 transitions, 3355 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 22:49:55,806 INFO L231 Difference]: Finished difference. Result has 132 places, 189 transitions, 2739 flow [2024-06-27 22:49:55,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2454, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2739, PETRI_PLACES=132, PETRI_TRANSITIONS=189} [2024-06-27 22:49:55,806 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 82 predicate places. [2024-06-27 22:49:55,806 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 189 transitions, 2739 flow [2024-06-27 22:49:55,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:49:55,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:49:55,806 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 22:49:55,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 22:49:55,807 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 22:49:55,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:49:55,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1438997521, now seen corresponding path program 1 times [2024-06-27 22:49:55,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:49:55,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223695630] [2024-06-27 22:49:55,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:49:55,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:49:55,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:49:56,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:49:56,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:49:56,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223695630] [2024-06-27 22:49:56,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223695630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:49:56,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:49:56,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:49:56,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147279321] [2024-06-27 22:49:56,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:49:56,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:49:56,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:49:56,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:49:56,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:49:56,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:49:56,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 189 transitions, 2739 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:49:56,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:49:56,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:49:56,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:49:57,017 INFO L124 PetriNetUnfolderBase]: 4075/7135 cut-off events. [2024-06-27 22:49:57,017 INFO L125 PetriNetUnfolderBase]: For 62471/62471 co-relation queries the response was YES. [2024-06-27 22:49:57,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33472 conditions, 7135 events. 4075/7135 cut-off events. For 62471/62471 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 53517 event pairs, 1216 based on Foata normal form. 8/7089 useless extension candidates. Maximal degree in co-relation 33407. Up to 5162 conditions per place. [2024-06-27 22:49:57,074 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 208 selfloop transitions, 46 changer transitions 0/264 dead transitions. [2024-06-27 22:49:57,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 264 transitions, 3649 flow [2024-06-27 22:49:57,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 22:49:57,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 22:49:57,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-27 22:49:57,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6059782608695652 [2024-06-27 22:49:57,075 INFO L175 Difference]: Start difference. First operand has 132 places, 189 transitions, 2739 flow. Second operand 8 states and 223 transitions. [2024-06-27 22:49:57,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 264 transitions, 3649 flow [2024-06-27 22:49:57,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 264 transitions, 3591 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-06-27 22:49:57,219 INFO L231 Difference]: Finished difference. Result has 141 places, 197 transitions, 2926 flow [2024-06-27 22:49:57,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2689, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2926, PETRI_PLACES=141, PETRI_TRANSITIONS=197} [2024-06-27 22:49:57,219 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 91 predicate places. [2024-06-27 22:49:57,219 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 197 transitions, 2926 flow [2024-06-27 22:49:57,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:49:57,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:49:57,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:49:57,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 22:49:57,220 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 22:49:57,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:49:57,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1820442415, now seen corresponding path program 2 times [2024-06-27 22:49:57,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:49:57,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847646848] [2024-06-27 22:49:57,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:49:57,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:49:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:49:57,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:49:57,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:49:57,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847646848] [2024-06-27 22:49:57,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847646848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:49:57,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:49:57,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:49:57,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87115699] [2024-06-27 22:49:57,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:49:57,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:49:57,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:49:57,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:49:57,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:49:57,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:49:57,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 197 transitions, 2926 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:49:57,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:49:57,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:49:57,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:49:58,478 INFO L124 PetriNetUnfolderBase]: 4057/7115 cut-off events. [2024-06-27 22:49:58,478 INFO L125 PetriNetUnfolderBase]: For 64622/64622 co-relation queries the response was YES. [2024-06-27 22:49:58,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33285 conditions, 7115 events. 4057/7115 cut-off events. For 64622/64622 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 53438 event pairs, 1214 based on Foata normal form. 8/7069 useless extension candidates. Maximal degree in co-relation 33216. Up to 5154 conditions per place. [2024-06-27 22:49:58,609 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 196 selfloop transitions, 56 changer transitions 0/262 dead transitions. [2024-06-27 22:49:58,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 262 transitions, 3644 flow [2024-06-27 22:49:58,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 22:49:58,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 22:49:58,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-27 22:49:58,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6114130434782609 [2024-06-27 22:49:58,610 INFO L175 Difference]: Start difference. First operand has 141 places, 197 transitions, 2926 flow. Second operand 8 states and 225 transitions. [2024-06-27 22:49:58,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 262 transitions, 3644 flow [2024-06-27 22:49:58,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 262 transitions, 3576 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 22:49:58,727 INFO L231 Difference]: Finished difference. Result has 146 places, 197 transitions, 2991 flow [2024-06-27 22:49:58,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2858, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2991, PETRI_PLACES=146, PETRI_TRANSITIONS=197} [2024-06-27 22:49:58,728 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 96 predicate places. [2024-06-27 22:49:58,728 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 197 transitions, 2991 flow [2024-06-27 22:49:58,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:49:58,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:49:58,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:49:58,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 22:49:58,729 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 22:49:58,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:49:58,729 INFO L85 PathProgramCache]: Analyzing trace with hash -483122114, now seen corresponding path program 1 times [2024-06-27 22:49:58,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:49:58,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832347008] [2024-06-27 22:49:58,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:49:58,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:49:58,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:49:58,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:49:58,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:49:59,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832347008] [2024-06-27 22:49:59,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832347008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:49:59,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:49:59,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:49:59,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762632043] [2024-06-27 22:49:59,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:49:59,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:49:59,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:49:59,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:49:59,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:49:59,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:49:59,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 197 transitions, 2991 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:49:59,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:49:59,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:49:59,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:50:00,066 INFO L124 PetriNetUnfolderBase]: 4164/7209 cut-off events. [2024-06-27 22:50:00,066 INFO L125 PetriNetUnfolderBase]: For 67615/67615 co-relation queries the response was YES. [2024-06-27 22:50:00,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34335 conditions, 7209 events. 4164/7209 cut-off events. For 67615/67615 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 53969 event pairs, 882 based on Foata normal form. 2/7160 useless extension candidates. Maximal degree in co-relation 34265. Up to 4836 conditions per place. [2024-06-27 22:50:00,117 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 158 selfloop transitions, 82 changer transitions 0/250 dead transitions. [2024-06-27 22:50:00,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 250 transitions, 3780 flow [2024-06-27 22:50:00,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:50:00,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:50:00,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-27 22:50:00,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-06-27 22:50:00,118 INFO L175 Difference]: Start difference. First operand has 146 places, 197 transitions, 2991 flow. Second operand 6 states and 177 transitions. [2024-06-27 22:50:00,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 250 transitions, 3780 flow [2024-06-27 22:50:00,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 250 transitions, 3660 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 22:50:00,289 INFO L231 Difference]: Finished difference. Result has 148 places, 207 transitions, 3313 flow [2024-06-27 22:50:00,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2877, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3313, PETRI_PLACES=148, PETRI_TRANSITIONS=207} [2024-06-27 22:50:00,290 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 98 predicate places. [2024-06-27 22:50:00,290 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 207 transitions, 3313 flow [2024-06-27 22:50:00,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:00,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:50:00,290 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] [2024-06-27 22:50:00,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 22:50:00,291 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 22:50:00,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:50:00,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1262518835, now seen corresponding path program 1 times [2024-06-27 22:50:00,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:50:00,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45761428] [2024-06-27 22:50:00,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:50:00,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:50:00,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:50:00,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:50:00,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:50:00,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45761428] [2024-06-27 22:50:00,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45761428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:50:00,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:50:00,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:50:00,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773052587] [2024-06-27 22:50:00,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:50:00,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:50:00,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:50:00,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:50:00,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:50:00,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:50:00,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 207 transitions, 3313 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:00,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:50:00,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:50:00,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:50:01,687 INFO L124 PetriNetUnfolderBase]: 4238/7393 cut-off events. [2024-06-27 22:50:01,687 INFO L125 PetriNetUnfolderBase]: For 72203/72212 co-relation queries the response was YES. [2024-06-27 22:50:01,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35903 conditions, 7393 events. 4238/7393 cut-off events. For 72203/72212 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 55800 event pairs, 1076 based on Foata normal form. 7/7356 useless extension candidates. Maximal degree in co-relation 35831. Up to 4279 conditions per place. [2024-06-27 22:50:01,750 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 162 selfloop transitions, 106 changer transitions 0/278 dead transitions. [2024-06-27 22:50:01,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 278 transitions, 4278 flow [2024-06-27 22:50:01,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 22:50:01,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 22:50:01,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-27 22:50:01,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195652173913043 [2024-06-27 22:50:01,752 INFO L175 Difference]: Start difference. First operand has 148 places, 207 transitions, 3313 flow. Second operand 8 states and 228 transitions. [2024-06-27 22:50:01,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 278 transitions, 4278 flow [2024-06-27 22:50:01,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 278 transitions, 4199 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-27 22:50:01,951 INFO L231 Difference]: Finished difference. Result has 156 places, 217 transitions, 3712 flow [2024-06-27 22:50:01,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3239, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3712, PETRI_PLACES=156, PETRI_TRANSITIONS=217} [2024-06-27 22:50:01,951 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 106 predicate places. [2024-06-27 22:50:01,951 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 217 transitions, 3712 flow [2024-06-27 22:50:01,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:01,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:50:01,952 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 22:50:01,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 22:50:01,952 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 22:50:01,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:50:01,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1276915855, now seen corresponding path program 2 times [2024-06-27 22:50:01,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:50:01,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910940963] [2024-06-27 22:50:01,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:50:01,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:50:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:50:02,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:50:02,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:50:02,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910940963] [2024-06-27 22:50:02,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910940963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:50:02,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:50:02,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:50:02,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564242578] [2024-06-27 22:50:02,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:50:02,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:50:02,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:50:02,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:50:02,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:50:02,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:50:02,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 217 transitions, 3712 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:02,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:50:02,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:50:02,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:50:03,357 INFO L124 PetriNetUnfolderBase]: 4768/8251 cut-off events. [2024-06-27 22:50:03,357 INFO L125 PetriNetUnfolderBase]: For 99627/99636 co-relation queries the response was YES. [2024-06-27 22:50:03,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44949 conditions, 8251 events. 4768/8251 cut-off events. For 99627/99636 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 62210 event pairs, 1168 based on Foata normal form. 7/8216 useless extension candidates. Maximal degree in co-relation 44874. Up to 5815 conditions per place. [2024-06-27 22:50:03,424 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 221 selfloop transitions, 73 changer transitions 0/304 dead transitions. [2024-06-27 22:50:03,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 304 transitions, 5393 flow [2024-06-27 22:50:03,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:50:03,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:50:03,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-27 22:50:03,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6557971014492754 [2024-06-27 22:50:03,425 INFO L175 Difference]: Start difference. First operand has 156 places, 217 transitions, 3712 flow. Second operand 6 states and 181 transitions. [2024-06-27 22:50:03,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 304 transitions, 5393 flow [2024-06-27 22:50:03,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 304 transitions, 5080 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-27 22:50:03,712 INFO L231 Difference]: Finished difference. Result has 159 places, 250 transitions, 4443 flow [2024-06-27 22:50:03,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3467, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4443, PETRI_PLACES=159, PETRI_TRANSITIONS=250} [2024-06-27 22:50:03,712 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 109 predicate places. [2024-06-27 22:50:03,713 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 250 transitions, 4443 flow [2024-06-27 22:50:03,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:03,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:50:03,713 INFO 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 22:50:03,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 22:50:03,713 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 22:50:03,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:50:03,713 INFO L85 PathProgramCache]: Analyzing trace with hash -982080171, now seen corresponding path program 3 times [2024-06-27 22:50:03,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:50:03,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074141674] [2024-06-27 22:50:03,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:50:03,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:50:03,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:50:03,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:50:03,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:50:03,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074141674] [2024-06-27 22:50:03,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074141674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:50:03,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:50:03,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:50:03,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925067793] [2024-06-27 22:50:03,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:50:03,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:50:03,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:50:03,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:50:03,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:50:03,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:50:03,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 250 transitions, 4443 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:03,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:50:03,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:50:03,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:50:05,169 INFO L124 PetriNetUnfolderBase]: 4760/8242 cut-off events. [2024-06-27 22:50:05,170 INFO L125 PetriNetUnfolderBase]: For 99356/99365 co-relation queries the response was YES. [2024-06-27 22:50:05,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44938 conditions, 8242 events. 4760/8242 cut-off events. For 99356/99365 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 62081 event pairs, 1088 based on Foata normal form. 9/8209 useless extension candidates. Maximal degree in co-relation 44860. Up to 5812 conditions per place. [2024-06-27 22:50:05,238 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 230 selfloop transitions, 61 changer transitions 0/301 dead transitions. [2024-06-27 22:50:05,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 301 transitions, 5355 flow [2024-06-27 22:50:05,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:50:05,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:50:05,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-27 22:50:05,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6340579710144928 [2024-06-27 22:50:05,239 INFO L175 Difference]: Start difference. First operand has 159 places, 250 transitions, 4443 flow. Second operand 6 states and 175 transitions. [2024-06-27 22:50:05,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 301 transitions, 5355 flow [2024-06-27 22:50:05,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 301 transitions, 5279 flow, removed 34 selfloop flow, removed 1 redundant places. [2024-06-27 22:50:05,553 INFO L231 Difference]: Finished difference. Result has 165 places, 254 transitions, 4636 flow [2024-06-27 22:50:05,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4367, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4636, PETRI_PLACES=165, PETRI_TRANSITIONS=254} [2024-06-27 22:50:05,554 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 115 predicate places. [2024-06-27 22:50:05,554 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 254 transitions, 4636 flow [2024-06-27 22:50:05,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:05,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:50:05,554 INFO 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 22:50:05,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 22:50:05,554 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 22:50:05,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:50:05,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1549912333, now seen corresponding path program 4 times [2024-06-27 22:50:05,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:50:05,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094498558] [2024-06-27 22:50:05,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:50:05,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:50:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:50:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:50:05,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:50:05,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094498558] [2024-06-27 22:50:05,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094498558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:50:05,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:50:05,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:50:05,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759486605] [2024-06-27 22:50:05,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:50:05,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:50:05,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:50:05,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:50:05,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:50:05,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:50:05,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 254 transitions, 4636 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:05,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:50:05,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:50:05,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:50:07,194 INFO L124 PetriNetUnfolderBase]: 4911/8454 cut-off events. [2024-06-27 22:50:07,194 INFO L125 PetriNetUnfolderBase]: For 115019/115028 co-relation queries the response was YES. [2024-06-27 22:50:07,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47795 conditions, 8454 events. 4911/8454 cut-off events. For 115019/115028 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 63876 event pairs, 1425 based on Foata normal form. 9/8427 useless extension candidates. Maximal degree in co-relation 47714. Up to 3915 conditions per place. [2024-06-27 22:50:07,264 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 213 selfloop transitions, 108 changer transitions 0/331 dead transitions. [2024-06-27 22:50:07,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 331 transitions, 5994 flow [2024-06-27 22:50:07,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:50:07,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:50:07,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-27 22:50:07,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2024-06-27 22:50:07,265 INFO L175 Difference]: Start difference. First operand has 165 places, 254 transitions, 4636 flow. Second operand 7 states and 204 transitions. [2024-06-27 22:50:07,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 331 transitions, 5994 flow [2024-06-27 22:50:07,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 331 transitions, 5948 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-27 22:50:07,573 INFO L231 Difference]: Finished difference. Result has 174 places, 271 transitions, 5351 flow [2024-06-27 22:50:07,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4593, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5351, PETRI_PLACES=174, PETRI_TRANSITIONS=271} [2024-06-27 22:50:07,574 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 124 predicate places. [2024-06-27 22:50:07,574 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 271 transitions, 5351 flow [2024-06-27 22:50:07,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:07,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:50:07,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:50:07,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 22:50:07,575 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 22:50:07,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:50:07,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1459550519, now seen corresponding path program 5 times [2024-06-27 22:50:07,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:50:07,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78899008] [2024-06-27 22:50:07,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:50:07,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:50:07,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:50:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:50:07,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:50:07,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78899008] [2024-06-27 22:50:07,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78899008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:50:07,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:50:07,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:50:07,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993066696] [2024-06-27 22:50:07,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:50:07,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:50:07,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:50:07,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:50:07,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:50:07,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:50:07,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 271 transitions, 5351 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:07,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:50:07,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:50:07,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:50:09,238 INFO L124 PetriNetUnfolderBase]: 4965/8560 cut-off events. [2024-06-27 22:50:09,239 INFO L125 PetriNetUnfolderBase]: For 130276/130285 co-relation queries the response was YES. [2024-06-27 22:50:09,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51027 conditions, 8560 events. 4965/8560 cut-off events. For 130276/130285 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 64346 event pairs, 1267 based on Foata normal form. 7/8511 useless extension candidates. Maximal degree in co-relation 50941. Up to 6752 conditions per place. [2024-06-27 22:50:09,325 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 238 selfloop transitions, 86 changer transitions 0/334 dead transitions. [2024-06-27 22:50:09,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 334 transitions, 6463 flow [2024-06-27 22:50:09,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:50:09,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:50:09,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-27 22:50:09,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-06-27 22:50:09,326 INFO L175 Difference]: Start difference. First operand has 174 places, 271 transitions, 5351 flow. Second operand 7 states and 203 transitions. [2024-06-27 22:50:09,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 334 transitions, 6463 flow [2024-06-27 22:50:09,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 334 transitions, 6378 flow, removed 37 selfloop flow, removed 1 redundant places. [2024-06-27 22:50:09,787 INFO L231 Difference]: Finished difference. Result has 180 places, 283 transitions, 5781 flow [2024-06-27 22:50:09,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5267, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5781, PETRI_PLACES=180, PETRI_TRANSITIONS=283} [2024-06-27 22:50:09,787 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 130 predicate places. [2024-06-27 22:50:09,787 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 283 transitions, 5781 flow [2024-06-27 22:50:09,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:09,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:50:09,788 INFO 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 22:50:09,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 22:50:09,788 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 22:50:09,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:50:09,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1356362493, now seen corresponding path program 6 times [2024-06-27 22:50:09,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:50:09,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200698158] [2024-06-27 22:50:09,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:50:09,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:50:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:50:09,911 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 22:50:09,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:50:09,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200698158] [2024-06-27 22:50:09,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200698158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:50:09,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:50:09,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:50:09,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57330736] [2024-06-27 22:50:09,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:50:09,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:50:09,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:50:09,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:50:09,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:50:09,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:50:09,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 283 transitions, 5781 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:09,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:50:09,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:50:09,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:50:11,459 INFO L124 PetriNetUnfolderBase]: 5170/8907 cut-off events. [2024-06-27 22:50:11,459 INFO L125 PetriNetUnfolderBase]: For 137569/137575 co-relation queries the response was YES. [2024-06-27 22:50:11,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53620 conditions, 8907 events. 5170/8907 cut-off events. For 137569/137575 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 67265 event pairs, 1240 based on Foata normal form. 7/8858 useless extension candidates. Maximal degree in co-relation 53531. Up to 5742 conditions per place. [2024-06-27 22:50:11,671 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 240 selfloop transitions, 91 changer transitions 0/341 dead transitions. [2024-06-27 22:50:11,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 341 transitions, 6961 flow [2024-06-27 22:50:11,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:50:11,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:50:11,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-27 22:50:11,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6340579710144928 [2024-06-27 22:50:11,672 INFO L175 Difference]: Start difference. First operand has 180 places, 283 transitions, 5781 flow. Second operand 6 states and 175 transitions. [2024-06-27 22:50:11,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 341 transitions, 6961 flow [2024-06-27 22:50:12,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 341 transitions, 6869 flow, removed 42 selfloop flow, removed 1 redundant places. [2024-06-27 22:50:12,097 INFO L231 Difference]: Finished difference. Result has 186 places, 291 transitions, 6134 flow [2024-06-27 22:50:12,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5689, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6134, PETRI_PLACES=186, PETRI_TRANSITIONS=291} [2024-06-27 22:50:12,097 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 136 predicate places. [2024-06-27 22:50:12,097 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 291 transitions, 6134 flow [2024-06-27 22:50:12,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:12,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:50:12,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:50:12,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 22:50:12,098 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 22:50:12,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:50:12,098 INFO L85 PathProgramCache]: Analyzing trace with hash 262411959, now seen corresponding path program 7 times [2024-06-27 22:50:12,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:50:12,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964600497] [2024-06-27 22:50:12,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:50:12,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:50:12,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:50:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:50:12,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:50:12,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964600497] [2024-06-27 22:50:12,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964600497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:50:12,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:50:12,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:50:12,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450545887] [2024-06-27 22:50:12,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:50:12,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:50:12,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:50:12,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:50:12,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:50:12,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:50:12,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 291 transitions, 6134 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:12,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:50:12,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:50:12,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:50:13,697 INFO L124 PetriNetUnfolderBase]: 5164/8896 cut-off events. [2024-06-27 22:50:13,697 INFO L125 PetriNetUnfolderBase]: For 148473/148479 co-relation queries the response was YES. [2024-06-27 22:50:13,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55379 conditions, 8896 events. 5164/8896 cut-off events. For 148473/148479 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 67293 event pairs, 1160 based on Foata normal form. 5/8850 useless extension candidates. Maximal degree in co-relation 55287. Up to 5736 conditions per place. [2024-06-27 22:50:13,790 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 220 selfloop transitions, 127 changer transitions 0/357 dead transitions. [2024-06-27 22:50:13,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 357 transitions, 7204 flow [2024-06-27 22:50:13,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 22:50:13,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 22:50:13,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-27 22:50:13,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 22:50:13,792 INFO L175 Difference]: Start difference. First operand has 186 places, 291 transitions, 6134 flow. Second operand 8 states and 230 transitions. [2024-06-27 22:50:13,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 357 transitions, 7204 flow [2024-06-27 22:50:14,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 357 transitions, 7021 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-27 22:50:14,349 INFO L231 Difference]: Finished difference. Result has 191 places, 293 transitions, 6279 flow [2024-06-27 22:50:14,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5967, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6279, PETRI_PLACES=191, PETRI_TRANSITIONS=293} [2024-06-27 22:50:14,349 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 141 predicate places. [2024-06-27 22:50:14,349 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 293 transitions, 6279 flow [2024-06-27 22:50:14,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:14,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:50:14,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:50:14,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 22:50:14,350 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 22:50:14,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:50:14,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1732974363, now seen corresponding path program 8 times [2024-06-27 22:50:14,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:50:14,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919159958] [2024-06-27 22:50:14,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:50:14,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:50:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:50:14,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:50:14,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:50:14,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919159958] [2024-06-27 22:50:14,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919159958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:50:14,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:50:14,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:50:14,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710471435] [2024-06-27 22:50:14,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:50:14,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:50:14,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:50:14,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:50:14,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:50:14,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:50:14,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 293 transitions, 6279 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:14,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:50:14,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:50:14,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:50:15,999 INFO L124 PetriNetUnfolderBase]: 5468/9375 cut-off events. [2024-06-27 22:50:15,999 INFO L125 PetriNetUnfolderBase]: For 160861/160867 co-relation queries the response was YES. [2024-06-27 22:50:16,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59987 conditions, 9375 events. 5468/9375 cut-off events. For 160861/160867 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 71201 event pairs, 1158 based on Foata normal form. 7/9341 useless extension candidates. Maximal degree in co-relation 59894. Up to 5542 conditions per place. [2024-06-27 22:50:16,098 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 254 selfloop transitions, 95 changer transitions 0/359 dead transitions. [2024-06-27 22:50:16,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 359 transitions, 7541 flow [2024-06-27 22:50:16,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:50:16,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:50:16,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-27 22:50:16,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6242236024844721 [2024-06-27 22:50:16,099 INFO L175 Difference]: Start difference. First operand has 191 places, 293 transitions, 6279 flow. Second operand 7 states and 201 transitions. [2024-06-27 22:50:16,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 359 transitions, 7541 flow [2024-06-27 22:50:16,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 359 transitions, 7289 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 22:50:16,644 INFO L231 Difference]: Finished difference. Result has 193 places, 304 transitions, 6556 flow [2024-06-27 22:50:16,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6031, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6556, PETRI_PLACES=193, PETRI_TRANSITIONS=304} [2024-06-27 22:50:16,645 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 143 predicate places. [2024-06-27 22:50:16,645 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 304 transitions, 6556 flow [2024-06-27 22:50:16,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:16,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:50:16,646 INFO 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 22:50:16,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 22:50:16,646 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 22:50:16,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:50:16,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1727260443, now seen corresponding path program 9 times [2024-06-27 22:50:16,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:50:16,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541526347] [2024-06-27 22:50:16,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:50:16,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:50:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:50:16,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:50:16,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:50:16,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541526347] [2024-06-27 22:50:16,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541526347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:50:16,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:50:16,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:50:16,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433033031] [2024-06-27 22:50:16,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:50:16,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:50:16,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:50:16,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:50:16,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:50:16,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:50:16,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 304 transitions, 6556 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:16,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:50:16,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:50:16,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:50:18,342 INFO L124 PetriNetUnfolderBase]: 5460/9356 cut-off events. [2024-06-27 22:50:18,342 INFO L125 PetriNetUnfolderBase]: For 175010/175016 co-relation queries the response was YES. [2024-06-27 22:50:18,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61504 conditions, 9356 events. 5460/9356 cut-off events. For 175010/175016 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 71026 event pairs, 1165 based on Foata normal form. 7/9322 useless extension candidates. Maximal degree in co-relation 61409. Up to 5539 conditions per place. [2024-06-27 22:50:18,435 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 271 selfloop transitions, 84 changer transitions 0/365 dead transitions. [2024-06-27 22:50:18,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 365 transitions, 7736 flow [2024-06-27 22:50:18,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:50:18,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:50:18,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-27 22:50:18,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6273291925465838 [2024-06-27 22:50:18,437 INFO L175 Difference]: Start difference. First operand has 193 places, 304 transitions, 6556 flow. Second operand 7 states and 202 transitions. [2024-06-27 22:50:18,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 365 transitions, 7736 flow [2024-06-27 22:50:18,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 365 transitions, 7531 flow, removed 71 selfloop flow, removed 2 redundant places. [2024-06-27 22:50:19,002 INFO L231 Difference]: Finished difference. Result has 198 places, 304 transitions, 6526 flow [2024-06-27 22:50:19,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6351, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6526, PETRI_PLACES=198, PETRI_TRANSITIONS=304} [2024-06-27 22:50:19,003 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 148 predicate places. [2024-06-27 22:50:19,003 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 304 transitions, 6526 flow [2024-06-27 22:50:19,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:19,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:50:19,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:50:19,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 22:50:19,004 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 22:50:19,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:50:19,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1533672573, now seen corresponding path program 10 times [2024-06-27 22:50:19,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:50:19,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211486899] [2024-06-27 22:50:19,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:50:19,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:50:19,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:50:19,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:50:19,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:50:19,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211486899] [2024-06-27 22:50:19,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211486899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:50:19,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:50:19,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:50:19,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461581923] [2024-06-27 22:50:19,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:50:19,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:50:19,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:50:19,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:50:19,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:50:19,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:50:19,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 304 transitions, 6526 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:19,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:50:19,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:50:19,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:50:20,772 INFO L124 PetriNetUnfolderBase]: 5457/9375 cut-off events. [2024-06-27 22:50:20,772 INFO L125 PetriNetUnfolderBase]: For 172325/172331 co-relation queries the response was YES. [2024-06-27 22:50:20,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61491 conditions, 9375 events. 5457/9375 cut-off events. For 172325/172331 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 71555 event pairs, 1243 based on Foata normal form. 5/9345 useless extension candidates. Maximal degree in co-relation 61394. Up to 5538 conditions per place. [2024-06-27 22:50:20,867 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 230 selfloop transitions, 123 changer transitions 0/363 dead transitions. [2024-06-27 22:50:20,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 363 transitions, 7604 flow [2024-06-27 22:50:20,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:50:20,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:50:20,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-27 22:50:20,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2024-06-27 22:50:20,868 INFO L175 Difference]: Start difference. First operand has 198 places, 304 transitions, 6526 flow. Second operand 7 states and 204 transitions. [2024-06-27 22:50:20,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 363 transitions, 7604 flow [2024-06-27 22:50:21,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 363 transitions, 7410 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 22:50:21,408 INFO L231 Difference]: Finished difference. Result has 200 places, 308 transitions, 6693 flow [2024-06-27 22:50:21,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6335, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6693, PETRI_PLACES=200, PETRI_TRANSITIONS=308} [2024-06-27 22:50:21,408 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 150 predicate places. [2024-06-27 22:50:21,408 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 308 transitions, 6693 flow [2024-06-27 22:50:21,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:21,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:50:21,409 INFO 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 22:50:21,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 22:50:21,409 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 22:50:21,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:50:21,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1021633372, now seen corresponding path program 1 times [2024-06-27 22:50:21,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:50:21,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571140400] [2024-06-27 22:50:21,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:50:21,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:50:21,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:50:21,472 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 22:50:21,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:50:21,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571140400] [2024-06-27 22:50:21,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571140400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:50:21,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:50:21,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 22:50:21,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940464485] [2024-06-27 22:50:21,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:50:21,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 22:50:21,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:50:21,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 22:50:21,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 22:50:21,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-06-27 22:50:21,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 308 transitions, 6693 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 22:50:21,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:50:21,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-06-27 22:50:21,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:50:23,437 INFO L124 PetriNetUnfolderBase]: 7602/12188 cut-off events. [2024-06-27 22:50:23,437 INFO L125 PetriNetUnfolderBase]: For 270020/271016 co-relation queries the response was YES. [2024-06-27 22:50:23,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69366 conditions, 12188 events. 7602/12188 cut-off events. For 270020/271016 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 85194 event pairs, 977 based on Foata normal form. 977/13089 useless extension candidates. Maximal degree in co-relation 69268. Up to 5366 conditions per place. [2024-06-27 22:50:23,547 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 286 selfloop transitions, 5 changer transitions 0/350 dead transitions. [2024-06-27 22:50:23,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 350 transitions, 7402 flow [2024-06-27 22:50:23,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 22:50:23,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 22:50:23,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-06-27 22:50:23,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195652173913043 [2024-06-27 22:50:23,548 INFO L175 Difference]: Start difference. First operand has 200 places, 308 transitions, 6693 flow. Second operand 4 states and 114 transitions. [2024-06-27 22:50:23,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 350 transitions, 7402 flow [2024-06-27 22:50:23,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 350 transitions, 6569 flow, removed 45 selfloop flow, removed 24 redundant places. [2024-06-27 22:50:23,844 INFO L231 Difference]: Finished difference. Result has 181 places, 233 transitions, 4081 flow [2024-06-27 22:50:23,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4043, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4081, PETRI_PLACES=181, PETRI_TRANSITIONS=233} [2024-06-27 22:50:23,845 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 131 predicate places. [2024-06-27 22:50:23,845 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 233 transitions, 4081 flow [2024-06-27 22:50:23,845 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 22:50:23,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:50:23,845 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, 1] [2024-06-27 22:50:23,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 22:50:23,845 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 22:50:23,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:50:23,845 INFO L85 PathProgramCache]: Analyzing trace with hash 2039565772, now seen corresponding path program 1 times [2024-06-27 22:50:23,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:50:23,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31164769] [2024-06-27 22:50:23,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:50:23,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:50:23,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:50:24,151 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 22:50:24,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:50:24,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31164769] [2024-06-27 22:50:24,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31164769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:50:24,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:50:24,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:50:24,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339795036] [2024-06-27 22:50:24,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:50:24,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:50:24,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:50:24,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:50:24,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:50:24,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:50:24,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 233 transitions, 4081 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:24,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:50:24,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:50:24,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:50:26,114 INFO L124 PetriNetUnfolderBase]: 6711/11681 cut-off events. [2024-06-27 22:50:26,114 INFO L125 PetriNetUnfolderBase]: For 183649/183718 co-relation queries the response was YES. [2024-06-27 22:50:26,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64875 conditions, 11681 events. 6711/11681 cut-off events. For 183649/183718 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 91283 event pairs, 1552 based on Foata normal form. 57/11457 useless extension candidates. Maximal degree in co-relation 64787. Up to 6363 conditions per place. [2024-06-27 22:50:26,231 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 199 selfloop transitions, 88 changer transitions 6/306 dead transitions. [2024-06-27 22:50:26,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 306 transitions, 5376 flow [2024-06-27 22:50:26,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:50:26,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:50:26,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-27 22:50:26,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6211180124223602 [2024-06-27 22:50:26,232 INFO L175 Difference]: Start difference. First operand has 181 places, 233 transitions, 4081 flow. Second operand 7 states and 200 transitions. [2024-06-27 22:50:26,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 306 transitions, 5376 flow [2024-06-27 22:50:26,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 306 transitions, 5369 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 22:50:26,697 INFO L231 Difference]: Finished difference. Result has 190 places, 245 transitions, 4664 flow [2024-06-27 22:50:26,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4079, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4664, PETRI_PLACES=190, PETRI_TRANSITIONS=245} [2024-06-27 22:50:26,697 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 140 predicate places. [2024-06-27 22:50:26,697 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 245 transitions, 4664 flow [2024-06-27 22:50:26,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:26,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:50:26,697 INFO L208 CegarLoopForPetriNet]: trace 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 22:50:26,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 22:50:26,698 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 22:50:26,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:50:26,698 INFO L85 PathProgramCache]: Analyzing trace with hash 499612535, now seen corresponding path program 1 times [2024-06-27 22:50:26,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:50:26,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883430734] [2024-06-27 22:50:26,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:50:26,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:50:26,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:50:27,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:50:27,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:50:27,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883430734] [2024-06-27 22:50:27,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883430734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:50:27,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:50:27,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 22:50:27,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455109421] [2024-06-27 22:50:27,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:50:27,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 22:50:27,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:50:27,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 22:50:27,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 22:50:27,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-06-27 22:50:27,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 245 transitions, 4664 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:27,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:50:27,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-06-27 22:50:27,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:50:29,327 INFO L124 PetriNetUnfolderBase]: 6392/11060 cut-off events. [2024-06-27 22:50:29,327 INFO L125 PetriNetUnfolderBase]: For 200250/200259 co-relation queries the response was YES. [2024-06-27 22:50:29,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64090 conditions, 11060 events. 6392/11060 cut-off events. For 200250/200259 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 84399 event pairs, 1685 based on Foata normal form. 5/10794 useless extension candidates. Maximal degree in co-relation 63996. Up to 7743 conditions per place. [2024-06-27 22:50:29,415 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 214 selfloop transitions, 97 changer transitions 0/323 dead transitions. [2024-06-27 22:50:29,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 323 transitions, 5772 flow [2024-06-27 22:50:29,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 22:50:29,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 22:50:29,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 255 transitions. [2024-06-27 22:50:29,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5543478260869565 [2024-06-27 22:50:29,417 INFO L175 Difference]: Start difference. First operand has 190 places, 245 transitions, 4664 flow. Second operand 10 states and 255 transitions. [2024-06-27 22:50:29,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 323 transitions, 5772 flow [2024-06-27 22:50:29,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 323 transitions, 5627 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-27 22:50:29,871 INFO L231 Difference]: Finished difference. Result has 197 places, 258 transitions, 4969 flow [2024-06-27 22:50:29,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4539, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4969, PETRI_PLACES=197, PETRI_TRANSITIONS=258} [2024-06-27 22:50:29,871 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 147 predicate places. [2024-06-27 22:50:29,871 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 258 transitions, 4969 flow [2024-06-27 22:50:29,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:29,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:50:29,871 INFO L208 CegarLoopForPetriNet]: trace 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 22:50:29,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 22:50:29,872 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 22:50:29,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:50:29,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1502480504, now seen corresponding path program 2 times [2024-06-27 22:50:29,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:50:29,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125206400] [2024-06-27 22:50:29,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:50:29,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:50:29,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:50:30,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:50:30,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:50:30,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125206400] [2024-06-27 22:50:30,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125206400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:50:30,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:50:30,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:50:30,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408691469] [2024-06-27 22:50:30,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:50:30,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:50:30,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:50:30,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:50:30,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:50:30,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:50:30,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 258 transitions, 4969 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:30,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:50:30,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:50:30,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:50:31,830 INFO L124 PetriNetUnfolderBase]: 6423/11075 cut-off events. [2024-06-27 22:50:31,830 INFO L125 PetriNetUnfolderBase]: For 200951/200966 co-relation queries the response was YES. [2024-06-27 22:50:31,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63554 conditions, 11075 events. 6423/11075 cut-off events. For 200951/200966 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 84068 event pairs, 1721 based on Foata normal form. 2/10806 useless extension candidates. Maximal degree in co-relation 63460. Up to 6186 conditions per place. [2024-06-27 22:50:31,950 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 209 selfloop transitions, 96 changer transitions 0/318 dead transitions. [2024-06-27 22:50:31,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 318 transitions, 6068 flow [2024-06-27 22:50:31,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:50:31,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:50:31,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-27 22:50:31,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366459627329193 [2024-06-27 22:50:31,951 INFO L175 Difference]: Start difference. First operand has 197 places, 258 transitions, 4969 flow. Second operand 7 states and 205 transitions. [2024-06-27 22:50:31,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 318 transitions, 6068 flow [2024-06-27 22:50:32,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 318 transitions, 5842 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 22:50:32,577 INFO L231 Difference]: Finished difference. Result has 199 places, 262 transitions, 5104 flow [2024-06-27 22:50:32,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4745, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5104, PETRI_PLACES=199, PETRI_TRANSITIONS=262} [2024-06-27 22:50:32,578 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 149 predicate places. [2024-06-27 22:50:32,578 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 262 transitions, 5104 flow [2024-06-27 22:50:32,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:32,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:50:32,578 INFO L208 CegarLoopForPetriNet]: trace 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 22:50:32,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 22:50:32,578 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 22:50:32,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:50:32,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1032061345, now seen corresponding path program 2 times [2024-06-27 22:50:32,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:50:32,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020291392] [2024-06-27 22:50:32,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:50:32,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:50:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:50:33,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:50:33,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:50:33,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020291392] [2024-06-27 22:50:33,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020291392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:50:33,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:50:33,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:50:33,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550805333] [2024-06-27 22:50:33,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:50:33,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:50:33,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:50:33,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:50:33,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:50:33,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:50:33,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 262 transitions, 5104 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:33,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:50:33,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:50:33,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:50:34,847 INFO L124 PetriNetUnfolderBase]: 6346/10969 cut-off events. [2024-06-27 22:50:34,847 INFO L125 PetriNetUnfolderBase]: For 215731/215740 co-relation queries the response was YES. [2024-06-27 22:50:34,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64224 conditions, 10969 events. 6346/10969 cut-off events. For 215731/215740 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 83655 event pairs, 1631 based on Foata normal form. 5/10714 useless extension candidates. Maximal degree in co-relation 64129. Up to 7679 conditions per place. [2024-06-27 22:50:34,965 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 199 selfloop transitions, 85 changer transitions 0/297 dead transitions. [2024-06-27 22:50:34,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 297 transitions, 5789 flow [2024-06-27 22:50:34,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:50:34,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:50:34,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-27 22:50:34,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6123188405797102 [2024-06-27 22:50:34,966 INFO L175 Difference]: Start difference. First operand has 199 places, 262 transitions, 5104 flow. Second operand 6 states and 169 transitions. [2024-06-27 22:50:34,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 297 transitions, 5789 flow [2024-06-27 22:50:35,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 297 transitions, 5641 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-27 22:50:35,530 INFO L231 Difference]: Finished difference. Result has 200 places, 262 transitions, 5155 flow [2024-06-27 22:50:35,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4956, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5155, PETRI_PLACES=200, PETRI_TRANSITIONS=262} [2024-06-27 22:50:35,530 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 150 predicate places. [2024-06-27 22:50:35,530 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 262 transitions, 5155 flow [2024-06-27 22:50:35,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:35,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:50:35,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:50:35,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 22:50:35,531 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 22:50:35,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:50:35,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1164682864, now seen corresponding path program 3 times [2024-06-27 22:50:35,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:50:35,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498034150] [2024-06-27 22:50:35,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:50:35,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:50:35,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:50:35,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:50:35,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:50:35,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498034150] [2024-06-27 22:50:35,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498034150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:50:35,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:50:35,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 22:50:35,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580192521] [2024-06-27 22:50:35,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:50:35,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 22:50:35,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:50:35,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 22:50:35,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 22:50:35,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-06-27 22:50:35,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 262 transitions, 5155 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:35,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:50:35,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-06-27 22:50:35,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:50:38,973 INFO L124 PetriNetUnfolderBase]: 11349/19751 cut-off events. [2024-06-27 22:50:38,973 INFO L125 PetriNetUnfolderBase]: For 368703/368745 co-relation queries the response was YES. [2024-06-27 22:50:39,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110603 conditions, 19751 events. 11349/19751 cut-off events. For 368703/368745 co-relation queries the response was YES. Maximal size of possible extension queue 1208. Compared 167774 event pairs, 3200 based on Foata normal form. 19/19256 useless extension candidates. Maximal degree in co-relation 110508. Up to 7198 conditions per place. [2024-06-27 22:50:39,260 INFO L140 encePairwiseOnDemand]: 33/46 looper letters, 347 selfloop transitions, 156 changer transitions 0/515 dead transitions. [2024-06-27 22:50:39,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 515 transitions, 9698 flow [2024-06-27 22:50:39,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 22:50:39,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 22:50:39,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 331 transitions. [2024-06-27 22:50:39,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5996376811594203 [2024-06-27 22:50:39,261 INFO L175 Difference]: Start difference. First operand has 200 places, 262 transitions, 5155 flow. Second operand 12 states and 331 transitions. [2024-06-27 22:50:39,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 515 transitions, 9698 flow [2024-06-27 22:50:40,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 515 transitions, 9315 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 22:50:40,741 INFO L231 Difference]: Finished difference. Result has 214 places, 330 transitions, 6923 flow [2024-06-27 22:50:40,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4947, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6923, PETRI_PLACES=214, PETRI_TRANSITIONS=330} [2024-06-27 22:50:40,742 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 164 predicate places. [2024-06-27 22:50:40,742 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 330 transitions, 6923 flow [2024-06-27 22:50:40,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:40,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:50:40,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:50:40,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 22:50:40,742 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 22:50:40,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:50:40,743 INFO L85 PathProgramCache]: Analyzing trace with hash -813942320, now seen corresponding path program 4 times [2024-06-27 22:50:40,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:50:40,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850163286] [2024-06-27 22:50:40,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:50:40,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:50:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:50:41,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:50:41,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:50:41,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850163286] [2024-06-27 22:50:41,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850163286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:50:41,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:50:41,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:50:41,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694882716] [2024-06-27 22:50:41,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:50:41,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:50:41,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:50:41,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:50:41,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:50:41,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:50:41,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 330 transitions, 6923 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:41,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:50:41,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:50:41,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:50:45,061 INFO L124 PetriNetUnfolderBase]: 11894/20744 cut-off events. [2024-06-27 22:50:45,061 INFO L125 PetriNetUnfolderBase]: For 447336/447367 co-relation queries the response was YES. [2024-06-27 22:50:45,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123649 conditions, 20744 events. 11894/20744 cut-off events. For 447336/447367 co-relation queries the response was YES. Maximal size of possible extension queue 1275. Compared 177973 event pairs, 3474 based on Foata normal form. 15/20218 useless extension candidates. Maximal degree in co-relation 123547. Up to 8886 conditions per place. [2024-06-27 22:50:45,268 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 242 selfloop transitions, 162 changer transitions 0/417 dead transitions. [2024-06-27 22:50:45,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 417 transitions, 8626 flow [2024-06-27 22:50:45,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 22:50:45,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 22:50:45,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-27 22:50:45,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6331521739130435 [2024-06-27 22:50:45,269 INFO L175 Difference]: Start difference. First operand has 214 places, 330 transitions, 6923 flow. Second operand 8 states and 233 transitions. [2024-06-27 22:50:45,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 417 transitions, 8626 flow [2024-06-27 22:50:47,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 417 transitions, 8448 flow, removed 76 selfloop flow, removed 3 redundant places. [2024-06-27 22:50:47,429 INFO L231 Difference]: Finished difference. Result has 221 places, 341 transitions, 7552 flow [2024-06-27 22:50:47,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6745, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7552, PETRI_PLACES=221, PETRI_TRANSITIONS=341} [2024-06-27 22:50:47,430 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 171 predicate places. [2024-06-27 22:50:47,430 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 341 transitions, 7552 flow [2024-06-27 22:50:47,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:47,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:50:47,430 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, 1] [2024-06-27 22:50:47,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 22:50:47,431 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 22:50:47,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:50:47,431 INFO L85 PathProgramCache]: Analyzing trace with hash -669873044, now seen corresponding path program 1 times [2024-06-27 22:50:47,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:50:47,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137050616] [2024-06-27 22:50:47,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:50:47,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:50:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:50:47,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:50:47,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:50:47,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137050616] [2024-06-27 22:50:47,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137050616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:50:47,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:50:47,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:50:47,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571092115] [2024-06-27 22:50:47,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:50:47,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:50:47,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:50:47,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:50:47,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:50:47,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:50:47,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 341 transitions, 7552 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:47,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:50:47,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:50:47,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:50:52,213 INFO L124 PetriNetUnfolderBase]: 12056/21107 cut-off events. [2024-06-27 22:50:52,213 INFO L125 PetriNetUnfolderBase]: For 486854/486906 co-relation queries the response was YES. [2024-06-27 22:50:52,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129034 conditions, 21107 events. 12056/21107 cut-off events. For 486854/486906 co-relation queries the response was YES. Maximal size of possible extension queue 1278. Compared 182595 event pairs, 5990 based on Foata normal form. 20/20538 useless extension candidates. Maximal degree in co-relation 128930. Up to 15122 conditions per place. [2024-06-27 22:50:52,419 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 257 selfloop transitions, 135 changer transitions 0/405 dead transitions. [2024-06-27 22:50:52,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 405 transitions, 8912 flow [2024-06-27 22:50:52,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 22:50:52,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 22:50:52,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2024-06-27 22:50:52,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5630434782608695 [2024-06-27 22:50:52,420 INFO L175 Difference]: Start difference. First operand has 221 places, 341 transitions, 7552 flow. Second operand 10 states and 259 transitions. [2024-06-27 22:50:52,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 405 transitions, 8912 flow [2024-06-27 22:50:54,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 405 transitions, 8756 flow, removed 61 selfloop flow, removed 2 redundant places. [2024-06-27 22:50:54,680 INFO L231 Difference]: Finished difference. Result has 230 places, 349 transitions, 7991 flow [2024-06-27 22:50:54,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7396, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7991, PETRI_PLACES=230, PETRI_TRANSITIONS=349} [2024-06-27 22:50:54,681 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 180 predicate places. [2024-06-27 22:50:54,681 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 349 transitions, 7991 flow [2024-06-27 22:50:54,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:54,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:50:54,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:50:54,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 22:50:54,682 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 22:50:54,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:50:54,682 INFO L85 PathProgramCache]: Analyzing trace with hash -491718768, now seen corresponding path program 5 times [2024-06-27 22:50:54,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:50:54,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723377443] [2024-06-27 22:50:54,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:50:54,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:50:54,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:50:55,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:50:55,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:50:55,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723377443] [2024-06-27 22:50:55,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723377443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:50:55,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:50:55,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 22:50:55,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101998082] [2024-06-27 22:50:55,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:50:55,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 22:50:55,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:50:55,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 22:50:55,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 22:50:55,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-06-27 22:50:55,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 349 transitions, 7991 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:50:55,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:50:55,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-06-27 22:50:55,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:50:59,866 INFO L124 PetriNetUnfolderBase]: 12149/21246 cut-off events. [2024-06-27 22:50:59,866 INFO L125 PetriNetUnfolderBase]: For 484495/484506 co-relation queries the response was YES. [2024-06-27 22:51:00,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130824 conditions, 21246 events. 12149/21246 cut-off events. For 484495/484506 co-relation queries the response was YES. Maximal size of possible extension queue 1296. Compared 183024 event pairs, 2319 based on Foata normal form. 7/20776 useless extension candidates. Maximal degree in co-relation 130716. Up to 9104 conditions per place. [2024-06-27 22:51:00,096 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 234 selfloop transitions, 250 changer transitions 0/496 dead transitions. [2024-06-27 22:51:00,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 496 transitions, 10744 flow [2024-06-27 22:51:00,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 22:51:00,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 22:51:00,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 367 transitions. [2024-06-27 22:51:00,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5318840579710145 [2024-06-27 22:51:00,097 INFO L175 Difference]: Start difference. First operand has 230 places, 349 transitions, 7991 flow. Second operand 15 states and 367 transitions. [2024-06-27 22:51:00,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 496 transitions, 10744 flow [2024-06-27 22:51:02,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 496 transitions, 10533 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-27 22:51:02,617 INFO L231 Difference]: Finished difference. Result has 244 places, 395 transitions, 9593 flow [2024-06-27 22:51:02,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7780, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9593, PETRI_PLACES=244, PETRI_TRANSITIONS=395} [2024-06-27 22:51:02,618 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 194 predicate places. [2024-06-27 22:51:02,618 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 395 transitions, 9593 flow [2024-06-27 22:51:02,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:51:02,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:51:02,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:51:02,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 22:51:02,619 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 22:51:02,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:51:02,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1034905100, now seen corresponding path program 6 times [2024-06-27 22:51:02,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:51:02,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866367987] [2024-06-27 22:51:02,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:51:02,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:51:02,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:51:02,797 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 22:51:02,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:51:02,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866367987] [2024-06-27 22:51:02,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866367987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:51:02,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:51:02,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:51:02,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063095494] [2024-06-27 22:51:02,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:51:02,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:51:02,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:51:02,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:51:02,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:51:02,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:51:02,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 395 transitions, 9593 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 22:51:02,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:51:02,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:51:02,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:51:07,398 INFO L124 PetriNetUnfolderBase]: 12382/21491 cut-off events. [2024-06-27 22:51:07,399 INFO L125 PetriNetUnfolderBase]: For 536093/536102 co-relation queries the response was YES. [2024-06-27 22:51:07,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138226 conditions, 21491 events. 12382/21491 cut-off events. For 536093/536102 co-relation queries the response was YES. Maximal size of possible extension queue 1323. Compared 184987 event pairs, 3131 based on Foata normal form. 7/20966 useless extension candidates. Maximal degree in co-relation 138113. Up to 11035 conditions per place. [2024-06-27 22:51:07,657 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 293 selfloop transitions, 155 changer transitions 0/461 dead transitions. [2024-06-27 22:51:07,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 461 transitions, 11093 flow [2024-06-27 22:51:07,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 22:51:07,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 22:51:07,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-27 22:51:07,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6180124223602484 [2024-06-27 22:51:07,659 INFO L175 Difference]: Start difference. First operand has 244 places, 395 transitions, 9593 flow. Second operand 7 states and 199 transitions. [2024-06-27 22:51:07,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 461 transitions, 11093 flow [2024-06-27 22:51:10,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 461 transitions, 10752 flow, removed 122 selfloop flow, removed 3 redundant places. [2024-06-27 22:51:10,393 INFO L231 Difference]: Finished difference. Result has 249 places, 404 transitions, 9855 flow [2024-06-27 22:51:10,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9276, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9855, PETRI_PLACES=249, PETRI_TRANSITIONS=404} [2024-06-27 22:51:10,393 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 199 predicate places. [2024-06-27 22:51:10,394 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 404 transitions, 9855 flow [2024-06-27 22:51:10,394 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 22:51:10,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:51:10,394 INFO L208 CegarLoopForPetriNet]: trace 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 22:51:10,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 22:51:10,394 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 22:51:10,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:51:10,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1315188988, now seen corresponding path program 2 times [2024-06-27 22:51:10,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:51:10,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249322253] [2024-06-27 22:51:10,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:51:10,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:51:10,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:51:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:51:10,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:51:10,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249322253] [2024-06-27 22:51:10,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249322253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:51:10,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:51:10,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:51:10,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175379540] [2024-06-27 22:51:10,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:51:10,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:51:10,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:51:10,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:51:10,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:51:10,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-27 22:51:10,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 404 transitions, 9855 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:51:10,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:51:10,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-27 22:51:10,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:51:15,411 INFO L124 PetriNetUnfolderBase]: 12577/22022 cut-off events. [2024-06-27 22:51:15,411 INFO L125 PetriNetUnfolderBase]: For 539028/539042 co-relation queries the response was YES. [2024-06-27 22:51:15,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138641 conditions, 22022 events. 12577/22022 cut-off events. For 539028/539042 co-relation queries the response was YES. Maximal size of possible extension queue 1293. Compared 190606 event pairs, 2649 based on Foata normal form. 102/21575 useless extension candidates. Maximal degree in co-relation 138527. Up to 9004 conditions per place. [2024-06-27 22:51:15,659 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 296 selfloop transitions, 179 changer transitions 0/488 dead transitions. [2024-06-27 22:51:15,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 488 transitions, 11599 flow [2024-06-27 22:51:15,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 22:51:15,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 22:51:15,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-06-27 22:51:15,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358695652173914 [2024-06-27 22:51:15,660 INFO L175 Difference]: Start difference. First operand has 249 places, 404 transitions, 9855 flow. Second operand 8 states and 234 transitions. [2024-06-27 22:51:15,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 488 transitions, 11599 flow